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JHR 56:241-261 (2016) JOURNAL OF ree sno r
Bee eat ($-) Hymenoptera

http://jhr.pensoft.net The Inzrational Society of ymenoptersts. RESEARCH

Archaeoteleia Masner in the Cretaceous
and a new species of Proteroscelio Brues
(Hymenoptera, Platygastroidea)

Elijah J. Talamas', Norman F. Johnson’, Matthew L. Buffington', Dong Ren?

I Systematic Entomology Laboratory, USDA/ARS clo USNM, Smithsonian Institution, Washington, D.C.
20560, U.S.A. 2. Department of Evolution, Ecology and Organismal Biology, The Ohio State University, 1315
Kinnear Road, Columbus, Ohio 43212, U.S.A. 3 Key Lab of Insect Evolution and Environmental Change, Col-
lege of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China

Corresponding author: Elijah J. Talamas (talamas.1@osu.edu)

Academic editor: M. Yoder | Received 2 September 2016 | Accepted 8 December 2016 | Published 21 June 2016
http://zoobank. ore/EEBDD2DB-22D 9-4A4B-AF65-4940298 C2809

Citation: Talamas EJ, Johnson NE, Buffington ML, Dong R (2016) Archaeoteleia Masner in the Cretaceous and a new
species of Proteroscelio Brues (Hymenoptera, Platygastroidea). In: Talamas EJ, Buffington ML (Eds) Advances in the
Systematics of Platygastroidea. Journal of Hymenoptera Research 56: 241-261. https://doi.org/10.3897/jhr.56.10388

Abstract

The generic concepts of Archaeoteleia Masner and Proteroscelio Brues are expanded to accommodate two
new species that are here described: Archaeoteleia astropulvis Talamas sp. n. and Proteroscelio nexus Talamas
sp. n. A specimen of Archaeoteleia from Baltic amber is illustrated and discussed. Diagnoses of Proterosce-
lio, Proterosceliopsis Ortega-Blanco, McKellar & Engel and Bruescelio Ortega-Blanco, McKellar & Engel, a
key to Cretaceous platygastroid genera with 14-merous antennae, and a key to the species of Proteroscelio
are presented.

Keywords

amber, fossil, Archaeoteleia, Bruescelio, Proteroscelio, Proterosceliopsis

Copyright Elijah J. Talamas et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC
BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

242 Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

Introduction

This work was catalyzed by two platygastroid specimens in Burmese amber brought
to the National Museum of Natural History by Longfeng Li, a visiting student from
Capitol Normal University, Beijing, during her study on fossil Hymenoptera. Both
inclusions are exceptionally well preserved, and upon close examination, the speci-
mens warrant expansion of the concepts of the genera to which they belong: Prot-
eroscelio Brues and Archaeoteleia Masner. The former is only known from Cretaceous
amber (Brues 1937, Johnson et al. 2008), while the latter has, until now, only been
known from extant specimens in South America and New Zealand (Masner 1968,
Early et al. 2007).

The generic placement of Archaeoteleia astropulvis Talamas exemplifies the im-
portance of understanding the extant fauna of a taxon to interpret fossils. We place
A, astropulvis in Archaeoteleia without reservation, but over the course of 100 million
years, Archaeoteleia has changed enough that a novice might not recognize the char-
acters that unite the fossil with extant species. This is particularly relevant because A.
astropulvis does not fully comply with a generic concept of Archaeoteleia based solely
on extant specimens (Early et al. 2007). Through examination of this specimen we
discovered a new character that is found throughout Archaeoteleia, the form of the an-
terior mesepisternal area, which we use to reinforce the generic concept. Such union
of fossil and extant morphologies is especially illuminating and requires examination
of both kinds of specimens.

Proteroscelio nexus Valamas expands the range of morphological diversity found in Pro-
teroscelio and reduces the number of characters that separate Proteroscelio from Bruescelio
Ortega-Blanco, McKellar & Engel and Proterosceliopsis Ortega-Blanco, McKellar & Engel.

As summarized in Talamas et al. (2015), dates of lineages are increasingly being
utilized to understand the evolutionary history of groups with dating algorithms that
rely on accurate taxonomy for proper calibration. Archaeoteleia astropulvis extends the
age of Archacoteleia ~100 million years into the past and confirms that it retains plesio-
morphic characters, as was first posited by Masner (1968).

Materials and methods

The numbers prefixed with “USNMENT” or “OSUC ” are unique identifiers for the
individual specimens (note the blank space after some acronyms). The specimens in
Burmese amber were given “USNMENT” collecting unit identifiers, and are also ref-
erenced by CNU collection numbers. Both identifiers are presented in the Material
Examined sections. Details on the data associated with these specimens may be ac-
cessed at the following link: purl-oclc.org/NET/hymenoptera/hol, and entering the
identifier in the form. Persistent URIs for each taxonomic concept were minted by
xBio:D in accordance with best practices recommended by Hagedorn et al (2013).

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues... 243

Morphological terms were matched to concepts in the Hymenoptera Anatomy Ontol-
ogy (Yoder et al 2010) using the text analyzer function. A table of morphological terms
and URI links is provided in Suppl. material 1.

Taxonomic synopses and matrix-based descriptions were generated from the Hy-
menoptera Online Database (hol.osu.edu) and the online program vSysLab (vsyslab.
osu.edu) in the format of character: state.

Photographs were captured with a Z16 Leica®™ lens with a JVC KY-F75U digital
camera using Cartograph®™ software, or a Leica®*™ DMRB compound microscope with
a GT-Vision®™ Lw11057C-SCI digital camera attached. In both systems, lighting was
achieved using techniques summarized in Buffington et al. (2005), Kerr et al. (2009)
and Buffington and Gates (2009). Single montage images were produced from image
stacks with the program CombineZP*™. In some cases, multiple montage images were
stitched together in Photoshop® to produce larger images at high resolution and mag-
nification. Full resolution images are archived at the image database at The Ohio State
University (specimage.osu.edu).

Dissections for scanning electron microscopy were performed with a minuten
probe and forceps and body parts were mounted to a 12 mm slotted aluminum mount-
ing stub (EMS Cat. #75220) using a carbon adhesive tab (EMS Cat. #77825-12) and
sputter coated with approximately 70 nm of gold/palladium using a Cressington®™
108auto sputtercoater. Micrographs were captured using a Hitachi®™ TM3000 Table-
top Microscope at 15 keV.

Author contributions

EJT: photography, manuscript preparation, character analysis, taxonomy; NFJ: taxo-
nomic analysis, manuscript preparation; database development and maintenance;
MLB: manuscript preparation; DR: provision of specimen.

Collections

This work is based on specimens deposited in the following repositories with abbreviations
used in the text:

CASC California Academy of Science, San Francisco, USA

CCHH Hoffeins Collection, Hamburg, Germany

CNCI Canadian National Collection of Insects, Ottawa, Canada

CNU Key Lab of Insect Evolution and Environmental Changes, Capitol Normal
University, Shanghai, China

OSUC C.A. Triplehorn Collection, The Ohio State University, USA

USNM National Musem of Natural History, Washington, DC, USA

244 Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

Character annotations

IRs first abscissa of the radial sector vein (Figure 22)
2Rs second abscissa of the radial sector vein (Figure 22)
ama anterior mesepisternal area (Figures 8-10, 13, 15)
b bulla (Figures 5—6, 17)

bs basiconic sensillum (Figure 21)

eps _episternal foveae (Figure 9)

M median vein (Figure 22)

not _ notaulus (Figure 22)

occ _ occipital carina (Figure 22)

pes —_ postepomial sulcus (Figures 7, 9)

pshs _ pronotal suprahumeral sulcus (Figures 7, 9)

pss __ posterior scutellar sulcus (Figure 22)

pssu_ prespecular sulcus (Figure 7)

sasu. subacropleural sulcus (Figures 7—8)

tpc _ transverse pronotal carina (Figures 7, 9)

ts tibial spur (Figures 5, 16)

Results

Concept of Archaeoteleia

To evaluate the morphology of extant Archaeoteleia we examined 14 species directly:
(A. araucana Masner, A. chambersi Early, A. dispar Masner, A. gilbertae Early, A. karere
Early, A. mellea Masner, A. novazealandiae Masner, A. onamata Early, A. penai Masner,
A, puncticeps Masner, A. pygmea Masner, A. robusta Masner, A. simulans Masner and
A. submetallica Masner) in addition to the images presented in the revision by Early et
al. (2007).

We place A. astropulvis in Archaeoteleia based on the presence of 2 tibial spurs on
the metatibia, venation of the fore wing, the sulci along the anterior margins of T2—T4
and $2—S4, and the form of the anterior mesepisternal area. The distal apices of the
mesotibiae are not clearly visible and although we did not observe them directly, we
suspect that there are two mesotibial spurs as in all other Archaeoteleia.

The following characters presented by Early et al. (2007) can no longer be treated
as ubiquitous for Archaeoteleia: A3 the longest antennomere in females, episternal fo-
veae absent, and the number of mandibular teeth (2 teeth in extant species, 3 in A. as-
tropulvis). The characteristic shape of the clypeus in extant species was used by Early et
al. (2007) as a generic character. The clypeus in the holotype specimen of A. astropulvis
is obscured, precluding assessment of this character. However, based on the position of
the interantennal process relative to the mandibles, we assume that the clypeus is much
shorter than in extant species.

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues... 245

During the course of this study we encountered a male specimen in Baltic amber
(Figures 15-18) that we tentatively identify as Archaeoteleia. The observable morphol-
ogy is consistent with the concept of Archaeoteleia in Early et al. (2007), including
the wing venation (Figure 17) and the presence of two tibial spurs on the hind tibia
(Figure 16). Only the dorsal margin of the anterior mesepisternal area is clearly visible,
and it is carinate (Figure 15) as in other macropterous specimens of Archacoteleia. The
metasoma is entirely occluded by a hole drilled through the amber and the ventral por-
tion of the head is not visible. The description of Electroteleia Brues by Johnson et al.
(2008) states that this genus has tyloids on the male antennomeres A4—A8. ‘The speci-
men of Archaeoteleia illustrated in Figures 15-18 has a tyloid only on A5, consistent
with the description of Archaeoteleia by Early et al. (2007). Despite the incompleteness
of this specimen’s visible morphology, we consider it useful to bring attention to it
because other relevant specimens are likely present in Baltic amber collections and may
shed light on the evolution of Archaeoteleia.

Character discussion

Antenna

Figure 3 (A. mellea) illustrates a distinctly elongate A3, which is typical for extant
Archaeoteleia. However, even among extant species, this character exhibits significant
variation. Figure 4 illustrates the head and antennae of a female of A. pygmea: A3 is the
longest antennomere, but by a much smaller degree than in A. mellea and its length is
of the same order of magnitude as A2. Because of this plasticity, we do not use relative
antennomere length to exclude A. astropulvis, in which A3 is shorter than A2 and only
slightly longer than A4, from Archaeoteleia.

Wing Venation

The degree to which the marginal vein is sclerotized differs significantly between A.
astropulvis and from extant species and Archaeoteleia in Baltic amber (compare Figures

5—6, 17).

Anterior mesepisternal area

In all species of Archaeoteleia, the anterior mesepisternal area is elevated relative to
the surrounding mesopleuron and has carinate posterior margins. The posterodorsal
margin of the anterior mesepisternal area corresponds with anterior limit of either
the subacropleural sulcus or the prespecular sulcus. The posteroventral margin aligns
with the episternal foveae (when foveae are present). We examined this character in

246 Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

representatives of more than 100 platygastroid genera across all subfamilies and major
lineages and found that the anterior mesepisternal area is clearly delimited and present
as a raised area in only a handful of genera outside of Archaeoteleia: Cremastobaeus
Ashmead, Dyscritobaeus Perkins, Mecix Masner, Pseudanteris Fouts, Scelio Latreille,
Synoditella Muesebeck, Telenomus Haliday and Thoron Haliday. In none of these are
the posterior limits of the anterior mesepisternal area sharply margined by carinae as
in Archaeoteleia.

Sexual dimorphism

The anterior mesepisternal area in the micropterous females of Archaeoteleia pygmea
and apterous females of A. submetallica is a simple carina along the anterior margin of
the mesopleuron (Figure 14). In the macropterous males of A. pygmea (Figure 11) the
anterior mesepisternal area is fully developed in the form typical for the genus. The
episternal foveae are an attachment site for the mesopleuro-mesobasalare muscle (Mik6
et al. 2007), and thus it is unsurprising that microptery is associated with reduction in
this character. The nature of the musculature, if any, associated with the subacropleural
and prespecular sulci is presently unknown to us. We consider the form of the anterior
mesepisternal area to be a generic character for Archaeoteleia, albeit one that is subse-
quently modified in micropterous or apterous females.

Episternal foveae

Contrary to Early et al. (2007), conspicuous episternal foveae are commonly encoun-
tered in Archaeoteleia (Figure 9).

Pronotal shoulder

Some species of Archaeoteleia have two distinct sulci dorsal to the transverse pronotal
carina. When both sulci are present, we refer to the sulcus along the dorsal margin of
the pronotum as the pronotal suprahumeral sulcus, and the sulcus directly along the
dorsal margin of the transverse pronotal carina as the postepomial sulcus.

Archaeoteleia astropulvis Talamas, sp. n.
http://zoobank.org/870E09B4-7E5B-4074-BD5D-3A8C293F0227
http://bioguid.osu.edu/xbiod_concepts/407676

Figures 1-2, 5, 10

Description. Female body length: 1.62 mm (n=1).

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brue.... 247

Figure |. Archacoteleia astropulvis, female holotype (USNMENT01109982), habitus, ventrolateral view.

Scale bars in millimeters.

Head. Number of mandibular teeth: 3. Malar sulcus: present. Malar striae: present.
Facial striae: present. Lengths of flagellomeres: approximately equal to maximal width.
Number of clavomeres: 6. Frontal depression: absent. Hyperoccipital carina: absent.
Number of antennomeres: 12. Orbital carina: absent. Swelling along inner orbit of
compound eye: present. Occipital carina: absent below midpoint of compound eye.

Mesosoma. Netrion sulcus: complete, indicated by line of circular foveae. Prono-
tal cervical sulcus: indicated by deep circular foveae. Posterior pronotal sulcus: absent.
Sculpture of lateral pronotum: smooth in ventral half, weakly rugulose dorsally. Trans-
verse pronotal carina: present. Epomial carina: absent. Transverse pronotal carina: pre-
sent. Setation of lateral axillar region: absent. Macrosculpture of mesoscutum: absent.
Notaulus: percurrent. Macrosculpture of mesoscutellum: absent. Spines on mesoscu-
tellar disc: absent. Mesepimeral sulcus: extending along length of posterior margin of
mesopleuron, dorsally continuous with cells of prespecular sulcus. Episternal foveae:
present, extending from acetabular carina to base of mesopleural carina. Postacetabular
sulcus: present as a smooth furrow. Prespecular sulcus: indicated by shallow crenulae
extending posteriorly from anterior mesepisternal area. Anterior mesepisternal area:
present. Sculpture of mesopleuron below femoral depression: smooth. Sculpture of
femoral depression: smooth. Mesopleural carina: present anteriorly, effaced posteriorly.

248 Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

Figure 2. Archacoteleia astropulvis, female holotype (USNMENT01109982), habitus, dorsolateral view.

Scale bars in millimeters.

Paracoxal sulcus: indicated by line of foveae. Sculpture of dorsal metapleuron:
smooth.

Posterior projection of the propodeum: present, visible only in lateral view due to
bubble in amber. Length of postmarginal vein: about 2.7 times as long as stigmal vein.
Length of marginal vein: about equal to length of stigmal vein. Bristles on submarginal
vein in fore wing: absent. Basal vein in fore wing: present as a nebulous line. Bulla: present.

Metasoma. Felt fields on S2: absent. Sculpture of S2-S5: smooth posterior to
cells of antecostal suture. Sculpture of T2—-T5: smooth posterior to cells of antecostal
suture. Horn on T1: present. Antecostal sutures on sternites: indicated by large cells on
S2-S4. Antecostal sutures on tergites: indicated by cells on anterior T2—T4.

Diagnosis. Archacoteleia astropulvis can be separated from females of extant spe-
cies by multiple characters. A2 and A3 are distinctly elongate in extant species (Figures
3-4) and in A. astropulvis the length of these antennomeres is approximately equal to
their width. The mandibles are bidentate in extant species and tridentate in A. astropul-
vis. Lastly, in extant macropterous species, the marginal vein is thickly sclerotized into
a “stigma” whereas in A. astropulvis the marginal vein is simple.

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues... 249

Figures 3-6. 3 Archacoteleia mellea, female (OSUC 203348), head and antennae, anterior view 4 A. pyg-
mea, female (146602), head and antennae, anterior view 5 Archaeoteleia astropulvis, female holotype (US-
NMENT01109982), fore wing and metatibia, dorsal view 6 Archaeoteleia gracilis, male (OSUC 163002),

fore wing venation. Scale bars in millimeters.

Etymology. This species epithet “astropulvis” is a Latin translation of “star dust”,
that refers to the ancient source of the atoms that form our planet and its inhabitants
and commemorates the late David Bowie alter ego, Ziggy Stardust. It is treated as a
noun in apposition.

Link to distribution map. http://hol.osu.edu/map-large.html?id=407676

Material examined. Holotype, female: MYANMAR: CNU-HYM-MA-2014014
(USNMENT01109982) (deposited in CNU).

250 Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

Figures 7-10. 7 Archacoteleia gracilis, male (OSUC 163002), mesosoma, lateral view 8 Archaeoteleia

gracilis, male (OSUC 163002), pronotum and mesopleuron, posterolateral view 9 Archaeoteleia araucana,
male paratype (OSUC 163001), head, mesosoma, metasoma, lateral view 10 Archaeoteleia astropulvis,

head, mesosoma, metasoma, lateral view. Scale bars in millimeters.

Comments. Masner (1968) suggested that the evolutionary origin of Archaeoteleia
might have been Antarctic in origin, consistent with the distribution of extant species
and the absence of fossil evidence of Archaeoteleia from other regions. The discovery of
A, astropulvis from Myanmar and the presence of Archaeoteleia in Baltic amber indicate
that the distribution of the genus was once found much farther north. We posit that
Archaeoteleia in South America and New Zealand represent relictual populations of a
once expansive distribution.

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues... 2

Figures | 1-14. Archaeoteleia pygmea \\ male (OSUC 203907), habitus, lateral view 12 female (OSUC

146602), habitus, lateral view 13 male (OSUC 203907), mesopleuron, lateral view 14 female (OSUC
146602). Scale bars in millimeters.

Diagnosis of Proteroscelio

Proteroscelio can be identified by the following combination of characters: antennae
14-merous; clava in female antenna 8-merous and with pairs of basiconic sensilla ar-
ranged longitudinally; wings fully developed; 1Rs and M not intersecting in forewing.

Diagnosis of Proterosceliopsis

Proteroscelio nexus partially matches the diagnosis of Proterosceliopsis provided in Orte-
ga-Blanco et al. (2014): 1Rs and M do not intersect, notauli are present and T1 is
longitudinally striate. Their diagnosis stated that Proterosceliopsis has 6 visible tergites
and a short, wide ovipositor. Based on the drawing and photograph of Proterosceliopsis
masneri provided by Ortega-Blanco et al. (2014) (Figures 1, 6A) we offer an alternative
interpretation, that the metasoma has 6 externally visible tergites and the apex is the
partially extruded fusion of T7+8, as is found in scelionines with a Scelio-type oviposi-
tor. In lieu of P nexus, Proterosceliopsis can be differentiated from Proteroscelio by the
fore wing not extending to the apex of the metasoma, a strongly transverse mesoscutel-
lum and the presence of a horn on T1.

252 Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

| o. aN — |
a ae! Ce
Figures 15-18. Archacoteleia sp., male (USNMENT01223663) 15 mesopleuron, dorsolateral view

16 distal apex of metatibia, lateral view 17 fore winge venation, dorsal view 18 head and mesosoma,
dorsolateral view. Scale bars in millimeters.

Diagnosis of Bruescelio

Ortega-Blanco et al. (2014) diagnosed Bruescelio on the basis of an antero-posteriorly
compact shape of the head, a 6-merous clava, the absence of an occipital carina, 1Rs
intersecting M in the fore wing. and T2 as the longest tergite. Proteroscelio nexus has
T2 as the longest tergite (Figure 22), rendering this character unusable. The use of
claval formula by Ortega-Blanco et al. (2014) for generic level diagnosis is potentially
problematic because these authors did not clarify their criterion for differentiating

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues... 253

between clavomeres and the funicle. In Proteroscelio antennalis and P gravatus the size
difference is sufficiently extreme that differentiating between clavomere and non-cla-
vomere is straightforward. However, in P nexus, the flagellomeres beyond A3 expand
in size gradually (Figures 19-21), and thus explicit definition of clavomeres increases
in importance. Proteroscelio antennalis and P gravatus have compressed heads and P
nexus does not, obviating use of this character. Assuming that the clava in Bruescelio is
6-merous based on basiconic sensilla, Bruescelio can be separated from Proteroscelio by
the following characters: clava 6-merous; occipital carina absent; 1Rs and M intersect-
ing in the fore wing.

Key to Cretaceous platygastroid genera with 14-merous antennae (females)

1 SEIS SAID SEE tia Aston e deen cede sn taahon de toatedaadevette tes Geoscelio Engel & Huang
— WANS TOSI ead ere vgs sateen cee erestreseeree vay sna satepaines enon betes ti preve Monenes det rees eseotataee 2
2 Fore wing not extending posteriorly to apex of metasoma; metasoma with

hotn2one Vel oi.c...tesve0es Proterosceliopsis Ortega-Blanco, McKellar & Engel
- Fore wing extending posteriorly at least to apex of metasoma; metasoma

SCA RALGTOG CH IVG! AA trOe VO0) lll oes O-E iy clans PO es NRE rel, COME he Ob Mena ARS na GOR 3
3 IRs intersecting M in fore wing; clava 6-MeLrouS..........ceesesecseeeeseeseseeeeneeeees

ssa aaa rele Dy na erase ake Debit Bruescelio Ortega-Blanco, McKellar & Engel

= 1Rs not intersecting M in fore wing; clava 8-merous .....Proteroscelio Brues

Character discussion

The monotypic Proterosceliopsis and Bruescelio were differentiated by Ortega-Blanco
et al. (2014) from each other and from Proteroscelio based on characters that are com-
monly variable within extant genera: claval formula, sculpture of T1, presence of an
occipital carina, head shape, length of wings, and the presence of a posterior scutellar
sulcus (referred to as “posterior mesoscutellar pits.”). We here provide perspective
on some of these characters based on experience with a broad range of platygastroid
genera.

Wing Venation

Ortega-Blanco et al. (2014) used the abbreviations 2Rs and 3Rs for abscissae of the
radial sector vein (Rs) in the fore wing. However, none of the taxa treated by them ex-
hibit three abscissae in Rs, and thus these should be treated as 1 Rs and 2Rs respectively.
Our naming convention for these veins follows that of Ross (1937), Goulet and Huber

(1993), and Dangerfiel et al. (2001).

254 Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

Wing length

The length of the fore wing relative to the metasoma is often a consequence of meta-
somal length. Figures 24-25 and 26-27 illustrate two species of Triteleia Kiefer and
two species of Trichoteleia Kieffer, respectively, in which the ratio of wing length to
mesosomal length changes very little despite changes in the length of the metasoma.
The shape of the body in scelionids is thought to be influenced by the shape of the egg
in which the parasitoid develops; species that develop in elongate eggs tend to have
an elongate habitus and species that develop in globular eggs tend to have a compact
habitus. Furthermore, several characters are allometrically linked to body size, which is
a direct function of host size and quality (Bufhington and Polaszek 2009). Dramatically
different adult parasitoid morphologies, within a population, can result from develop-
ment within hosts of varying size or quality. Consequently, the length of the wing
relative to the metasoma is a highly plastic character that is indicative of ancestry only
to the degree that host choice is.

Mesoscutal pits

This term is unknown to us. It is not found in the Hymenoptera Anatomy Ontology
nor is it used in platygastroid literature known to us and we deduce that Ortega-Blanco
et al. (2014) were referring to the posterior scutellar sulcus (Figure 22), which is indi-
cated by cells in almost all Scelionidae.

Horn on T1

The presence of a horn on T1 is often highly variable within genera (e.g. /dris Forster,
Inostemma Haliday, Probaryconus Kieffer), and even within a species (e.g. Trichoteleia
janus Talamas). We consider its use as a generic character to be reasonable only when
supported by congruence with other characters.

Metasomal sculpture

The value of metasomal sculpture as a generic character is an extreme rarity in Plat-
ygastroidea and we know of only one instance where metasomal sculpture has real di-
agnostic power at the generic level: T3 in Dvivarnus Rajmohana & Veenakumari. The
presence of striation on T1 is of little use at the generic level because the vast majority
of platygastroids have T1 longitudinally striate to some degree, and within a genus
there may be closely related species that differ by this character.

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues... 955

ae _

Figures 19-21. Proteroscelio nexus, female holotype (USNMENT01197245) 19 head and mesosoma,

lateral view 20 head and mesosoma, anterolateral view 21 antenna, ventral view. Scale bars in millimeters.

Proteroscelio nexus Talamas, sp. n.
http://zoobank.org/278008AB-A3 DF-4143-923E-A04D5C172C1A
http://bioguid.osu.edu/xbiod_concepts/407637

Figures 19—23

Description. Female body length: 1.50 mm (n=1).

Head. Hyperoccipital carina: absent. Number of antennomeres: 14. Facial striae:
absent. Frontal depression: absent. Malar sulcus: absent. Orbital carina: absent. Num-
ber of clavomeres: 8. Lengths of flagellomeres: approximately equal to maximal width,
except Al4 distinctly longer than wide. Swelling along inner orbit of compound eye:
absent. Anterior margin of occipital carina: crenulate. Occipital carina: present.

Mesosoma. Pronotal suprahumeral sulcus: indicated by lines of cells. Transverse
pronotal carina: present. Setation of lateral axillar region: absent. Notaulus: percurrent.

Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

Figure 22. Proteroscelio nexus, female holotype (USNMENT01197245) habitus, dorsal. Scale bar in

millimeters.

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues... 257

Figure 23. Proteroscelio nexus, female holotype (USNMENT01197245) habitus, ventral. Scale bar in

millimeters.

258 Elijah J. Talamas et al. / Journal of Hymenoptera Research 56: 241-261 (2016)

Figure 24-27. 24 Triteleia sp., female (OSUC 225498), dorsal view 25 Triteleia sp., female (OSUC
334149), dorsal view 26 Trichoteleia hemlyae (CASENT 2132833), female holotype, dorsal view 27 Tri-
choteleia carinata (USNMENT01109593), female, dorsal view. Scale bars in millimeters.

Macrosculpture of mesoscutellum: absent. Spines on mesoscutellar disc: absent.
Metascutellum: differentiated from metanotal trough by line of 4 foveae directly poste-
rior to mesoscutellum. Mesepimeral sulcus: present. Sculpture of dorsal metapleuron:
transversely rugose. Posterior projection of the propodeum: present.

Metasoma. Sculpture of T2—T5: smooth posterior to foveae of antecostal suture.
Horn on T1: absent. Antecostal sutures on sternites: externally indicated only on S2
as a line of costae. Antecostal sutures on tergites: indicated by cells on anterior T2—T4,
T5 dubious.

Length of postmarginal vein: about equal to length of stigmal vein. Length of mar-
ginal vein: about equal to length of stigmal vein. Bristles on submarginal vein in fore
wing: absent. Basal vein in fore wing: present. Bulla: present.

Diagnosis. Proteroscelio nexus is identifiable by the combination of strongly trans-
verse [3—T5, percurrent notauli, and the serrate form of the clavomeres.

Etymology. This species is given the name “nexus”, derived from the Latin word
for to “tie” or “bind” because this species shares characters between Proteroscelio and

Archaeoteleia Masner in the Cretaceous and a new species of Proteroscelio Brues... 259

the previous concepts of Proterosceliopsis and Bruescelio, bringing these three genera
closer together morphologically.
Link to distribution map. http://hol.osu.edu/map-large.html?id=407637
Material examined. Holotype, female: MYANMAR: CNU-HYM-MA-2014013
(USNMENT01197245) (deposited in CNU).

Key to species of Proteroscelio (females)

1 A3-A5 short, wider than long; clava not serrate in lateral view ............ eee

WA hs Pe odes WU, Bale si gree lee P. gravatus Johnson, Musetti & Masner
= A3-A5 elongate, longer than wide; clava serrate in lateral view... 2
2 Head strongly transverse, metasomal segments 2—5 roughly equal in length...

Me Do dapbecshie tite te lasing Mes los, Sandton tesco stile acai eae P. antennalis Brues
- Head globular, metasomal segment 2 distinctly longer than segments 3-5 ...
Highest esa tee eG We ee whieh con uitck Ou edu ee Se been eee Teese eae P. nexus Talamas

Acknowledgments

We extend our thanks to Longfeng Li for bringing the specimens to our attention,
without which this publication simply would not have existed, and Mr. Jun Li (Shop-
keeper of Huxuan Store, Jinan, Shandong) for donating the specimens to the Key
Lab of Insect Evolution and Environmental Change. We also extend our thanks to
Lubomir Masner (CNCI) for hosting a visit by the first author during which extant
Archaeoteleia were examined, and to Christel Hoffeins (CCHH) for a loan of Baltic
amber. Dong Ren was supported by the National Natural Science Foundation of Chi-
na (No.31230065, 31672323), Program for Changjiang Scholars and Innovative Re-
search Team in University (IRT13081). This work was made possible by funding from
the Systematic Entomology Laboratory (USDA-ARS), the Beneficial Insect Introduc-
tion Research Unit (USDA-ARS), and the National Institute of Food and Agriculture—
Specialty Crop Research Initiative (USDA—NIFA-SCRI) #2011-51181-30937. The
USDA does not endorse any commercial product mentioned in this research. USDA
is an equal opportunity provider and employer.

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Supplementary material |

URI table of HAO morphological terms

Authors: Elijah J. Talamas, Norman E Johnson, Matthew Buffington, Dong Ren

Data type: Microsoft Excel Spreadsheet (-xls)

Explanation note: This table lists the morphological terms used in this publication and

their associated concepts in the Hymenoptera Anatomy Ontology.

Copyright notice: This dataset is made available under the Open Database License
(http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License
(ODDbL) is a license agreement intended to allow users to freely share, modify, and
use this Dataset while maintaining this same freedom for others, provided that the
original source and author(s) are credited.