Biodiversity Data Journal 11: e98935 CO) 
doi: 10.3897/BDJ.11.e98935 open access 
Taxonomy & Inventories 

Disclisioprocta edmondsii (Butler, 1882) comb. 
nov. (Lepidoptera, Geometridae, Larentiinae) 

Héctor A. Vargas + 

$+ Universidad de Tarapaca, Facultad de Ciencias Agronomicas, Departamento de Recursos Ambientales, Arica, Chile 

Corresponding author: Héctor A. Vargas (lepvargas@gmail.com) 
Academic editor: Shinichi Nakahara 
Received: 16 Dec 2022 | Accepted: 04 Jan 2023 | Published: 11 Jan 2023 

Citation: Vargas HA (2023) Disclisioprocta edmondsii (Butler, 1882) comb. nov. (Lepidoptera, Geometridae, 
Larentiinae). Biodiversity Data Journal 11: €98935. https://doi.org/10.3897/BDJ.11.e98935 

Abstract 

Background 

The generic assignment of the geometrid moth Xanthorhoe edmondsii (Butler, 1882) 
(Lepidoptera, Geometridae, Larentiinae), originally described under Hypochroma Guenée, 
[1858], a junior homonym of Hypochroma Herrich-Schdaffer, [1855] (Geometridae, 
Ennominae), is assessed using genitalia morphology and analysis of mitochondrial DNA 
sequences. 

New information 

Morphological characters revealed closeness to the type species of Disclisioprocta 
Wallengren, 1861 (Larentiinae). In agreement with morphology, the molecular analysis 
clustered X. edmondsii with species of Disclisioprocta in a well-supported monophyletic 
group distantly related to members of Xanthorhoe Hubner, [1825]. Accordingly, 
Disclisioprocta edmondsii (Butler, 1882) comb. nov. is proposed. 

© Vargas H. 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. 


2 Vargas H 

Keywords 

DNA barcoding, genitalia morphology, geometrid moths, Neotropical 

Introduction 

Natural environments of South America harbour a high diversity of geometrid moths 
(Lepidoptera, Geometridae), whose taxonomy remains insufficiently studied (Hausmann 
and Parra 2009, Brehm et al. 2016, Murillo-Ramos et al. 2021). Besides the frequent 
discovery of new species (Brehm 2018, Ramos-Gonzalez et al. 2019, Moraes et al. 2021, 
Vargas 2021), generic assignments of most of the already described species deserve 
assessment, as suggested by new combinations arising in taxonomic revisions (Parra 
2018) and molecular phylogenetic analyses (Brehm et al. 2019). 

The geometrid moth Xanthorhoe edmondsii (Butler, 1882) (Geometridae, Larentiinae) is 
known from Chile and Argentina (Butler 1882, Chalup 2014). It was originally described 
under Hypochroma Guenée, [1858], a junior homonym of Hypochroma Herrich-Schéaffer, 
[1855] (Geometridae, Ennominae) (Parsons et al. 1999). Individuals from northern Chile 
reared from larvae collected on the ornamental plant Bougainvillea glabra Choisy 
(Nyctaginaceae) were misidentified as Chrismopteryx undularia (Blanchard, 1852), based 
on comparison with material from central Chile deposited in the Museo Nacional de 
Historia Natural de Santiago (Vargas et al. 2010). Subsequent comparison with a photo of 
the type material deposited in the Natural History Museum, London, UK, allowed 
concluding that the specimens examined by Vargas et al. (2010) belong to X. edmondsii. 

Morphological characters of the genitalia of geometrid moths are extremely useful in 
generic assignments (Pitkin 2002, Parra 2018, Viidalepp and Lindt 2019), which can be 
reinforced by phylogenetic analysis of DNA sequences (Brehm et al. 2019, Matson 2022, 
Wanke et al. 2022). An examination of the genitalia of X. edmondsii revealed remarkable 
morphological differences with Xanthorhoe montanata ([Denis & Schiffermuller], 1775), the 
type species of Xanthorhoe Hubner, [1825], suggesting instead closeness with 
Disclisioprocta stellata (Guenée, [1858]), the type species of Disclisioprocta Wallengren, 
1861. The aim of this study is to propose a new generic assignment for xX. edmondsil, 
based on genitalia morphology and analysis of mitochondrial DNA sequences. 

Materials and methods 

Specimens examined in this study were collected at light or reared from larvae collected on 
B. glabra in the Azapa Valley (18°31'16”S, 70°10’42’W), Arica Province, northern Chile. 
Photos of the genitalia were taken with a Leica Flexacam C1 digital camera attached to a 
Leica M125 stereomicroscope. Each image was constructed with about 5—10 photos 
assembled with the software Helicon Focus 8. The specimens of xX. edmondsii are 
deposited in the “Coleccion Entomologica de la Universidad de Tarapaca’” (IDEA), Arica, 


Disclisioprocta edmondsii (Butler, 1882) comb. nov. (Lepidoptera, Geometridae, ... 3 

Chile. The specimens of D. stellata are deposited in the “Colegao Pe. Jesus de Santiago 
Moure (DZUP)”, Universidade Federal do Parana, Curitiba, Parana, Brazil. 

Genomic DNA was extracted from two legs of a male adult using the QlAamp Fast DNA 
Tissue Kit, following the manufacturer’s instructions. DNA purification, PCR amplification 
and sequencing of the barcode region (Hebert et al. 2003) with the primers LCO1490 and 
HCO2198 (Folmer et al. 1994) were performed at Macrogen Inc. (Seoul, South Korea). 
The PCR programme was 5 min at 94°C, 35 cycles of 30 s at 94°C, 30 s at 47°C, 1 min at 
72°C and a final elongation step of 10 min at 72°C. Analysis of this mitochondrial marker 
represents a helpful tool in generic assignments of Lepidoptera, including Geometridae 
(Wanke et al. 2019, Wanke et al. 2022, Vargas et al. 2022). The sequence of X. edmondsii 
was submitted to a Maximum Likelihood (ML) analysis with additional representatives of 
Larentiinae downloaded from BOLD (Ratnasingham and Hebert 2007), following the 
Classification provided by Brehm et al. (2019) in which Disclisioprocta belongs to an 
unnamed clade sister to Euphyiini. The alignment included sequences of Euphyia Hubner, 
[1825] and Oligopleura Herrich-Schéaffer, [1855] as representatives of this tribe, sequences 
of Xanthorhoe due to the current generic adscription of X. edmondsii (Parsons et al. 1999) 
and sequences of Scotopteryx Hubner, [1825] as outgroups. The software MEGA11 
(Tamura et al. 2021) was used to perform sequence alignment with the ClustalW method 
and to determine genetic distance using the Kimura 2-Parameter (K2P) method. Before the 
ML analysis, the substitution saturation of the alignment was assessed with the Xia test, 
using the software DAMBE7 (Xia 2018). The ML analysis was performed using the 
software IQTREE 1.6.12 (Nguyen et al. 2014) in the web interface W-IQ-TREE 
(Trifinopoulos et al. 2016) with data partitioned to codon _ position. ModelFinder 
(Kalyaanamoorthy et al. 2017) selected TNe+l, F81+F and TN+F+G4 as the best fit models 
for 1st, 2nd and 3rd partitions, respectively. Branch support was assessed with 1000 
replications of the Shimodaira-Hasegawa-like approximate likelihood ratio test (SH-aLRT, 
Guindon et al. (2010)) and ultrafast bootstrap (UFBoot, Hoang et al. (2017)). The unrooted 
tree was visualised in FigTree (Rambaut 2014) to root on Scotopteryx. 

Taxon treatment 

Disclisioprocta edmondsii (Butler, 1882) comb. nov. 

Nomenclature 

Hypochroma edmondsii Butler, 1882, p. 364. Angulo and Casanueva (1981), p. 21. 
Xanthorhoe edmondsii (Butler, 1882): Parsons et al. (1999), p. 964. 

Chrismopteryx undularia (Blanchard, 1852): Vargas et al. (2010), misidentification. 

Materials 

a. scientificName: Disclisioprocta edmondsii (Butler, 1882); higherClassification: 
Insecta;Lepidoptera;Geometridae;Larentiinae; continent: South America; country: Chile; 


Vargas H 

stateProvince: Arica; locality: Azapa Valley; decimalLatitude: -18.52; decimalLongitude: 
-70.18; samplingProtoco!: Two males, three females emerged February 2006, reared fom 
larvae collected on Bougainvillea glabra January 2006; individualCount: 5; identifiedBy: 
Héctor A. Vargas; identificationRemarks: Genitalia slides HAV-1281, 1284, 1286, 1583, 
1584; type: PhysicalObject; language: en; institutionCode: "Coleccién Entomoldgica de la 
Universidad de Tarapaca" (IDEA); basisOfRecord: "PreservedSpecimen"; occurrence!D: 
99F2E982-F CB8-5F F0-B368-3F 12C8EFFOA6 

b. scientificName: Disclisioprocta edmondsii (Butler, 1882); higherClassification: 
Insecta;Lepidoptera;Geometridae;Larentiinae; continent: South America; country: Chile; 
stateProvince: Arica; locality: Azapa Valley; decimalLatitude: -18.52; decimalLongitude: 
-70.18; samplingProtoco!: Two males, one female September 2006 at light; 
individualCount: 3; identifiedBy: Héctor A. Vargas; identificationRemarks: Genitalia slides 
HAV-1283, 1285, 1287; type: PhysicalObject; language: en; institutionCode: "Coleccién 
Entomoldgica de la Universidad de Tarapaca” (IDEA); basisOfRecord: 
"PreservedSpecimen"; occurrence!D: 591A91A6-F832-5EFC-85C4-F03775D0D824 

C. scientificName: Disclisioprocta edmondsii (Butler, 1882); higherClassification: 
Insecta;Lepidoptera;Geometridae;Larentiinae; continent: South America; country: Chile; 
stateProvince: Arica; locality: Azapa Valley; decimalLatitude: -18.52; decimalLongitude: 
-70.18; samplingProtoco!: One male May 2022 at light; individualCount: 1; 
associatedSequences: BOLD Process ID GEONC001-22; identifiedBy: Héctor A. Vargas; 
identificationRemarks: Genitalia slide HAV-1580; type: PhysicalObject; language: en; 
institutionCode: "Coleccién Entomoldgica de la Universidad de Tarapaca" (IDEA); 
basisOfRecord: "PreservedSpecimen"; occurrencelD: 
6C800146-205F-5AA7-85A5-4470D74F CA88 

Description 

Male habitus in Fig. 1. Although the male abdominal segments VII and VIII are not part 
of the genitalia, these are described here and illustrated because the morphology of the 
sclerites of these segments can be modified in different groups of Larentiinae 
(Viidalepp 2011). 

Figure 1. EESl 

Male adult of Disclisioprocta edmondsii (Butler, 1882) comb. nov., dorsal view. Scale bar 10 
mm. 


Disclisioprocta edmondsii (Butler, 1882) comb. nov. (Lepidoptera, Geometridae, ... 5 

Male abdominal segments VII and VIII (Fig. 2). Segment VII mostly membranous; 
tergum a transverse stripe strongly posteriorly folded in the middle; sternum a 
transverse stripe; pleura with pair of coremata. Segment VIII mostly membranous; 
tergum an anterior transverse stripe with semicircular expansion on tips, connected by 
a short longitudinal stripe with a posterior rectangular transverse plate; sternum an 
anterior transverse stripe posteriorly curved in the middle, projected as a narrow 
longitudinal stripe posteriorly bifid, triangular expansion near tip of the anterior 
transverse stripe. 

Figure 2. EESl 

Male abdominal segments VII and VIII of Disclisioprocta edmondsii (Butler, 1882) comb. nov. 
A) Coremata (stars) of segment VII and sclerites of segments VII (closed arrows) and VIII 
(open arrows); terga on left, sterna on right. B) Segments VII and VIII showing right corema of 
segment VII expanded. Scale bar 1 mm. 

Male genitalia (Fig. 3). Uncus bifid with broad posterior concavity in the middle, 
truncate points slightly down-curved. Saccus with small rounded anterior projection. 
Subscaphium slightly sclerotised. Labides with lobe-like tip bearing setae. Manica 
heavily spinose. Juxta trapezoidal, ventral half of lateral margin broadly concave, 
ventral margin broadly concave. Valva elongated; costal sclerotised band not reaching 
apex; cucullus mostly membranous on distal half with abundant setae; sacculus broad, 
well-sclerotised; sacculus projection stout, apex almost reaches that of the distal 
margin of the cucullus, with a broader, dorsally projected basal process. Phallus 
cylindrical, anterior half straight, posterior half curved, with a small spine-like projection 
ventrally on posterior tip; vesica mostly membranous with a plate-like cornutus. 

Female genitalia (Fig. 3). Papillae anales membranous, lobe-like, fused dorsally, 
posterior edge with setae on dorsal and lateral parts and elongated, flattened scales on 
ventral part. Apophyses posteriores rod-shaped, narrow, slightly longer than apophyses 
anteriores. Antrum_ well-sclerotised, flattened, ventrally curved in the middle, 
progressively straightening anteriorly. Ductus bursae membranous, about 2/3 length of 
the antrum. Corpus bursae membranous, spherical, with 5-7 stout spine-like signa 
arising ventrally from the anterior margin of a semicircular slightly sclerotised plate. 
Ductus seminalis arising near the posterior tip of ductus bursae. 


6 Vargas H 

Figure 3. EESl 

Genitalia of Disclisioprocta edmondsii (Butler, 1882) comb. nov. A) Male genitalia, phallus 
removed. B) Phallus. C) Female genitalia. Scale bar 1 mm. 

Molecular analysis 

Genetic distance of D. edmondsii (BOLD accession GEONC001-22) was 10.3-10.5% 
(K2P) with D. natalata and 11.0-11.5% with D. stellata, while the distance between the 
latter two was 6.2—7.1%. The alignment was suitable for phylogenetic analysis, as no 
evidence of stop codons was detected and the index of substitution saturation was 
smaller than the critical value (ISS < ISS.C; p < 0.001) in the Xia test. The ML analysis 
(Fig. 4) clustered (D. edmondsii (D. natalata + D. stellata)) with high support. Although 
each genus had reasonable statistical support in the ML analysis, relationships 
between genera were not resolved. 

Discussion 

Although the identification of synapomorphies for Disclisioprocta deserves further 
assessments based on better knowledge of the morphology of related genera, the 
morphological similarities between the genitalia of D. edmondsii (Fig. 3) and D. stellata 
(Fig. 5) provide support to consider them as congenerics. The two species have uncus 
bifid, costal sclerotised band not reaching apex of the cucullus, a stout sacculus projection 
and a plate-like cornutus in the male and a flattened elongated antrum and a cluster of 
elongated spine-like signa arising from a plate on the corpus bursae in the female. The 
same morphological characters support the removal of D. edmondsii from Xanthorhoe. The 
type species of this genus has an elongated rod-like uncus, costa as a sclerotised free arm 


Disclisioprocta edmondsii (Butler, 1882) comb. nov. (Lepidoptera, Geometridae, ... 7 

extending beyond the cucullus apex, sacculus lacking a projection and numerous spine- 
like cornuti in the male and a short antrum and two elongated plate-like signa with small 
spines in the female (Exposito-Hermosa and Viidalepp 2011). 

LPABC353-09 Xanthorhoe decoloraria 
92h92 ABOLB838-15 Xanthorhoe montanata* 
BLPAG888-07 Oligopleura aulaeata 
S494 95/98 BLPAA16771-20 Oligopleura malachitaria* 
CGUKD321-09 Euphyia unangulata 
= 94/93 CGUKA838-09 Euphyia biangulata* 
GEONC001-22 Disclisioprocta edmondsii comb. nov. 
— GWOSI504-10 Disclisioprocta natalata 
GWOTF283-12 Disclisioprocta natalata 
98/98 29/43 
ae GWOSI505-10 Disclisioprocta natalata 
LNAUT1369-14 Disclisioprocta natalata 
96/92 LOCBF4245-14 Disclisioprocta stellata* 
100/100 | LOCBF 4249-14 Disclisioprocta stellata* 
te LOCBF2619-13 Disclisioprocta stellata* 
LOCBF2651-13 Disclisioprocta stellata* 
GWOSB291-10 Scotopteryx coarctaria* 

94/94 GWORA2583-09 Scotopteryx angularia 

0.05 

Figure 4. ETSI 

Maximum Likelihood tree of Disclisioprocta edmondsii (Butler, 1882) comb. nov. (bold) and 
representatives of the lEuphyiini + Xanthorhoini complex of Larentiinae, based on 
mitochondrial DNA sequences. Grey rectangle indicates Disclisioprocta Wallengren, 1861. 
Asterisks indicate type species. Numbers indicate SH-aLRT/UFBoot values (1000 replicates). 

The result of the ML analysis is congruent with the genitalia morphology, since D. 
edmondsii clustered with two other representatives of Disclisioprocta in a well-supported 
clade, distantly related to members of Xanthorhoe (Fig. 4). The grouping of D. stellata and 
D. natalata as sister species agrees with the already highlighted remarkable morphological 
similarity of their genitalia (Hausmann 2009). The genetic distances of D. edmondsii with 
D. natalata and D. stellata seem higher than commonly reported for other Larentiinae 
genera (Stadie et al. 2014, Wanke et al. 2019, Guerrero et al. 2022). However, sequences 
deposited in BOLD (Ratnasingham and Hebert 2007) suggest that Disclisioprocta harbours 
several more species than the three recognised until recently (Parsons et al. 1999). 
Accordingly, it is highly probable that, with an improvement in the knowledge of the 
taxonomic diversity of Disclisioprocta, the genetic distance of D. edmondsii to other 
congenerics would be smaller. Alternatively, further studies could reveal D. edmondsii as a 
member of another, either described or undescribed, lineage of generic level, sister to 
Disclisioprocta. In the meantime, its placement in this genus seems a better solution than 
its previous adscription to Xanthorhoe, in spite the deep genetic distance with congenerics. 


8 Vargas H 

Figure 5. EES] 

Genitalia of Disclisioprocta stellata (Guenée, [1858]) from Brazil. A Male genitalia, phallus 
removed; B Phallus; C Female genitalia. Scale bar 1 mm. 

Recent molecular phylogenetic analyses clustered Disclisioprocta with the Neotropical 
Ptychorrhoe Warren, 1900 in a clade sister to Euphyiini (Brehm et al. 2019, Murillo-Ramos 
et al. 2019). Unfortunately, the genitalia of Ptychorrhoe remain unknown, impeding 
comparisons with D. edmondsii. Further morphological and molecular phylogenetic studies 
involving members of the Euphyiini + Xanthorhoini complex (Brehm et al. 2019) are 
encouraged to determine the circumscription of the genera, identifying their synapomorpies 
and improving the current understanding of the evolution of Larentiinae. 

Acknowledgements 

| would like to thank Axel Hausmann for providing helpful comments and suggestions on a 
previous version of the manuscript, Olaf H. H. Mielke for the loan of the R. affirmata 
abdomens for dissection, Luis E. Parra for sharing a photo of the type material of D. 
edmondsii and Lafayette Eaton for checking the English. 

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