Research Article

Journal of Orthoptera Research 2022, 31(1): 83-89

Description of two new species of Turanogryllini crickets (Orthoptera, Gryllidae,
Gryllinae) from Cameroon, with identification keys for African species

PHILENE CORINNE AUDE Um Nyose!, TONY ROBILLARD2, SEVILOR KEKEUNOU!, LIBIN MA3,

MIARCELLE MBADJOUN Nzike!, CHARLES FELIX BILONG BILONG!

1 University of Yaounde 1, Faculty of Science, Department of Animal Biology and Physiology, Cameroon.
2 Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum national d'Histoire naturelle, CNRS, SU, EPHE, UA, 57 rue Cuvier, CP 50, 75231

Paris Cedex 05, France.

3 College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, 710119, China.

Corresponding author: Philene Corinne Aude Um Nyobe (phicoraude@yahoo.fr)

Academic editor: Maria-Marta Cigliano | Received 23 August 2021 | Accepted 25 November 2021 | Published 1 June 2022

http://zoobank.org/4A9BAEB 1-2 BDB-48DC-9F54-34210B51FE57

Citation: Um Nyobe PCA, Robillard T, Kekeunou S, Ma L, Mbadjoun Nzike M, Bilong Bilong CF (2022) Description of two new species of Turanogryllini
crickets (Orthoptera, Gryllidae, Gryllinae) from Cameroon, with identification keys for African species. Journal of Orthoptera Research 31(1): 83-89.

https://doi.org/10.3897/jor.31.73389

Abstract

During a Gryllidae survey in the Southern Cameroonian Plateau,
two new species of the tribe Turanogryllini Otte, 1987 were discovered
and described, namely Turanogryllus zamakoensis Um Nyobe, Kekeunou &
Bilong Bilong sp. nov. and Neogryllopsis gorochovi Um Nyobe, Kekeunou
& Ma sp. nov. This finding extends the known distribution of the
genera Turanogryllus Tarbinsky, 1940 and Neogryllopsis Otte, 1983. New
environments are also recorded for these crickets, and an identification
key for African species is proposed for these two genera.

Résumé

Au cours d'une étude des Gryllidae dans le Plateau Sud Camerounais, deux
nouvelles espéces de la tribu Turanogryllini Otte, 1987 ont été découvertes
et décrites, a savoir Turanogryllus zamakoensis Um Nyobe, Kekeunou & Bilong
Bilong sp. nov. et Neogryllopsis gorochovi Um Nyobe, Kekeunou & Ma sp. nov.
Cette découverte élargie l’aire de répartition connue des genres Turanogryllus
Tarbinsky, 1940 et Neogryllopsis Otte, 1983. De nouveaux environnements
ont été également signalés pour ces grillons et une clé de détermination est
proposée pout les espéces africaines de ces deux genres.

Keywords
bioecology, Central Africa, taxonomy, Turanogryllini

Mots clés

bioecologie, Afrique Centrale, taxonomie, Turanogryllini

Introduction

Despite its central role in ecosystem functioning, biological
diversity remains poorly known in some regions, especially for non-
emblematic species such as orthoptera. In Cameroon, no detailed
taxonomic study of crickets has been performed. Yet, crickets play

several ecosystemic roles and are suitable bioindicators of the
assessment of habitat quality and environmental change (Anso
2016). They form a major component of food webs (Capinera
2011, Wellstein et al. 2011), and some crickets are food for humans
and some pets (Lavalette 2013, Rumpold and Schliiter 2013).
Crickets can also be harmful to the environment (Bellmann and
Luquet 2006). They attack most plants, but they are mostly seen
on young plants that are not resistant to their injuries (Valdeyron
1955, Sikirou et al. 2018).

Crickets from the tribe Turanogryllini Otte, 1987 belong to the
field cricket subfamily Gryllinae Laicharting, 1781 (Chopard 1967,
Tae-Woo 2012). This tribe includes four genera: Podogryllus Karsch,
1893; Turanogryllus Tarbinsky, 1940; Afrogryllopsis Randell, 1964;
and Neogryllopsis Otte, 1983. Its monophyly, however, has not
been confirmed by the recent phylogenetic study of Chintauan-
Marquier et al. (2016). Their taxonomy and distribution have
yet to be clearly established, and several new species remain
undescribed.

The genus Podogryllus is known from Africa (16 spp.) and Saudi
Arabia (3 spp.) (Cigliano et al. 2021). According to Otte (1987),
Afrogryllopsis is a synonym of Podogryllus; a taxonomic revision is
required for these two genera. The genus Turanogryllus is mainly
characterized by the presence of styli on the external apical corners
of the epiphallus (sensu Randell 1964). According to Cigliano
(2021), 36 species have been described from Eurasia (Afghanistan,
Arabia, China, Iran, Israel, and Russia), Indo-Malaysia (India,
Laos, Nepal, and Pakistan), and Africa (Angola, Egypt, Guinea,
Kenya, Sierra Leonne, Zaire, and Zambia). Currently, 10 species
in this genus are known from Africa: T. niloticus (Saussure,
1877); T. scenicus (Gerstacker, 1869); T: machadoi Chopard, 1961;
T. flavolateralis (Chopard, 1934); T: microlyra (Chopard, 1938);
T. vicinus (Chopard, 1967); T. nimba Otte, 1987; T. kitale Otte, 1987;
T: sombo Otte, 1987, and T. mau Otte, 1987 (Cigliano et al. 2021).
The last genus of the tribe, Neogryllopsis, is mainly characterized
by a sharp virga (sensu Randell 1964) without spines along edges

JOURNAL OF ORTHOPTERA RESEARCH 2022, 31(1)

84

(Otte 1983). It is known from southern Malawi, Zimbabwe, and
South Africa. It currently includes 20 species (Otte et al. 1988,
Gorochov 1988), all from Africa. Otte et al. (1988) provided a
key for males and defined five species groups of Southern African
species: Jordani, Pundae, Sabianus, Kuhlgatzi, and Ohopohoi.

In the current study, we update the taxonomic information
on Turanogryllus and Neogryllopsis genera by describing two new
species from Cameroon and providing identification keys to males
of both genera.

Materials and methods

This study was conducted in closed (forests) and open (fields
and/or fallows) environments of three localities in the southern
Cameroonian plateau: Zamakoe, Ongot, and Ngutadjap (Fig. 1).
The characteristics of each study locality can be found in the
publication of Um Nyobe et al. (2021). In these habitats, crickets
were captured from March 2014 to September 2015 using pitfalls
and quadrats, according to the methodology described in Um
Nyobe et al. (2021).

The captured specimens were stored in 70% ethanol and
transported to the zoology laboratory of the University of Yaoundé
I for further studies.

Observations of morphological characters were performed
using a binocular magnifier (Leica) connected to an Amscope
camera (Heerbrugg brand). Pictures of the external morphology
of specimens immersed in 70% ethanol were taken using an
LCD Digital Microscope connected to a computer. Measurements
were taken using a NEIKO electronic caliper. Male genitalia were
dissected and then cleaned with 5% KOH and ethanoic acid for 8
hours and 30 minutes, respectively (Vasanth 1993, Um Nyobe et
al. 2021). Imaging of male genitalia was made using an AmScope
MU1000 digital camera or a Canon EOS 40D Digital SLR camera.
To highlight the structural components of male genitalia, a
water solution containing a drop of JBL Punktol was used. To fix

P. C. A. UM NYOBE, T. ROBILLARD, S. KEKEUNOU, L. MA, M. MBAJOUN NZIKE, C. FE BILONG BILONG

orientations and stabilization of genitalia for photography, a clear
and viscous hand sanitizer was used, following Su (2016).

Abbreviations used in morphological identification.—General
morphology: FI, FII, FIII, fore, mid, hind femora, respectively;
FW, forewing; TI, TIL, TI, fore, mid, hind tibia, respectively.
Terminology of forewing venation follows Desutter-Grandcolas et
al. (2017) and Schubnel et al. (2019): cubital vein, cu.v.; anal vein,
a. v. (= postcubital vein, Pcu); median vein, m.v.; radial vein, r.v,;
subcostal vein and its branches, sc.v.; oblique vein, 0.v.; diagonal
vein, d.v.; anal node, a.n.; mirror, m.; harp, h.; cord, c.; anal field,
a.f.; apical field, ap.f.; lateral field, Lf.

Abbreviations used for the measurements.—Measurements were
recorded in millimeters (mm) following Otte (1985): BL, body
length; FL, hind femora length; TL, hind tibia length; FWL,
forewing length; PL, pronotal length; ML, mirror length; MW,
width of the mirror; OL, ovipositor length; CL, cercal length.

Abbreviations used in genitalia identification.—Desutter (1987),
Randell (1964), and Otte et al. (1988) used different terms
for the same genital structures. Although we realize that there
is a need to have a unified terminology system that does not
currently exist, we chose to use the terminology for male genitalia
adapted from Randell (1964) and Otte et al. (1988) because
they explicitly described the structure of the male genitalia of
the type species of the genera Turanogryllus and Neogryllopsis,
which allows direct comparisons between the new species
and the other species previously described in these genera.
We indicate the terms corresponding to the terminology from
Desutter (1987) in brackets, as presented in the following list of
abbreviations for male genitalia: epiphallus, epi.; ectoparameres,
ect.; endoparameres, end.; ramus, r; virga, v. (ectophallic fold sensu
Desutter); posterior emargination of epiphallus, p.e.e.; stylus, sty.;
lateral lobe of epiphallus, /..e. (median lophi of pseudepiphallus

Fig. 1. Study localities in relation to vegetation types in Cameroon (see Oumarou et al. 2020).

JOURNAL OF ORTHOPTERA RESEARCH 2022, 31(1)

P. C. A. UM NYOBE, T. ROBILLARD, S. KEKEUNOU, L. MA, M. MBAJOUN NZIKE, C. E BILONG BILONG

sensu Desutter); dorsal lobe of ectoparamere, d.l.ect. (lateral lophi
of pseudepiphallus sensu Desutter); ventral lobe of ectoparamere,
v.l.ect. (pseudepiphallic parameres sensu Desutter).

Results
Taxonomy

Order Orthoptera Olivier, 1789
Family Gryllidae Laicharting, 1781
Subfamily Gryllinae Laicharting, 1781
Tribe Turanogryllini Otte, 1987

Diagnosis of tribe Turanogryllini Otte (1987)

Inner tympanum small, present, or absent on TI. Outer
tympanum present, large. THI 0.68-0.86 times as long as FIII.
Male stridulum with small, short setae arranged in ventral view.
Harp with three or more oblique veins connected indirectly
to the stridulatory file through small veins. Mirror with one
dividing vein. Male genitalia large, epiphallus relatively short,
and the entire structure is dominated by huge and sometimes
elaborate ectoparameres that form spikes and may present
prominent serrations. Virga usually stout, narrowing at point;
endoparamers joining posteriorly to form a large muscle
attachment plate.

Genus Turanogryllus Tarbinsky, 1940
Type species. —Gryllus lateralis Fieber, 1853

Diagnosis.—Head globose, body cylindrical. Male tegmina well
developed. Male subgenital plate concave or deeply notched;
dorsal lobes of ectoparameres externally visible; styli present on
the posterolateral corners of epiphallus. Female tegmina reduced
to small pads; ovipositor straight, slender, needle-shaped.

Turanogryllus zamakoensis Um Nyobe, Kekeunou & Bilong
Bilong, sp. nov.
http://zoobank.org/DFD1267F-4E26-47D6-8C38-DADE761156E1

Material examined.—Holotype: CAMEROON e <4; Center
Region, Zamakoe; 3°33'816"N, 11°31'913"E; 14 February 2015;
in crops field, quadrat trap; P. Um Nyobe & team leg.; MNHN-
EO-ENSIF1749. Allotype:—CAMEROON e 9; Center Region,
Zamakoe; 3°33'816"N, 11°31'913"E; 21 March 2015; in crops
field, quadrat trap; P. Um Nyobe & team leg.; MNHN-EO-
ENSIF1713.

Etymology.—The species epithet zamakoensis refers to the type locality.

Diagnosis.—Turanogryllus zamakoensis sp. nov. is distinguished from
congeners by light brown coloration, male genitalia provided with
a large dorsal lobe of ectoparamere, and with microptereous FWs;
the other species are either brachyptereous or macroptereous. In
addition, it has only one outer tympanum while the other species
have tympana on external and internal side.

Description.—(Figs 2, 3) Male. Size average, brown, lighter than
other species. Head dark brown with four pale stripes on occiput,
not extending over vertex (Fig. 2A); cheeks pale (Fig. 2B); ocelli

85

large; face entirely pale below median ocellus and below level of
antennae (Fig. 2C). Pronotum covered with very fine pubescence,
without bristles; dorsum dark brown, muscle attachment plates
pale brown (Fig. 2A); lateral lobes ivory, becoming dark brown
at upper margin (Fig. 2B). TI and TII ivory-colored; TI with a
large outer tympanum. Hindlegs: f FIII pale brown with faintly
darker oblique stripes on outer surface; darker around knees,
especially on inner surface; THI pale brown with 6 inner and 7
outer subapical spurs. FWs with square base, reaching abdomen
mid-length; its length to pronotal length ratio ca. 2.5; dorsum
brown; lateral field pale, dark brown between upper three veins.
Stridulatory file with 156 teeth; harp with 3 oblique veins; mirror
oval, with one dividing vein (Fig. 2E). Hind wings short, hidden
by FWs. Abdomen dorsum dark brown; venter pale; cerci pale.
Male genitalia (Fig. 3): lateral lobes of epiphallus with styli at their
posterior extremities, and these styli are provided with bristles;

Fig. 2. Morphology of Turanogryllus zamakoensis sp. nov. A. Male
head and pronotum; B. Male lateral view of head and pronotum;
C. Male face; D. Female head, pronotum, and FWs; E. Male FW.
Scale bars: 10 mm (A); 8 mm (B, C); 7 mm (D); 5 mm (E). Ab-
breviations: cubital vein, cu.v.; anal vein, a.v. (postcubital vein,
Pcu); median vein, m.v.; radial vein, r.v.; subcostal vein and its
branches, sc.v.; oblique vein, 0.v.; diagonal vein, d.v.; anal node,
a.n.; mirror, m.; harp, h.; cord, c.; anal field, a.f.; apical field, ap.f,;
lateral field, Lf.

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86

P. C. A. UM NYOBE, T. ROBILLARD, S. KEKEUNOU, L. MA, M. MBAJOUN NZIKE, C. FE BILONG BILONG

Fig. 3. Male genitalia of Turanogryllus zamakoensis sp. nov. A. Dorsal view; B. Ventral view; C. Drawing. Scale bar: 500 jam. Abbreviations:
posterior emargination of epiphallus, p.e¢.e.; stylus, sty.; lateral lobe of epiphallus, /./.e.; dorsal lobe of ectoparamere, d.l.ect.; ventral lobe

of ectoparamere, .l.ect.

dorsal lobes of ectoparameres lamelliform, curved dorsally in
its posterior half; ventral lobes of ectoparameres digitiform,
sigmoidally curved; dorsal lobes of ectoparameres enlarged above
ventral lobes of ectoparameres.

Female. Similar to male but occiput with 6 fine, well-
individualized brown stripes; FWs short, overlapping slightly and
with rounded ends (Fig. 2D).

Male measurements (holotype, in mm).—BL, 18.37; PL, 3.83; PW,
4.07; FWL, 9.41; CL, 9.00; FL, 12.18; FW, 4.25; TL, 8.61. Stridulatory
file with 156 teeth.

Key to males of African species of Turanogryllus

1 Pronotum dark-brown OP Dlack® sun. ccnxshostidasarbhosnanseca Gusesehena mass 2
Pron@riialie ht PrOWie. 96S. cin. dsc eateries nds 10
Vertex unbanded.............. Turanogryllus flavolateralis (Chopard, 1934)

- BV ethers DATs. cle u Serene Maa, ceetags haat fa col auanachiay sishananeaauean dae cteMeseweaccess 3

3 Occiput without stripe 0... ee Turanogryllus kitale Otte, 1987

Oecciput with swipe occ dete b ele Teche behes ie tiwie lie beeen: 4
Occiput with one thin medium pale stripe......... cece cece eeseeeeeteeees
re RI Pe PAPAS Rl eS ie! Turanogryllus microlyra (Chopard, 1938)

Occiput with four distinct longitudinal stripes ......... cece 5
5 FWs with a small mirror and long apical field... eects

nape erg eae derudha hited Serpe tearotolas angen dies Turanogryllus nimba Otte, 1987
- FWs with a large mirror and short apical field... ee eeeceeeeeeees 6
6 PE armed wath 5:S:suibapitcal Spurs ce clie. tact ethatectincidrsutbannieetMar hts "
- TIL armed with more than 5:5 subapical Spums............cccceeseeeseees 8
7 FWs covering the abdomen; 4 oblique veins; the first cord sending

one venule to the anterior inner edge of the mirror; dorsal lobes of
ectoparamers located below the ventral OMeS............cccceesseeteeeeteeees
seh sate Mei hd istics MELE: insted Turanogryllus niloticus (Saussure, 1877)
- FWs covering less than half of the abdomen; 3 oblique veins; the
first cord sending two venules to the anterior inner edge of the

mirror; dorsal lobes of ectoparamers located above the ventral
PCS crd sacasanitatine chase sects sagnagiaennes Turanogryllus zamakoensis sp. nov.
8 Dorsal lobe of ectoparameres lamelliform, curved dorsally in its pos-
terior part like claws with more than two fingeTS ............c::csseeseeeees
ase ataaen Tad aba aehatoak ibeatie Turanogryllus scenicus (Gerstacker, 1869)
- Dorsal lobe of ectoparameres lamelliform, curved dorsally in its pos-
terior part like claws with one or two fingePS..........cccccecceseeteeeeeeeees 9
9 Dorsal lobe of ectoparameres with one fingel...........:.cccecceeseseeteetees
Fe sun agenda uchiha Suh at daruo nichts 2 vee eh Turanogryllus mau Otte, 1987
- Dorsal lobe of ectoparameres with two fingeYs ...........::cccceseeseteetees
Sepa Bite tee ait iB Me te ROT MR is Bh Oe atec Turanogryllus sombo Otte, 1987
10 Short diagonal vein and large apical field oo... eee eeecceseeeteeteeeeeeees
0 iets) Weta Ohare aR, Ae eee Turanogryllus vicinus (Chopard, 1967)
- Long diagonal vein and short apical fleld 0... eeecceseeeeteeteeeeees
NORE TY < SR ly Sen eR at ON: Turanogryllus machadoi Chopard, 1961

Genus Neogryllopsis Otte, 1983
Type species.—Neogryllopsis zomba Otte, 1983.

Diagnosis.—Males. Head and pronotum orange-brown on
dorsum, ivory-colored on sides and venter, abdomen banded
with dark brown and ivory on dorsum. Dorsum of head without
longitudinal stripes, sometimes with transverse light and dark
bands. Face and cheeks ivory colored. FWs: Dorsum brown to
gray-brown, lateral field pale; vein 1A strongly raised above level
of stridulum; harp with 5 or 6 veins (rarely 4); harp veins attached
indirectly to the distal half of the stridulum through a series of
small veinlets; stridulum with small short setae arranged along
both sides of the file; diagonal vein bent close to chords. Hind
wings absent in males. Abdomen medium to dark brown, with
pale segmental margins, and tergites becoming pale on sides of
body. Inner tympanum absent on TI; outer tympanum present,
large. FIII with distinct or indistinct oblique rows of medium

JOURNAL OF ORTHOPTERA RESEARCH 2022, 31(1)

P. C. A. UM NYOBE, T. ROBILLARD, S. KEKEUNOU, L. MA, M. MBAJOUN NZIKE, C. E BILONG BILONG

brown spots in middle of inner and outer surfaces. TIII 0.63-0.68
times as long as FIII; with 4 or 5 inner and 4 to 6 outer subapical
spurs. Cerci very pale.

Females. Similar in coloration to males. Apterous. Ovipositor
as long as or longer than FIII.

Neogryllopsis gorochovi Um Nyobe,
Kekeunou & Ma, sp. nov.
http://zoobank.org/50C1C458-BB47-4C8B-A7D6-BA3583D1D599

Material examined.—Holotype: CAMEROON e <; Center Region, On-
got; 3°33'816"N, 11°31'913"E; 23 November 2014; secondary forest,
pitfall trap; P. Um Nyobe & team leg.; MNHN-EO-ENSIF1727. Para-
types: CAMEROON e 19; same information as holotype; MNHN-
EO-ENSIF1751 ¢ 54, 129; Center Region, Zamakoe; 3°33'816"N,
11°31'913"E; 19 October 2014; 16 November 2014; 13 December
2014; crops field and forest, pitfall and quadrat traps; MNHN e 43,
92; Ongot; 3°85'786"N, 11°38'333"E; 27 Sepptember 2014; 26
October 2014; 28 March 2015; 21 April 2015; 23 August 2015; sec-
ondary forest, pitfall traps; P. Um Nyobe & team leg.; MNHN e 26,
72; Ngutadjap; 02°42'N, 011°03'E; 07 December 2014; 14 February
2015, 14 March 2015, 11 June 2015, 09 May 2015, 12 June 2015; sec-
ondary forest, pitfall traps; P. Um Nyobe & team leg.; MNHN.

Etymology.—The species is dedicated to Dr. Andrej V. Gorochov for
his background work on the taxonomy of crickets in general and
of Neogryllopsis species in particular.

Diagnosis.—Characters of the male genitalia of Neogryllopsis
gorochovi Um Nyobe, Kekeunou & Ma sp. nov. grouped it in the
Sabianus group made up of two species, namely Neogryllopsis
sabianus Otte, Toms & Cade, 1988 and Neogryllopsis limpopensis
Otte, Toms & Cade, 1988. Neogryllopsis gorochovi can be
differentiated from these species by its male genitalia with
ectoparamere without setae, short epiphallus, and FW with an
undivided round mirror.

Description.—(Figs 4, 5, Table 1) Male. Medium size, pale orange-
brown. Dorsum of head without a transverse pale band across vertex
(Fig. 4A); top of head without dark markings along inner margins
of eyes; forehead dark brown, without white stripe between lateral
ocelli; cheeks pale brown (Fig. 4B) and face brown before epistomal
suture and pale after this suture (Fig. 4C). Pronotum red-brown
without ivory-colored band along margins (Fig. 4A). TI and TII
pale, somewhat orange. Hindlegs: FIII with distinct oblique brown
stripes on outer surface; THI pale brown with 5 inner and 5 outer
subapical spurs. FWs: dorsum grayish brown, lighter on lateral
field; FW length to pronotal length ratio c. 2.3 mm; stridulatory
file with 86 teeth; harp with 4 oblique veins; mirror round without
a dividing vein; apical field very small (Fig. 4E). Hind wings absent.
Abdomen: Tergites dark brown, with pale posterior margins; venter
light brown; cerci dark brown. Male genitalia (Fig. 5): Epiphallus
well developed but short; lobes of epiphallus in posterior view
long, tapering, two points closely apposed, separated by a deep
cleft; lateral lobe of epiphallus with long setae near base and
without spines; ectoparamere without setae.

Female. Similar to male in color. Size range extends
considerably above that of male (Table 1). FWs very short,
sometimes just visible under edge of pronotum (Fig. 4D).

87

Fig. 4. Morphology of Neogryllopsis gorochovi sp. nov. A. Male head
and pronotum; B. Male lateral view of head and pronotum; C.
Male face; D. Female head, pronotum, and FWs; E. Male FW. Scale
bars: 7 mm (A); 6 mm (B, E); 5 mm (C); 8 mm (D).

Male measurements (holotype, in mm).—BL, 15.03; PL, 2.60;
PW 2421255 FW, 6202; CL, 10332 TE,. 1182; EW, 32835, TL 9:49:
Stridulatory file with 86 teeth.

Key to males of African Neogryllopsis species of
Sabianus group

1 FWs without a dividing vein in mirror; harp with 4 oblique veins;
less than 200 stridulatory file teeth; ectoparamere without setae ......
Pca deanna tiga vam ekg Stengel kinked. Neogryllopsis gorochovi sp. nov.
- FWs with a dividing vein in mirror; harp with 5 oblique veins; more
than 200 stridulatory file teeth; ectoparamere with setae................. 2
2 Stridulatory file with 200 to less than 270 teeth; presence of white
stripe between lateral ocelli and pale band across vertex; pronotum
reddisinbrowinjanbamdeds xt}. isi). 2 bate ates eh ben oir eed lh ieee
i toMe tinged laud cde Neogryllopsis sabianus Otte, Toms & Cade, 1988
- Stridulatory file with more than 270 teeth; absence of white stripe
between lateral ocelli and pale band across vertex; pronotum
reddish brown but with a distinct ivory-colored band along all
IMATPINIS 7, oF naz. Neogryllopsis limpopensis Otte, Toms & Cade, 1988

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88 P. C. A. UM NYOBE, T. ROBILLARD, S. KEKEUNOU, L. MA, M. MBAJOUN NZIKE, C. FE BILONG BILONG

Fig. 5. Male genitalia of Neogryllopsis gorochovi sp. nov.; A. Dorsal view; B. Ventral view; C. Drawing. Scale bar: 500 pm. Abbreviations:
epiphallus, epi.; ectoparameres, ect.; endoparameres, end.; ramus, 1; virga, v.; posterior emargination of epiphallus, p.e.e.

Table 1. Measurements in mm: average + standard error (mini-

mum-maximum) total abundance.

Feature Male Female
BL 15.77 + 0.48 17.43+40.34
(14.10-19.84) 12 (14.64-21.10) 29
PL 2.93 + 0.08 3.2640.06
(2.40-3.23)12 (2.62-4.45)29
PW 3.95 + 0.03 4.23+0.06
(3.77-4.12)12 — (3.16-4.68)29
FWL 5.174 0.22 -
(3.99-6.10) 12
CL 9.15 + 0.87 11.00+40.32
(8.27-11.58) 11 (6.83-14.24)29
FL 12.32 + 0.11 12.73+40.13
(11.60-12.92)12 (10.43-13.8)29
FW 3.92 + 0.10 4.19+0.06
(3.43-4.61)12 (3.33-4.67)29
TL 9.88 + 0.23 10.34+40.16
(7.88-10.62)12 (8.45-11.48)29
OL - 9.304+0.28
(7.52-13.89)29
FWL/PL 1.78 + 0.09 -
(1531 -2°39),49
CL/FL 0.744 0.07 0.8640.02
(0.67-0.93) 11 (0.65-1.24)29
OL - 0.7440.03
FL (0.59 -1.15)29
Discussion

We described two new species belonging to the genera

t Value

2e70)

3129

2.14

P Value

0.01

0.002

0.01

0.039

These species, namely Turanogryllus zamakoensis Um Nyobe,
Kekeunou & Bilong Bilong sp. nov. and Neogryllopsis gorochovi Um
Nyobe, Kekeunou & Masp. nov., are characterized by comparatively
low numbers of teeth on the stridulatory file, i.e, 156 and 86
teeth, respectively, while the other known species belonging to the
genera Turanogryllus and Neogryllopsis have stridulatory files with
more than 200 teeth (Otte 1994, Otte et al. 1988).

It is worth noting that all species of the genus Turanogryllus
have TI with small inner and large outer tympanum (Tarbinsky
1940), while those of the genus Neogryllopsis have divided mirrors
(Otte 1987). Nevertheless, T. zamakoensis sp. nov. has only one
outer tympanum, and N. gorochovi sp. nov. has an undivided
mirror as found in Neogryllopsis storozhenkoi Gorochov, 1988
(Otte et al. 1988).

The description of these two new species of Turanogryllini
from Central Africa (more precisely, from Cameroon), extends the
known range for both genera. In addition, they were previously
known as field crickets (Randell 1964, Otte 1983, Otte 1987, Otte
et al. 1988) but in the current work, T. zamakoensis sp. nov. was
captured in a forested area,while N. gorochovi sp. nov. was found
in both open and closed environments. It is possible that T.
zamakoensis and N. gorochovi also occur in open areas near forests.
To better characterize the species’ living environments, additional
studies are needed.

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