The first phylogenetic study of sword-tail crickets from China inferred from COI, 18 S and 28 S genes, with the establishment of two new genera and description of one new species (Orthoptera: Grylloidea: Trigonidiidae)
Author
He, Zhu-Qing
Museum of Biology, School of Life Sciences, East China Normal University, Shanghai 200241, China.
Author
Shen, Chu-Ze
Co-first author, MOE Key Laboratory for Biodiversity Science and Ecological Engineering, and College of Life Sciences, Beijing Normal University, Beijing 100875, China. shencz. pkubio @ gmail. com; https: // orcid. org / 0000 - 0002 - 9026 - 3036
Author
Wu, Xue
Museum of Biology, School of Life Sciences, East China Normal University, Shanghai 200241, China. & 13037927985 @ 163. com; https: // orcid. org / 0000 - 0002 - 5758 - 5340
text
Zootaxa
2020
2020-12-01
4890
1
119
128
journal article
9391
10.11646/zootaxa.4890.1.7
1b212615-715f-4bad-9944-a99f8236968a
1175-5326
4301660
84853678-392C-46CD-8807-56860EFF3AAB
Emerasoma curvicerca
He
sp. nov.
Figs. 2–3
Holotype
: male,
China
,
Zhejiang
,
Lin’an
, Tianmushan.
N 30°18'53"
,
E 119°27'23"
, Alt.
300 m
,
17-viii-2018
, coll.
He Zhu-Qing
. (depository: East
China
Normal University,
China
)
Paratype
:
1 male
&
1 female
, same data as holotype
;
2 males
,
China
,
Zhejiang
,
Lin’an
, Tianmushan.
N 30°18'53"
,
E 119°27'23"
, Alt.
300 m
,
6-ix-2019
, coll.
He Zhu-Qing
;
1 male
,
China
,
Zhejiang
,
Ningbo
, Tiantongshan.
N 29°48'30"
,
E 121°47'56"
, Alt.
350 m
,
22-ix-2018
, coll.
He Zhu-Qing.
Description.
Male. Body slender and pubescent (
Fig. 2A
,
Fig. 3A
). Head wider than anterior margin of pronotum, eyes large, frontal rostrum as wide as 1st antennal joint, vertex very flattened (
Fig. 2C
), 5th joint of maxillary palpi triangular (
Fig. 2E
). Pronotum transverse with posterior margin as wide as head, no obvious lateral carina between disk and lateral lobes, large oval tympanum on inner side of fore tibiae, and a small tympanum on outside (
Fig. 2F
), forewings pubescent and long, exceeding to apex of abdomen, vein parallel without false vein, cross vein existed but not obvious, inner half of dorsal field of left forewing membranaceous, covered by right forewing (
Fig. 2A
), hindwings longer than forewings, hind tibia with three external dorsal spurs and three internal dorsal spurs; apex with six apical spurs with superior apical spur longest in inner side longest, claw with two teeth on each side. Cercus curved inwards, and then outwards (
Fig. 2G
,
Fig. 3A
). Genitalia: pseudepiphallus with two lateral lobes with left one larger, right lobes sclerotized with sharp apical parts upwards, and left lobe with plier-shape lophus at the posterior apex, pseudepiphallic parameres shorter than sclerotized lophus but expanded, with a tooth at middle on each inner side from dorsal view, ectophallic fold strangle sclerotized, endophallic sclerite as the shape of triangular scale, ramus sclerotized and robust, trapezoid shape (
Fig. 2
I–J).
Female. Similar to male. Cercus not curved (
Fig. 3B
). Ovipositor upward curved, denticulate on the apical valves on both dorsal and ventral margin (
Fig. 2H
).
Coloration. Totally yellow, but green when living. Hindwing brown, but yellow in base half (
Fig. 3
A–B).
Etymology.
Species name
curvicerca
means its curved cercus.
Measurements (in mm).
Male: body length 5.95–6.26, pronotum length 1.18–1.20, hind femur length 3.93–4.24, forewing length 5.16– 5.43, hindwing length 7.74–8.12;
FIGURE 2.
Emerasoma curvicerca
sp. nov.
A. male in dorsal view, B. female in dorsal view, C. male head in dorsal view, D. female head in dorsal view, E. palpus, F. tympana (1. outside, 2. inner side), G. cercus, H. ovipositor, I. male genitalia in dorsal view, J. male genitalia in ventral view.
FIGURE 3.
Emerasoma curvicerca
sp. n.
(A. male, B. female). (photos by He Zhu-Qing)
Female: body length 6.19, pronotum length 1.25, hind femur length 3.95, forewing length 5.37, hindwing length 8.85, ovipositor length 2.49.
Distribution.
China
(
Zhejiang
), Borneo?
Note.
Male genitalia of one specimen from Borneo (identified by Chopard as
M
.
flavescens
) was illustrated in
Otte & Alexander 1983
, Fig. 157D. However, this specimen has very different genitalia character compared with
M
.
flavescens
illustrated by Chopard in 1936, but nearly same to the new species
E
.
curvicerca
He
sp. nov.
Thus, we here consider potential distribution of the new species in Borneo.