Changminia gen. nov., a new genus of daddy-long-leg spiders (Araneae: Pholcidae) from karst caves in Southeast Asia
Author
Chu, Chang
0000-0003-3520-5463
College of Life Science, Shenyang Normal University, Shenyang 110034, Liaoning, China & changchu 1998 @ outlook. com; https: // orcid. org / 0000 - 0003 - 3520 - 5463
changchu1998@outlook.com
Author
Yao, Zhiyuan
0000-0002-1631-0949
College of Life Science, Shenyang Normal University, Shenyang 110034, Liaoning, China & yaozy @ synu. edu. cn; https: // orcid. org / 0000 - 0002 - 1631 - 0949
yaozy@synu.edu.cn
Author
Wongprom, Prasit
0000-0002-2749-0869
Faculty of Forestry, Kasetsart University, Ladyao, Jatujak, Bangkok 10903, Thailand & p _ wongprom @ hotmail. com; https: // orcid. org / 0000 - 0002 - 2749 - 0869
p_wongprom@hotmail.com
Author
Li, Shuqiang
0000-0002-3290-5416
Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China & lisq @ ioz. ac. cn; https: // orcid. org / 0000 - 0002 - 3290 - 5416
lisq@ioz.ac.cn
text
Zootaxa
2022
2022-01-19
5092
2
238
246
journal article
2492
10.11646/zootaxa.5092.2.6
19fa0719-23b7-4d3a-9caf-9e59c1c4262d
1175-5326
5876688
7FC04364-0793-4F24-A021-D170675E18C4
Genus
Changminia
Yao & Li
gen. nov.
Type
species:
Holocneminus huangdi
Tong & Li, 2009
.
Etymology.
The generic name is dedicated to the late Chinese arachnologist Changmin Yin. Gender is feminine.
Diagnosis.
This genus can be easily distinguished from
Holocneminus
Berland, 1942
and
Physocyclus
Simon, 1893
by the wide procursus in dorsal view (wider than
Holocneminus
and
Physocyclus
;
Figs 2D
,
4D
), procursus with sclerotized prolatero-subdistal apophysis (arrow in
Fig. 2C
, arrow
1 in
Fig. 4C
; absent in
Holocneminus
and
Physocyclus
), by embolus semi-transparent (
Figs 2A
,
5D
; sclerotized in
Holocneminus
and
Physocyclus
), and by vulval pore plates not seen (
Figs 3B
,
5C
; with pair of distinct vulval pore plates in
Holocneminus
and
Physocyclus
); also distinguished from
Physocyclus
by external female genitalia without ventral apophyses on anterior part or lateral constraints in middle part (present in
Physocyclus
) and by vulval anterior arch without sclerotized projections on anterior part (present in
Physocyclus
).
Description. Male:
Total length 1.92–1.96 (2.04–2.20 with clypeus). Ocular triads relatively close together, distance PME-PME 0.10, diameter PME 0.09–0.10, distance PME-ALE 0.03, distance AME-AME 0.02, diameter AME 0.03–0.04. Sternum wider than long. Carapace with brownish radiating/Y-shaped marks; clypeus with brownish marks; sternum brownish/yellowish (
Figs 3E–F
,
5G–H
). Legs with slightly darker rings on distal parts of femora and tibiae. Opisthosoma globose, with brown dorsal and lateral spots (
Figs 3E–F
,
5G–H
). Ocular area elevated and separated from rest of carapace. Thoracic furrow shallow but distinct (
Figs 3E–F
,
5G–H
). Chelicerae (
Figs 3C–D
,
5E–F
) with pair of proximo-lateral apophyses (pa in
Figs 3C–D
,
5E–F
) with stridulatory ridges, pair of distal apophyses with several sclerotized cones each (da in
Fig. 5E
)/cone-shaped distal apophyses (da in
Fig. 3C
), and pair of frontal apophyses with sclerotized cones each (fa in
Figs 5E–F
; absent in
C. huangdi
). Pedipalpal coxa unmodified; trochanter with retrolateral apophysis; femur conspicuously enlarged and dorsally strongly curved, with proximo-retrolateral protrusion (
Figs 2A–B
,
4A–B
); procursus curved, with prolatero-subdistal apophysis (arrow in
Fig. 2C
, arrow
1 in
Fig. 4C
); bulb simple, no other projections except for semi-transparent embolus (
Figs 2A
,
5D
). Leg formula 1>4>2>3; legs with short vertical setae on tibiae, metatarsi and tarsi, without spines or curved setae; tarsus I with>6 distinct pseudosegments.
Female:
Similar to male, sexual dimorphism very slight. Chelicerae unmodified. External female genitalia brown, with median apophysis (ma in
Figs 3A
,
5A–C
). Vulva with membranous anterior arch and nearly n-shaped sclerite (arrow in
Figs 3B
,
5C
), pore plates not seen.
Natural history.
Unknown, except the species were collected in the aphotic zone inside the cave.
Distribution.
China
(
Hainan
,
Fig. 1
),
Thailand
(Prachuap Kiri Khan,
Fig. 1
).
Composition.
C. huangdi
(
Tong & Li, 2009
)
comb. nov.
and
C. dao
Yao & Li
sp. nov.