Tangguoa Yao & Li, 2021

Yao, Zhiyuan, Luo, Yiping & Li, Shuqiang, 2021, Tangguoa gen. nov., one new genus of daddy-long-leg spiders (Araneae: Pholcidae) from southern China, Zootaxa 4938 (1), pp. 131-140 : 132

Genus Tangguoa Yao & Li gen. nov.

Type species: Tangguoa laibin Yao & Li sp. nov.

Etymology. The generic name is dedicated to the late Chinese arachnologist Guo Tang. Gender is feminine.

Diagnosis. This genus can be easily distinguished from Khorata Huber, 2005 and Savarna Huber, 2005 by male pedipalpal femur strongly curved dorsally ( Figs 2 A–B, 4A–B; straight/slightly curved in Khorata and Savarna ), by male chelicerae with distal apophyses medially (arrow da in Figs 3 C–D, 5C–D; with distal apophyses laterally in Khorata , without distal apophyses in Savarna ) provided with row of teeth (without teeth in Khorata ), and by external female genitalia with postero-median apophysis provided with pointed tip (arrow ma in Figs 3A , 5A ; some species with postero-median lip in Khorata , without postero-median apophysis in Savarna ); also distinguished from Khorata by male chelicerae without hooked frontal apophyses ( Figs 3 C–D, 5C–D; with hooked frontal apophyses medially in Khorata ).

Description. Male: Total length 2.03–2.84 (2.23–3.03 with clypeus). Ocular triads relatively close together, distance PME-PME 0.16, diameter PME 0.10–0.11, distance PME-ALE 0.03, AME absent. Sternum wider than long. Carapace with brownish radiating marks and narrow, dark median line/brown margins and wide, brown median stripe; clypeus with brownish lateral marks; sternum brown ( Figs 3 E–F, 5E–F). Legs with distinct darker rings on subdistal parts of femora and proximal/subdistal parts of tibiae. Opisthosoma with large, brown posterior marks/ large, brown, dorsal and lateral spots ( Figs 3 E–F, 5E–F). Ocular area slightly elevated and separated from rest of carapace. Thoracic furrow shallow, but distinct ( Figs 3E , 5E ). Clypeus unmodified. Opisthosoma oval. Chelicerae with pair of proximo-lateral apophyses (arrow pa in Figs 3 C–D, 5C–D) with lateral apophyses and scales (arrow in Figs 3 C–D, 5D) and pair of distal apophyses with row of teeth (arrow da in Figs 3 C–D, 5C–D). Pedipalpal coxa unmodified; trochanter with retrolateral apophysis and ventral apophysis (both as wide as long; Figs 2 A–B, 4A–B); femur strongly curved dorsally, with retrolateral apophysis ( Figs 2B , 4B ); patella large; procursus complex distally, without hinged process (hinged process defined as figs 421, 432 in Huber 2011a); bulb simple, without other projections except for embolus ( Figs 2 A–B, 4A–B). Leg formula 1>2>4>3 or 1>4>2>3; retrolateral trichobothrium of tibia I at 10–11% proximally; legs with vertical setae on tibiae, metatarsi and tarsi, without spines or curved setae; tarsus I with>15 distinct pseudosegments.

Female: Similar to male, sexual dimorphism very slight. Legs slightly shorter. Chelicerae unmodified. External female genitalia brown, simple, with postero-median apophysis (arrow ma in Figs 3A , 5A ) provided with pointed tip, without knob or pockets. Vulva ( Figs 3B , 5B ) with anterior arch and pair of pore plates.

Natural history. Unknown, excepting the specific data of collection from specimens presented here.

Distribution. China (Guangxi, Hainan; Fig. 1 ).

Composition. T. laibin Yao & Li sp. nov. and T. tongguling Yao & Li sp. nov.

Figures

FIGURE 1. Distribution records of the genus Tangguoa gen. nov. from southern China. 1 Tangguoa laibin sp. nov., 2 Tangguoa tongguling sp. nov.

FIGURE 2. Tangguoa laibin sp. nov., holotype male.A–B. Pedipalp (A. Prolateral view; B. Retrolateral view); C–D. Distal part of procursus (C. Prolateral view, arrows 1–3 indicate prolatero-ventral, distal, and dorsal apophysis, respectively; D. Retrolateral view, arrows indicate retrolateral processes). b = bulb, e = embolus, pr = procursus. Scale bars: 0.10 (A–B), 0.05 (C–D).

FIGURE 3. Tangguoa laibin sp. nov., holotype male (C–F) and paratype female (A–B, G–H). A. External female genitalia, ventral view; B. Vulva, dorsal view; C–D. Chelicerae (C. Frontal view; D. Lateral view; arrow indicates lateral apophysis); E–H. Habitus (E, G. Dorsal view; F. Lateral view; H. Ventral view). da = distal apophysis, ma = postero-median apophysis, pa = proximo-lateral apophysis, pp = pore plate. Scale bars: 0.10 (A–D), 0.50 (E–H).

FIGURE 4. Tangguoa tongguling sp. nov., holotype male. A–B. Pedipalp (A. Prolateral view; B. Retrolateral view); C–D. Distal part of procursus (C. Prolateral view, arrows 1–5 indicate prolatero-ventral, ventral, distal, dorsal, and retrolateral apophysis, respectively; D. Retrolateral view). b = bulb, e = embolus, pr = procursus. Scale bars: 0.10 (A–B), 0.05 (C–D).

FIGURE 5. Tangguoa tongguling sp. nov., holotype male (C–F) and paratype female (A–B, G–H).A. External female genitalia, ventral view, arrows 1–2 indicate postero-lateral apophyses; B. Vulva, dorsal view; C–D. Chelicerae (C. Frontal view, arrow indicates frontal apophysis; D. Lateral view, arrow indicates lateral apophysis); E–H. Habitus (E, G. Dorsal view; F. Lateral view; H. Ventral view). da = distal apophysis, ma = postero-median apophysis, pa = proximo-lateral apophysis, pp = pore plate. Scale bars: 0.10 (A–D), 0.50 (E–H).