Trilacuna sinuosa, Tong, Yanfeng & Li, Shuqiang, 2013

Tong, Yanfeng & Li, Shuqiang, 2013, The first goblin spiders of the genus Trilacuna from Vietnam (Araneae, Oonopidae), Zootaxa 3709 (3), pp. 277-284 : 278-284

publication ID

https://doi.org/ 10.11646/zootaxa.3709.3.6

publication LSID

lsid:zoobank.org:pub:0E6D2049-59E5-4134-B393-233897D3EA4B

DOI

https://doi.org/10.5281/zenodo.6145092

persistent identifier

https://treatment.plazi.org/id/8F1B87C5-D957-FFFF-29D5-2603FE675DCE

treatment provided by

Plazi

scientific name

Trilacuna sinuosa
status

sp. nov.

Trilacuna sinuosa View in CoL sp. nov.

( Figs 4 View FIGURE 4. A – D E–H, 5)

Type material. 1 female holotype ( IZCAS Ar 19421), Tam Dao National Park, Vinh Phuc, Vietnam, leaf litter sieving in disturbed forest (21˚30.516′N, 105˚34.263′E, altitude ca. 509 meters), Pham Dinh-Sac, 17. V. 2007.

Etymology. The specific name is Latin, meaning “curving”, and refers to the strongly winding tube in the female epigastric region ( Fig. 4 View FIGURE 4. A – D F); adjective.

Diagnosis. The new species is similar to T. mahanadi Grismado & Piacentini , but can be distinguished by the numerous granulates on the sides of the carapace ( Figs 5 View FIGURE 5 A–E), the longer postepigastric scutum ( Fig. 5 View FIGURE 5 J), the strongly winding tube (swt) and straight, narrow sclerite (sns) in the female genital area ( Figs 4 View FIGURE 4. A – D E–H).

Description. Female. Completely chitinized. Body yellow-brown,chelicerae and sternum lighter, legs yellow. Habitus as in Figs 5 View FIGURE 5 A, B. Body length 2.07; carapace 0.96 length, 0.75 width; abdomen 1.19 length, 0.71 width. Carapace broadly oval, slightly elevated, dorsal surface smooth, with three rows of short hairs between eyes and posterior border of elevation of carapace; sides with numerous granulates; lateral margin rebordered, with a row of short, finely hairs and small blunt denticles. Eyes six ( Figs 5 View FIGURE 5 C–E), well developed, arranged in a compact group, about subequal, roundish; posterior row recurved from above, straight from front. Clypeus sinuous in frontal view, anterior lateral eyes separated from edge of carapace by about twice their diameter, with needle-like setae ( Fig. 5 View FIGURE 5 E). Mouthparts: Chelicerae straight, proximal region with one hair with elevated hair base; labium rectangular, not fused to sternum, anterior margin deeply incised (ldi) ( Fig. 5 View FIGURE 5 F); endites slender, distally not branched. Sternum ( Fig. 5 View FIGURE 5 F) without radial furrows between coxae, surface finely reticulate; setae sparse, light, needle-like, evenly scattered. Abdomen: Ovoid, dorsal scutum not fused to epigastric scutum, postepigastric and epigastric scutum not fused, apodemes present, posterior spiracles connected by groove ( Figs 4 View FIGURE 4. A – D E, 5I); with two strongly sclerotized, recurved arches (sar) anterior to the posterior spiracles ( Fig. 4 View FIGURE 4. A – D E); booklung covers (boc) large, ovoid, surface smooth ( Figs 5 View FIGURE 5 H, J). Leg spines: metatarsi I, II with 4 pairs of ventral spines each, tarsi I, II with 2 pairs of ventral spines each; legs III and IV without spines.

Female genitalia: Ventral view ( Figs 4 View FIGURE 4. A – D E, G): Uterus externus appearing as a procurved fold (pfo), ending in two dark brown knobs (dkn); anterior margin of postepigastic scutum (amp) recurved at middle; surface without external features except for a rugose surface around the epigastric furrow. Dorsal view ( Figs 4 View FIGURE 4. A – D F, H): with a strongly winding tube (swt) running posteriorly, then turning backwards, ending in a straight, narrow sclerite (sns); apodemes present (apo).

Male: Unknown.

IZCAS

Institute of Zoology, Chinese Academy of Sciences

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Oonopidae

Genus

Trilacuna

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