Thyropygus forceps sp. nov.

urn:lsid:zoobank.org:act: 11BAAEC5-404D-4E15-982C-2F3E51DEA56B

Figs 4 A–E, 11B

Diagnosis

A species of the opinatus subgroup. Lateral process of anterior coxal fold ( alp) long, slender, regularly curved, tip close to tip of opposite alp, the two together forming a circle. Similar in this respect to T. erectus and T. floweri. Differs from the former by having a telopodite lobe ( lo). Particularly similar to T. floweri, differing from it by having the mesal process of posterior coxal fold ( pmp) slender, directed distolaterad, laterally with a digitiform process ( plp), and by not having pmp strongly developed along the anterior-posterior axis.

Etymology

The name is a Latin noun in apposition, referring to the forceps-like gonopod coxae.

Material examined

Holotype

THAILAND: ³, Nakhonsrithammarat Province, Lanska District, Namwang Srithammasokrach, 8°20'25" N, 99°49'42" E, 16 May 2010, leg. S. Panha, P. Pimvichai and members of the Animal Systematics Research Unit ( CUMZ-D00092).

Paratypes

THAILAND: 2³³, 2subadult ³³, same data as holotype ( CUMZ-D 00073); 5³³, Nakhonsrithammarat Province, Ronpiboon District, Tham Pha Deang temple, 8°14'42" N, 99°52'03" E, 14 May 2012, leg. C. Sutcharit and members of the Animal Systematics Research Unit ( CUMZ-D 00093); 2 ³³, same data as preceding ( ZMUC).

Description

Adult males with 54–62 podous rings, no apodous rings. Length 9–12 cm, width 4.6–5.8 mm. Overall colour of living animal ( Fig. 11B) brown. Legs, antennae, middorsal metazona, epiproct, paraprocts and hypoproct brownish orange; preserved specimens with head, antennae, prozona, legs, middorsal metazona, epiproct, paraprocts and hypoproct brown; metazona dark brown.

GONOPODS ( Fig. 4 A–E). Anterior coxal fold ( ac; Fig. 4A): distinctly crenulated along convex part of lateral margin (smooth in specimens from Tham Pha Deang temple), lateral process ( alp) long, slender, regularly curved, tip close to tip of opposite alp, the two together forming a circle; mesal process ( amp) slightly shorter than alp, directed obliquely disto-mesad (in specimens from Tham Pha Deang temple lateral process ( alp) long, slender, crossing over with opposite tip, the two together forming a circle; Fig. 4B); mesal process ( amp) slightly shorter than alp, directed distad, slightly sigmoid. Posterior coxal fold ( pc; Fig. 4C) basally with moderately high lateral paracoxites ( px), distally with two processes: mesal process ( pmp) slender, directed distolaterad; lateral process ( plp) digitiform. Telopodite ( Fig. 4 D–E) leaving coxite over shelf of posterior coxal fold; femoral spine ( fe) massive, curving in horizontal plane and curving against ti; telopodite distally to fe with large, round lobe ( lo) projecting distolaterally; tibial spine ( ti) very long, slender, curving in horizontal plane, its tip resting against base of fe; apical part: spatulate lobe ( sl) with sharp dark brown spine at tip; palette ( pa) simple, distally with about nine brownish blepharochaetae ( bp).

DNA barcode

The GenBank accession number of the barcode of one of the paratypes is KC519531 (voucher code CUMZ-D00073).

Distribution ( Fig. 12)

Known only from Namwang Srithammasokrach and Tham Pha Deang temple in Nakhonsrithammarat Province.

Remarks

Coexisting with the larger T. cimi sp. nov. at Namwang Srithammasokrach.