Thyropygus bifurcus ( Demange, 1986 )

Thyropygus bifurcus ( Demange, 1986) View in CoL

( Figs. 1 View FIGURE 1 A–E)

Thyropisthus bifurcus Demange, 1986: 852 View in CoL

[ Thyropisthus bifurcatus Demange, 1986: 853 View in CoL , lapsus calami] Thyropygus bifurcus: Enghoff 2005: 93 View in CoL

Cornugonus bifurcus: Jeekel 2006: 19 View in CoL

Material: HOLOTYPE male THAILAND, Nakhonsrithammarat Province, Khao Luang, 8° 34ˏ 39˝ N, 99° 42ˏ 55˝ E, B. Degerbøl leg., ( ZMUC). – 1 male paratype, same data as holotype ( ZMUC).

Diagnosis: A species of the bifurcus subgroup. Lateral margin of lateral process of anterior coxal fold ( alp) with a small crest. Similar in this respect to T. demangei and T. quadricuspis . Differs from T. demangei by having the first femoral spine ( fe 1) almost as long as the second femoral spine ( fe 2). Differs from T. quadricuspis by having a double femoral spine ( fe). Differs from all other species of the T. bifurcus subgroup by having the lateral margin of alp folded caudad along the whole length.

Description: Adult males with 61–63 podous rings, no apodous rings. Length ca. 10 cm (broken), width ca. 8.0 mm. Color in life unknown; preserved holotype with head, antennae, legs, prozona, epiproct, paraprocts, and hypoproct brown; metazona and margins of paraprocts dark brown.

Gonopods ( Figs. 1 View FIGURE 1 A–E): Anterior coxal fold ( ac) ( Fig. 1 View FIGURE 1 A): lateral process ( alp) regularly curved, in anterior view sickle-shaped, lateral margins folded caudad along entire length, with a small crest ( Fig. 1 View FIGURE 1 C, arrow), ca. 1/3 from tip; mesal process ( amp) slightly shorter than lateral process, directed distad, slightly sigmoid, pointed. Posterior coxal fold ( pc) ( Fig. 1 View FIGURE 1 B) basally with moderately high lateral paracoxites ( px), distally truncate, forming shelf ( sh) for accommodation of telopodite; mesal process ( pmp) slender, directed distolaterad. Telopodite ( Figs. 1 View FIGURE 1 D–E) leaving coxite over shelf of posterior coxal fold; double femoral spine ( fe), the first fe ( fe 1) slender, inflexed, in situ resting against posterior surface of alp, the second fe ( fe 2) situated under fe 1, slender, curved rearwards; tibial spine ( ti) long, slender, curving in horizontal plane; apical part: lamellar lobe ( ll) small, slightly twisted; palette ( pa) simple, with a longitudinal rounded crest ( cr) near tip, distally with about eight brownish blepharochaetae ( bp).

Distribution ( Fig. 8 View FIGURE 8 ): Known only from the type locality.