Thyropygus mesocristatus, Pimvichai & Enghoff & Panha & Backeljau, 2016

Thyropygus mesocristatus View in CoL sp. nov.

urn:lsid:zoobank.org:act:

Fig. 5 View Fig A–E

Diagnosis

A species of the opinatus subgroup. Lateral process of anterior coxal fold ( alp) slender, curving mesad; mesal process of anterior coxal fold ( amp) as long as alp, slender, straight, directed distad. Similar in these respects to T. demangei . Differs from this species by having mesal margin of amp forming a strong longitudinal crest ( lc) in posterior view, by having only one femoral spine ( fe) and by having the spatulate lobe ( sl) broad and rounded.

Etymology

The name is a Latin adjective, referring to the longitudinal crest on the mesal process of the anterior coxal fold.

Material examined

Holotype THAILAND: ♂, Songkhla Province, Rattaphum District, Srikasorn , 7°00'18" N, 100°08'24" E, 12 Jan. 2009, leg. P. Pimvichai, C. Sutcharit and members of the Animal Systematics Research Unit ( CUMZ-D00094 ). GoogleMaps

Paratype THAILAND: ♂, same data as holotype ( CUMZ-D00077 ). GoogleMaps

Description

Adult males with 61–66 podous rings, no apodous rings. Length 16–17 cm, width 9.2–9.5 mm. Colour in life unknown; preserved specimens with head, antennae, prozona and legs brown; metazona, epiproct, paraprocts and hypoproct reddish brown.

GONOPODS ( Fig. 5 View Fig A–E). Anterior coxal fold ( ac; Fig. 5A View Fig ): lateral process ( alp) slender, curving mesad, with lateral serrate crest near tip ( Fig. 5C View Fig , arrow); mesal process ( amp) as long as alp, slender, straight, directed distad, tip sharp, pointed, in posterior view mesal margin of amp forming strong longitudinal crest ( lc). Posterior coxal fold ( pc; Fig. 5B View Fig ) basally with moderately high lateral paracoxites ( px), distally with two processes: mesal process ( pmp) slender, directed anteriad; lateral process ( plp) short, erect, digitiform; forming shelf for accommodation of telopodite. Telopodite ( Fig. 5 View Fig D–E) leaving coxite between pmp and plp; femoral spine ( fe) long, curved downward, with expanded lamella at base; tibial spine ( ti) very long, curving in horizontal plane, tip close to basal part of fe; small spine ( ss) at base of apical part, opposite origin of tibial spine; spatulate lobe ( sl) broad, rounded; a small accessory lobe ( al) at base of sl; palette ( pa) simple, gutter-like, with longitudinal crest ( cr) at middle, distally with about twelve brownish blepharochaetae ( bp).

DNA barcode

The GenBank accession number of the barcode of the paratype is KC519534 View Materials (voucher code CUMZ-D00077).

Distribution ( Fig. 12 View Fig )

Known only from the type locality.