Antichiropus filiolus Car, n. sp. (Figs 14 A–E, 16) ZooBank: urn:lsid:zoobank.org:act: 49F0DA5A-29E4-4E3D-848A-481DFA0A3653

Type material examined. Australia: Western Australia: holotype male (badly damaged), Flinders, ca. 100 km NW. of Tom Price, 22°10’34.2”S, 117°28’09.9”E, 4 April 2011, stygofauna net, J.S. Cocking and M.K. Curran (WAM T116433)

Diagnosis. This species is minute compared with all other species with a short, simple gonopod.

Description. Male holotype: Body ca. 10 mm long; midbody ring ca. <1 mm wide, with lightly beaded waist, metazonite and prozonite of similar width. The only specimen pale and translucent,

Colour true colour unknown (Fig 14A): leg colour slightly darker. No paranota (Fig 14B). Sternites without obvious processes/tubercles, sternal lamella narrow, rounded. Leg coxal processes absent. Anterior spiracles at midbody tiny, indistinct.

Head smooth without noticeable sculpturing; frons with few setae; face narrow, maximum width ca. 3x the distance between antennal sockets; sockets separated by ca. 2x width of socket.

Antennae of moderate length, reaching to ring 2, clavate.

Collum (badly damaged) much shorter than head (in lateral view) (Fig 14A).

Gonopod short, reaching ring 6; coxa (C) upright, short; prefemur (PF) much shorter than femorite; femorite (F) 3/5 acropodite length, upright, narrow at base, thickening abruptly towards apex; main femoral process (MFP) 1/3 femorite length, narrow, pointed; second femoral process (fp1) absent; prolongation of femorite (prof), narrow, upright, pointed; solenomere (S) short, forming small circle, thinner than femorite, generally of similar thickness along length, narrowing 2/3 along its length to broaden slightly again at its tip; solenomere tip asymmetrical with slight point; solenomere process (sp1) at solenomere tip, tiny, pointed; second solenomere process (sp2) near solenomere tip, broad, jagged (Figs 14 C–E).

Female: unknown.

Distribution. This species is known from only one site, situated north-west of the town of Tom Price (Fig 17).

Etymology. This species is very small, with simple gonopods (Latin, noun, filiolus, little son).