Antichiropus hystricosus Car, 2019

Car, Catherine A., Harvey, Mark S., Hillyer, Mia J. & Huey, Joel A., 2019, The millipede genus Antichiropus (Diplopoda: Polydesmida: Paradoxosomatidae), part 3: species of the Pilbara bioregion of Western Australia, Zootaxa 4617 (1), pp. 1-71 : 35-36

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Antichiropus hystricosus Car

n. sp.

Antichiropus hystricosus Car , n. sp.

( Figs 19 View FIGURE 19 A–F, 25)


Type material examined. Australia: Western Australia: holotype male (slightly damaged), 24 km SE. of Paraburdoo, Pilbara Biological Survey site TCMBC05 , 23°19’06”S, 117°52’17”E, 30 August 2005 – 31 May 2006 GoogleMaps , ethylene glycol pitfall trap, CALM staff (Pilbara Biological Survey) ( WAM T124621 View Materials ) . Paratype: 1 male (damaged, many legs missing), collected with holotype ( WAM T144616 View Materials ) GoogleMaps .

Diagnosis. Gonopod: this species is most similar to A. cucumeraceous Car , n. sp. ( Fig 10 View FIGURE 10 ) but is easily distinguished from it by A. hystricosus Car , n. sp. having noticeable serrations at the base of the solenomere, lacking in the former species. Antichiropus gibbus Car , n. sp. ( Fig 18 View FIGURE 18 ) and A. echinus Car , n. sp. ( Fig 13 View FIGURE 13 ) have similar serrations but A. gibbus has a pronounced protuberance on its femorite which A. hystricosus lacks,, and A. echinus has a slender pointed solenomere tip, while that of A. hystricosus . is transparent, flattened and blunt.One of the most noticeable features of this species, however, is that it lacks a prolongation of the femorite.

Description. Male holotype: Body ca. 15 mm long, midbody ring ca. 1.5 mm wide, with shallow, smooth waist, prozonite and metazonite of similar widths, slight lateral striations, rings 7-5.

Colour (in alcohol) dark brown ( Fig 19A View FIGURE 19 ): legs relatively long, leg colour dark brown. No paranota ( Fig 19B View FIGURE 19 ).

Sternites without obvious processes/tubercles, sternal lamella medium width, heart-shaped. Leg coxal processes absent. Anterior spiracles at midbody tiny, ovoid, flat.

Head smooth, with no sculpturing; frons smooth, sparsely setose; face moderately 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, robust, barely clavate.

Collum ca. 0.75x length of head (lateral view) ( Fig 19A View FIGURE 19 ).

Gonopod of medium length, reaching ring 5; coxa (C) more robust but 1/2 femorite length, pronounced ridge on anterior surface; prefemur (PF) ovoid, lightly setose with slight lip; femorite (F) 2/3 length of acropodite, upright, slender at base, broadest mid-length, narrowing then broadening again at apex; main femoral process (MFP) long, slender, held at 45 degrees to femorite; second femoral process (fp1) absent; prolongation of femorite (prof) absent; solenomere (S) relatively long, forming a circle, narrowest at base then broadening, small spines at base; soleno- mere tip flattened, blunt; solenomere process (sp1) small, curved, slender, pointed, in apical 1/3 of solenomere (Figs 19C–F).

Female: unknown.

Distribution. Found only from one site SE of the mining town of Paraburdoo (Fig 25).

Etymology. This species is named for the small spines present at the base of the solenomere (Latin, adjective, hystricosus, thorny, prickly).


Western Australian Museum