Antichiropus quaestionis 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 : 51

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Antichiropus quaestionis Car

n. sp.

Antichiropus quaestionis Car , n. sp.

( Figs 30 View FIGURE 30 A–F, 33)

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Type material examined. Australia: Western Australia: holotype male, 11.5 km W of Mt Elvire ( Pilbara Biological Survey site OYE08 ) 21°50’23”S, 116°40’37”E, 2 October 2005 – 30 August 2006 GoogleMaps , ethylene glycol pitfall trap, CALM staff ( WAM T144615 View Materials ) . Paratypes: 1 male (damaged), collected with holotype ( WAM T124597 View Materials ); 2 females, collected with holotype ( WAM T146837 View Materials ) GoogleMaps .

Diagnosis. Gonopod: A. quaestionis Car , n. sp. is similar to A. patriciae Car , n. sp. ( Fig26 View FIGURE 26 ): both have relatively short, slightly curved femorites.All other gonopod features, however, differ markedly in shape and number between the two species, most noticeably the main femoral process, relatively small, slender and pointed in A. quaestionis but long and bluntly rounded at the tip in A. patriciae . Antichiropus quaestionis has a small, slender, pointed second femoral process while the gonopod of A. patriciae carries a large second femoral process with an anvil-shaped process at its base. A. quaestionis has three processes on the solenomere, while A. patriciae has two.

Description. Male holotype: Body ca. 17.5 mm long, noticeably slender, midbody ring ca. 1 mm wide, with slight, smooth waist, prozonite and metazonite of similar widths, slight striations on lateral surfaces of body rings 3–5.

Colour (in alcohol) dark brown ( Fig 30A View FIGURE 30 ); leg colour similar to body. No paranota ( Fig 30B View FIGURE 30 ). Sternites without obvious processes/tubercles, sternal lamella broad, appears helmet-shaped. Leg coxal processes absent. Anterior spiracles at midbody, flat, tiny, ovoid.

Head smooth, with no sculpturing; frons smooth, with some setae; face narrow, maximum width ca. 3x the distance between antennal sockets; sockets separated by ca. 2x width of socket.

Antennae long, reaching to ring 3, not obviously clavate, antennomeres all similar.

Collum small, 0.5x as long as head (lateral view) ( Fig 30A View FIGURE 30 ).

Gonopod short, reaching ring 6; coxa (C) more robust, but of similar length to femorite, with slight ridge; prefemur (PF) 1/2 length of femorite, setose, with pronounced lip; femorite (F) 2/3 length of acropodite, slender at base, broadening suddenly mid-length; main femoral process (MFP) 1/4 femorite length, curved, pointed; second femoral process (fp1) longer than MFP, curved pointed; prolongation of femorite (prof) tiny, triangular, pointed; solenomere (S) relatively short, forming an open loop, generally broad but broadest at base, then narrowing slightly to end in a flattened tip; solenomere tip broad and flat, slightly pointed tip; solenomere process 1 (sp1) minute spine at solenomere tip; second solenomere process 1 (sp1) small spine at solenomere tip; second solenomere process (sp2) triangular process…with a hooked point; third solenomere process (sp3) pointed, bifurcate, close to solenomere tip (Figs 30A–F). Female: Similar to male holotype, but much broader and stouter (body width ca. 2 mm when viewed dorsally) (WAM T124597). Distribution. There are only four known individuals collected from one isolated site, Mt Elvire (Fig 33). Etymology. In posterior and medial views, the gonopod resembles a question mark (Latin, noun, quaestionis, question).


Western Australian Museum