Antichiropus georginae 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 : 31-33

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Antichiropus georginae Car

n. sp.

Antichiropus georginae Car , n. sp.

( Figs 16 View FIGURE 16 , 17 View FIGURE 17 A–F)


Type material examined. Australia: Western Australia: holotype male (damaged), 26 km WNW of Mt Berry , site WYE08, 22°25’31.1”S, 116°12’55.1”E, May 2004, ethylene glycol pitfall traps, CALM staff (Pilbara Biological Survey) ( WAM T145175 View Materials ) . Paratypes: 1 female, collected with holotype ( WAM T76076 View Materials ) 33.4 km SW. of); 1 male (badly damaged), 2 female, Mt Stuart Station , NE of the homestead, site WYE11, 22°24’29”S, 116°22’18”E, 26 November 2003 – 2 May 2004, ethylene glycol pitfall traps, CALM GoogleMaps staff (Pilbara Biological Survey) ( WAM T75680 View Materials ) .

Other material examined. Australia: Western Australia: 1 male (damaged), Barlee Range Nature Reserve , site BR7 , 23°22’45”S, 115°52’50”E, 11–14 June 1994, dry pitfall traps, P.G. Kendrick and G.W. Kendrick ( WAM T71989 View Materials ) GoogleMaps ; 1 male (badly damaged), Mt Stuart station , E of the homestead, site WYE10, 22°25’48”S, 116°16’47”E, 26 November 2003 – 2 May 2004, ethylene glycol pitfall traps, CALM GoogleMaps staff ( Pilbara Biological Survey ) ( WAM T76144 View Materials ) ; 1 female (damaged), Pilbara Biological Survey site WYE 10, Mt Stuart Station , E. of homestead, 22°25’48”S, 116°16’47”E, 26 November 2003 – 2 May 2004, wet pitfall trap, CALM GoogleMaps staff ( Pilbara Biological Survey ) ( WAM T76157 View Materials ) .

Diagnosis. Gonopod: Antichiropus georginae Car , n. sp. is very similar in appearance to A. uvulus Car , n. sp. ( Fig 38 View FIGURE 38 ): A. georginae has, however, a small pointed process at the base of the main femoral process (anterior view) lacking in A. uvulus . The main femoral process is nearly half the length of the solenomere on the A. georginae gonopod but only 1/3 of solenomere length in A. uvulus .

Description. Male holotype: Body ca. 25 mm long; midbody ring ca. 2 mm wide, with distinct, smooth waist, prozonite and metazonite of similar width.

Colour (in alcohol) chestnut brown, cream ventrally ( Fig 17A View FIGURE 17 ): leg colour, pale yellow-brown with chestnut brown tips. No paranota ( Fig 17B View FIGURE 17 ).

Sternites without obvious processes/tubercles, sternal lamella square. Leg coxal processes absent. Anterior spiracles at midbody, small, ovoid, flat.

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

Antennae short, reaching to collum, antennal segments of similar length and width.

Collum slightly shorter than head (in lateral view) ( Fig 17A View FIGURE 17 ).

Gonopod short, reaching ring 6; coxa (C) slightly broader than femorite, with slight ridge on anterior surface; prefemur (PF) much shorter than femorite, setose, prefemoral lip pronounced; femorite (F) 2/3 acropodite length, upright, slightly thicker at apex; main femoral process (MFP) curved in the same orientation as solenomere, at least 2/3 femorite length, slightly broader at distal end, bird beak shaped with distinct asymmetrical point; second femoral process (fp1), small pointed process at base of the MFP, when viewed posteriory; second femoral process (fp1) absent; prolongation of femorite (prof) represented only by a transparent flange; femorite ending in a slight curve at distal end; solenomere (S) relatively short, broad and bulbous at base, dipping towards femorite, then forming an L-shape, narrowing to a distinct ‘waist’ near distal end, before terminating in a pincer-like structure; solenomere process (sp1) at solenomere tip, very small, upright pointed,; second solenomere process (sp2) near solenomere tip, relatively broad, pointed, leaf-shaped, forming pincer-like structure with solenomere tip ( Figs 17 View FIGURE 17 C–F).

Female: Similar to the male, but generally more robust with shorter legs (WAM T75680 View Materials ).

Distribution. This species is known from a small area of the Pilbara, mainly Mt Stuart Station ( Fig 17 View FIGURE 17 ).

Etymology. This species is named for Georgina Lambert, a dedicated volunteer in the Arachnology section of the Western Australian Museum.


Western Australian Museum