Antichiropus echinus 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 : 26-28

publication ID

https://doi.org/ 10.11646/zootaxa.4617.1.1

publication LSID

lsid:zoobank.org:pub:50F4058E-2871-4B5B-97D2-1CB216841C1E

persistent identifier

https://treatment.plazi.org/id/02A83263-7BB3-4297-B81F-8C934A226552

taxon LSID

lsid:zoobank.org:act:02A83263-7BB3-4297-B81F-8C934A226552

treatment provided by

Plazi

scientific name

Antichiropus echinus Car
status

sp. nov.

Antichiropus echinus Car , n. sp.

( Figs 13 View FIGURE 13 A–F, 16)

ZooBank: urn:lsid:zoobank.org:act:02A83263-7BB3-4297-B81F-8C934A226552

Type material examined. Australia: Western Australia: holotype male, 13 km SSW. of Giles Point, Pilbara Biological Survey site RHNC 01 , 23°21’40”S, 119°06’44”E, May 2004, CALM GoogleMaps staff (Pilbara Biological Survey) ( WAM T144610 About WAM ). Paratype: 1 female (damaged) , collected with holotype ( WAM T76075) .

Other material examined. Australia: Western Australia: 1 male, collected with holotype ( WAM T 112620, GenBank accession number 12S, MK 735759 View Materials ) ; 1 juvenile (damaged), collected with holotype ( WAM T146708 About WAM ) .

Diagnosis. Gonopod: Antichiropus echinus Car , n. sp. is similar to two other species from the Pilbara region, A. gibbus Car , n. sp. ( Fig 18 View FIGURE 18 ) and A. hystricosus Car , n. sp. ( Fig 19 View FIGURE 19 ); in each of the three species, the base of the solenomere is studded with short spines. Antichiropus gibbus is easily distinguishable by its femorite that carries a pronounced, rounded protuberance in its apical 1/3, entirely lacking in the other two species. Antichiropus echinus has a slender, pointed solenomere tip while that of A. hystricosus is relatively broad and pointed.

Description. Male holotype: Body ca. 15 mm long; midbody ring ca. 1.5 mm wide, with smooth waist, metazonite of similar width to prozonite; noticeable transverse furrow dorsally on metazonite. Colour (in alcohol) uniform dark brown, paler ventrally ( Fig 13A View FIGURE 13 ): legs slightly lighter than body. No paranota ( Fig 13B View FIGURE 13 ).

Sternites without obvious processes/tubercles, sternal lamella distinctive two-lobed heart-shaped. Leg coxal processes absent. Anterior spiracles at midbody, small, ovoid, flat.

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

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

Collum 1x as long as head (in lateral view) ( Fig 13A View FIGURE 13 ).

.

Gonopod of medium length, reaching posterior edge of ring 5; coxa much more robust, shorter, than femorite, with slight ridge on anterior surface (not shown in Fig 13 View FIGURE 13 ); prefemur (PF) 1/2 length of femorite, setose, with pronounced lip; femorite (F) 2/3 curving, generally broadening to apex; triangular protuberance (tp) at base of F (not labelled in Figure 13 View FIGURE 13 ); main femoral process (MFP) at least 1/3 of femorite length, pointed; prolongation of femorite (prof) relatively slender, L-shaped, triangular, pointed; solenomere (S) long, forming>1 loop/circle, ribbon-like, curved back on itself, narrowing towards tip, distinctive teeth (St) at solenomere base; solenomere tip flattened, pointed; solenomere process (sp1) 2/3 along length of solenomere, relatively long and pointed ( Figs 13 View FIGURE 13 C–F).

Female: Similar to the male but slightly broader (ca. 2 mm) and stouter (lateral view) with shorter, more slender legs (WAM T76075).

Distribution. The few specimens collected were all found at the same time from near Giles Point in the Pilbara ( Fig 16 View FIGURE 16 ).

Etymology. The species’ name refers to the spines at the base of the solenomere (Latin, noun, echinus , hedgehog).

WAM

Western Australian Museum

MK

National Museum of Kenya

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