Boreohesperus undulatus, Car, Catherine A. & Harvey, Mark S., 2013

Car, Catherine A. & Harvey, Mark S., 2013, A review of the Western Australian keeled millipede genus Boreohesperus (Diplopoda, Polydesmida, Paradoxosomatidae), ZooKeys 290, pp. 1-19 : 14-16

Boreohesperus undulatus sp. n. Figs 1F89

Type material.

Holotype male: 3.5 km N. of Karratha Station, Pilbara Biological Survey site DRW05, Western Australia, Australia, 20°51'14.1"S, 116°40'07.9"E, May 2004, CALM Pilbara Survey (WAM T76056).

Paratypes: 4 males, 1 female and 1 juvenile, same data as holotype (WAM T126119); 1 male and 1 female, 11 km ESE. of Marda Pool, Pilbara Biological Survey site DRW07, Western Australia, Australia, 21°03'20.4"S, 116°15'06"E, May 2004, CALM Pilbara Survey (WAM T76072).

Etymology.

This species is named for the shape of the gonopods (undulatus, Latin, adjective, wavy).

Diagnosis.

This species is similar to Boreohesperus delicatus sp. n., but the gonopod is slightly larger and the shape of the non- seminiferous branch and femorite together is much broader (spindle shaped) than that of Boreohesperus delicatus (Fig. 8F). In addition, the gonopod of Boreohesperus undulatus sp. n.carries a posterior process (Fig. 8C),lacking in Boreohesperus delicatus sp. n. The presence of a posterior process also distinguishes this species from Boreohesperus furcosus sp. n., although Boreohesperus dubitalis sp. n. also carries this posterior process. Boreohesperus undulatus sp. n. is, however, much smaller than Boreohesperus dubitalis sp. n., and the solenomere process found on the male gonopod of Boreohesperus undulatus sp. n., while present (Fig. 8E), as it is in Boreohesperus dubitalis sp. n., is much shorter than the relatively long finger-like solenomere process found on Boreohesperus dubitalis sp. n. (Fig. 6E).

Description.

Holotype male: body approximately 7 mm long; mid-body ring approximately 0.75 mm wide dorsally with distinct waist between prozonite and metazonite; legs of moderate length, approximately equal to length of 1 to 2 mid-body rings. Colour bleached by alcohol. Paranota on all but first few body rings small. Sternites, other than those of fifth body ring, with no noticeable features. Anterior spiracles at mid-body flat circular. Antennae distinctly clavate, of moderate length, extending approximately to first body ring behind collum (to body segment 2), antennomeres relatively robust. Gonopod long, extending at least to fifth body ring; coxa (C) much broader than acropodite, and approximately 2 × as long as broad; prefemur (PF) short, sub-globose; femorite (F) short, one-quarter to one-third length of acropodite; noticeably narrower at base, then broadening; non-seminiferous branch (NSB) noticeably broadest at solenomere base then narrowing to form broad spindle shape with pointed tip; process on medial surface of NSB (nsbp) pointed, arising closer to NSB tip than to solenomere base (sb), and much shorter than NSB, extending just beyond branch tip; solenomere (S) relatively long and slender, arising closer to prefemur than to NSB tip, forming distinct ‘S’ shape when viewed in any orientation; solenomere tip divided into two, main pointed ribbon like forks, with third small spine-like process (stp) appearing to arise between main forks solenomere process (sp) present, short; separate posterior process (pp) arising near bs, long, slender, pointed and approximately half solenomere length.

Female: Similar to male, except for genitalic features.

Distribution.

This species has been collected from two localities in the Pilbara: Karratha Station and Marda Pool, situated ca. 50 km apart (Fig. 9).