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A Review of the Western Australian Keeled Millipede Genus Boreohesperus (Diplopoda, Polydesmida, Paradoxosomatidae)

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A Review of the Western Australian Keeled Millipede Genus Boreohesperus (Diplopoda, Polydesmida, Paradoxosomatidae)

Catherine A Car et al. Zookeys.

Abstract

A taxonomic review of the endemic Western Australian millipede genus Boreohesperus Shear is presented in which six species are recognized: the type species, Boreohesperus capensis Shear, 1992, from North-West Cape, one new species, Boreohesperus dubitalis, from Barrow Island and four more new species from the Pilbara region, Boreohesperus curiosus, Boreohesperus delicatus, Boreohesperus furcosus and Boreohesperus undulatus. All six species have highly localized distributions, consistent with being short-range endemics. The nomenclature of the branches of the male gonopod is revised.

Keywords: Morphology; biodiversity; new species; short-range endemics; taxonomy.

Figures

Figure 1.
Figure 1.
Size comparison of the left gonopod (posterior view), of six Boreohesperus species: A Boreohesperus capensis Shear, 1992 B Boreohesperus curiosus sp. n. C Boreohesperus delicatus sp. n. D Boreohesperus dubitalis sp. n. E Boreohesperus furcosus sp. n. F Boreohesperus undulatus sp. n. Scale bars = 0.5 mm.
Figure 2.
Figure 2.
Boreohesperus capensis Shear, 1992. A–B Male (WAM T44397) habitus: A lateral view B dorsal view C–F Male (WAM T44397) left gonopod: C posterior view D anterior view E medial view F lateral view. bs solenomere base C coxa F femur NSB non-seminiferous branch PF prefemur S solenomere. Scale bars: A–B = 2 mm; C–F = 0.5 mm.
Figure 3.
Figure 3.
Boreohesperus curiosus sp. n. A–B Holotype male (WAM T124633) habitus: A,lateral view B dorsal view C–F Holotype male left gonopod: C posterior view D anterior view E medial view F lateral view. bs solenomere base C coxa F femur NSB non-seminiferous branch nsbp non-seminiferous branch process PF prefemur S solenomere stp solenomere tip process. Scale bars: A =1 mm; B = 0.5 mm; C–F = 0.2 mm.
Figure 4.
Figure 4.
Boreohesperus delicatus sp. n. A–B Holotype male (WAM T76070) habitus: A lateral view B dorsal view C–F Holotype male left gonopod: C posterior view D anterior view E medial view F lateral view. bs solenomere base C coxa F femur NSB non-seminiferous branch nsbp non-seminiferous branch process PF prefemur S solenomere stp solenomere tip process. Scale bars: A = 1 mm; B = 1 mm; C–F = 0.2 mm.
Figure 5.
Figure 5.
Boreohesperus dubitalis sp. n., living male (WAM T126113) (approx. 10 mm long) on Barrow Island. Image courtesy of K. Cullen.
Figure 6.
Figure 6.
Boreohesperus dubitalis sp. n. A Male (WAM T123094) habitus, lateral view B Holotype male(WAM T57637) habitus, dorsal view C–F Holotype male left gonopod: C posterior view D anterior view E medial view F lateral view. bs solenomere base C coxa F femur NSB non-seminiferous branch nsbp non-seminiferous branch process PF prefemur pp posterior process S solenomere sp solenomere process. Scale bars: A = 1 mm; B = 1 mm; C–F = 0.2 mm.
Figure 7.
Figure 7.
Boreohesperus furcosus sp. n. A–B Holotype male (WAM T76078) habitus: A lateral view B dorsal view C–F Holotype male left gonopod: C posterior view D anterior view E medial view F lateral view. bs solenomere base C coxa F femur NSB non-seminiferous branch nsbp non-seminiferous branch process PF prefemur S solenomere sp solenomere process stp solenomere tip process. Scale bars: A = 1 mm; B = 0.5 mm; C–F = 0.2 mm.
Figure 8.
Figure 8.
Boreohesperus undulatus sp. n. A–B Holotype male (WAM T76056) habitus: A lateral view B dorsal view C–F Holotype male left gonopod: C posterior view D anterior view E medial view F lateral view. bs solenomere base C coxa F femur NSB non-seminiferous branch nsbp non-seminiferous branch process PF prefemur pp posterior process S solenomere sp solenomere process stp solenomere tip process. Scale bars: A = 1 mm; B = 0.5 mm; C–F = 0.2 mm.
Figure 9.
Figure 9.
Map of the Pilbara region of north-western Australia showing distributions of Boreohesperus species.

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