Calyptomastix vuasu, Enghoff, 2022

Enghoff, Henrik, 2022, Mountains of millipedes. The family Odontopygidae in the Eastern Arc Mountains of Tanzania (Diplopoda, Spirostreptida), European Journal of Taxonomy 803, pp. 1-136 : 29-31

Calyptomastix vuasu sp. nov.

urn:lsid:zoobank.org:act:FD6512DA-4C6A-47F5-A8AC-A2EBF0B1C678

Figs 17–18

Diagnosis

Differs from other species of Calyptomastix by the combination of having a post-torsal spine (= postfemoral spine of Hoffman & Howell 2012) having the lateral coxal process in a subapical position and having a posteriad triangular process at the same level.

Etymology

The historical name used for the South Pare Mountains by its inhabitants. Noun in apposition.

Material examined (total 1 ♂)

Holotype TANZANIA • ♂ (head and rings 1–6 missing); Kilimanjaro Region, Same District, South Pare Mountains , Chome FR; 8 May 2011; S. Frederiksen leg.; NHMD 621717 .

Description (male)

SIZE. Diameter 3.4 mm, 74 podous rings, no apodous rings in front of telson.

COLOUR. Overall greyish brown, posterior part of metazonites amber, a clear yellow dorsal stripe. Telson dark brown, legs yellow.

ANAL VALVES. Only a tiny indication of a dorsal spine, no ventral spine or ‘corner’; margins not raised, each with 3 sessile setae.

LIMBUS ( Fig. 17D ). With pointed-triangular, striate lobes, ca twice as long as broad.

LEGS. Postfemoral and tibial pads well-developed on anterior post-gonopodal legs, diminishing and disappearing towars posterior.

STERNUM 9. ( Fig. 18H ). Subquadratic, with a transverse depression slightly below middle.

GONOPOD COXA ( Fig. 17A–C ). Proplica (PP) slender, almost parallel-sided, simple, with a relatively large proplical lobe (PPL) distally and a lateral short, triangular process (LCS) ca at same level. Metaplica (MP) simple, with a poorly demarcated basal metaplical flange (MF), subdistally with a posteriad, rounded triangular process (mtp). Cucullus (CU) triangular, no fingerlike process facing proplical lobe.

GONOPOD TELOPODITE ( Fig. 18A–G ). Arculus 90°. Torsotope (TT) extended, post-torsal narrowing obscured by long, stout post-torsal spine (PTS) making more than a full turn around post-torsal area. Solenomere (SLM) shorter than, and nested in cavity of telomere, taeniate, pointed, with stout basal solenomeral spine (BSS) and a subdistal flange (fl) on posterior side. Telomere (TM) relatively simple, curved podshaped, forming a regular 180° curve; external surface smooth, internally with several irregular membranes.

Distribution

Known only from the type locality in the South Pare Mts.

Figures

Fig. 17. Calyptomastix vuasu sp. nov., holotype, ♂ (NHMD 621717). A–C. Left gonopod coxa. A. Anterior view. B. Mesal view. C. Posterior view. D. Midbody dorsal limbus. Abbreviations: CU =cucullus; LCS = lateral coxal process; MP=metaplica; mtp = metaplical triangular process; PP= proplica; PPL =proplical lobe. Scale bars: A–C =0.2 mm; D =0.01 mm.

Fig. 18. Calyptomastix vuasu sp. nov., holotype, ♂ (NHMD 621717). A–F. Left gonopod telopodite. A. Anterior view. B. Ventral view. C. Posterior view. D. Dorsal view. F. Mesal view. G. Right gonopod solenomere. H. Sternum 9. Abbreviations: BSS=basal solenomeral spine; fl=flange; PTS = post-torsal spine; SLM =solenomere;TM =telomere;TT =torsotope. Light blue areas obscured covered by mounting tape. Scale bars: A–F, H = 0.1 mm; G not to scale.