Calyptomastix ingemanni, Enghoff, 2022

Calyptomastix ingemanni View in CoL sp. nov.

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Figs 1 View Fig , 14–16 View Fig View Fig View Fig

Diagnosis

Differs from other species of Calyptomastix by the combination of having a post-torsal spine (= postfemoral spine of Hoffman & Howell 2012) lacking a proper lateral metaplical process but instead having a more apical posteriad triangular process and a small fingerlike process in the cavity of the cucullus.

Etymology

After my grandson Ingemann Andreas Enghoff Mogensen.

Material examined (total 2 ♂♂)

Holotype TANZANIA • ♂; Kilimanjaro Region, Mwanga District, North Pare mountains , Kiverenge FR; 03°48′41.0″ S, 37°38′52.5″ E; 1563 m a.s.l.; 14 May 2011; S. Frederiksen leg.; NHMD 621715 . GoogleMaps

Paratype TANZANIA • 1 ♂; same collection data as for holotype; NHMD 621716 GoogleMaps .

Description (male)

SIZE. Length 45–47 mm, diameter 2.6–2.8 mm, 68–69 podous rings, no apodous rings in front of telson.

COLOUR. Uniform dark grey, posterior part of metazonites amber, a dorsal yellow stripe. Head except clypeal region, collum, antennae and preanal ring dark brownish grey; clypeal region and anal valves reddish brown. Legs yellowish.

SUPRALBRAL SETAE. 4.

MANDIBULAR STIPES. With triangular disto-ventral lobe, distal margin hence concave.

ANAL VALVES. With very small dorsal spine, no ventral spine or corner, margins not raised, each with 3 sessile setae.

LIMBUS ( Fig. 15F View Fig ). With rounded-triangular, striate lobes.

LEGS. Postfemoral and tibial pads on post-gonopodal legs, pads diminishing and eventually disappearing towars posterior end.

FIRST PAIR OF LEGS ( Fig. 14A–C View Fig ). Prefemoral lobes relatively long, slender-triangular in ventral view. Two to three coxosternal setae ( CXS) close to lateral margin of coxosternum, well separated from prefemoral lobes. Prefemora with two short mesapical setae ( APS) and a scattering of peglike sensilla ( LPS) extending to tip of prefemoral lobe.

STERNUM 9 ( Fig. 14D View Fig ). In the shape of a transverse, parallel-sided, slightly curved band.

GONOPOD COXA ( Fig. 15A–E View Fig ). Proplica ( PP) slender, almost parallel-sided, simple, with a relatively large proplical lobe ( PPL) distally. Metaplica ( MP) simple, without a basal metaplical flange, subdistally with a posteriad, pointed triangular process ( mtp). Cucullus ( CU) apically with slender, fingerlike process ( fp) facing proplical lobe.

GONOPOD TELOPODITE ( Fig. 16 View Fig ). Arculus 90º. Torsotope ( TT) extended, post-torsal narrowing ( PN) not very pronounced. A long, stout post-torsal spine ( PTS) making more than a full turn around post-torsal

area. Solenomere ( SLM) slender, simple, relatively short, all but completely hidden within telomere, tip fluted. Telomere ( TM) in anterior and basal views ( Fig 16B, D View Fig ) appearing as a simple, oblong, distally expanded structure (in outline vaguely resembling the cartoon character Horace Horsecollar); in posterior, ventral, and mesal views ( Fig. 16A, E, C View Fig ) with several convoluted membranes, among which the tip of the solenomerite sticks out.

Distribution

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

Remarks

The small fingerlike process ( fp) facing the proplical lobe reminds of the condition in several species of the genus Helicochetus Attems, 1909 , see, e.g., Enghoff (2016: figs 5–6). The telopodites of the two genera are, however, vastly different.