Lamelloramus frederiksenae, 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 : 63-65

Lamelloramus frederiksenae sp. nov.

urn:lsid:zoobank.org:act:A324AFEE-BAD1-4DB6-B10F-4E45999F5FC0

Figs 6 , 40–42

Diagnosis

Differs from other species of Lamelloramus , including the undescribed one from Mt. Kilimanjaro mentioned above, by the presence of a very long basal solenomeral spine (BSS) (vs absent or very short in other species) as well as in the outline of the “side-branching telomeric lamella” and the detailed shape of the gonopod coxa.

Etymology

After Sara B. Frederiksen who described the genus Lamelloramus ( Frederiksen 2013b) .

Material examined (total 1 ♂)

Holotype TANZANIA • ♂; Morogoro Region, Uluguru South FR , forest above Linzi village; 07°06′ S, 37°40′ E; Nov. 1993; The Uluguru Biodiversity Survey leg.; NHMD 621744 .

Description (male)

SIZE. Length 49 mm, diameter 3.3 mm, 55 podous rings, no apodous rings in front of telson.

COLOUR. After 25 years in alcohol all faded.

SUPRALABRAL SETAE. 6.

MANDIBULAR STIPES. Distal margin distinctly concave-bilobed.

ANAL VALVES. With well-developed dorsal spine, no ventral spine, margins not raised, each with three sessile setae.

LIMBUS ( Fig. 41E ). With simple, triangular lobes (strongly worn on unique specimen).

LEGS. Ventral pads on postfemur and tibia from leg-pair 4, diminishing and eventually disapperaring towards posterior.

FIRST PAIR OF LEGS ( Fig. 40A–C ). Prefemoral lobes broad, triangular in ventral view. One to three coxosternal setae (CXS) close to lateral margin of coxosternum, well separated from prefemoral lobes. Prefemora with two short mesapical setae (APS), lateral setae absent or indistinct.

STERNUM 9 ( Fig. 40D ). Large, in the shape of an inverted triangle on a stout foot, with an irregular keel from bottom to top.

GONOPOD COXA ( Fig. 41A–D ). Quite stout, margins shallowly sinuous. Proplica (PP) with shallowly sinuous mesal margin, proplical lobe hidden under anterior metaplical lobe (ml). Metaplical flange (MF) without a process. Metaplica (MP) forming apical ‘crown’ with a system of ridges delimiting two broad troughs (tr1, tr2), one shallow, one deep; on anterior side forming broad basad lobe (ml) covering proplical lobe; on lateral side with semicircular lobe (mll).

GONOPOD TELOPODITE ( Fig. 42 ). Arculus 90°. Torsotope (TT) compact, with a long post-torsal spine (PTS). Post-torsal narrowing (PM) not very pronounced, relatively short. Solenomere (SLM) very long, longer than telomere, whiplike, with an exceptionally long, first straight, then strongly curved basal spine (BSS) otherwise without any outgrowths; solenomere making a large U-bend on dorsal side of telomere, apically fluted and spiralled ( Fig. 42F–G ). Telomere (TM) relatively simple, mesally dividing into a broadly rounded-triangular mesad(-posteriad) lamella (stl = “side-branching telomeric lamella” sensu Frederiksen 2013b ), and a long bandlike, tapering process (tp) which turns laterad and then makes an almost complete loop in a plane perpendicular to main axis of telopodite.

Distribution and habitat

Known only from the Uluguru South FR.

Figures

Fig. 6. Odontopygid gonopod terminology, telopodite, exemplified by Lamelloramus frederiksenae sp. nov., holotype, ♂ (NHMD 621744), left gonopod telopodite. A. Anterior view, “90°” indicates arculus. The double-headed arrow indicates the torsotope. B. Posterior view. Abbreviations: BA =basomere (yellow); BSS=basal solenomeral spine (light green);PN =post-torsal narrowing;PTS = post-torsal spine (orange); SLM =solenomere (medium green);TM =telomere (blue);TT =torsotope. Scale bars =0.2 mm. Cf. Fig. 42.

Fig. 40. Lamelloramus frederiksenae sp. nov., holotype, ♂ (NHMD 621744). A–C. First pair of legs. A. Sublateral view. B. Anterior view. C. Ventral view. D. Sternum 9. Abbreviations: APS=mesapical prefemoral setae; CXS = coxosternal setae. Scale bars =0.1 mm.

Fig. 41. Lamelloramus frederiksenae sp. nov., holotype, ♂ (NHMD 621744). A–D. Left gonopod coxa. A. Anterior view. B. Mesal view. C. Posterior view. D. Distal view (lateral side to the right). E. Midbody dorsal limbus. Abbreviations: MF=metaplical flange; ml =metaplical lobe; mll =metaplical lateral lobe; MP=metaplica; PP =proplica; tr1, tr2 =apical metaplical troughs. Scale bars: A–D=0.1 mm; E =0.01 mm.

Fig. 42. Lamelloramus frederiksenae sp. nov., holotype, ♂ (NHMD 621744), left gonopod telopodite. A. Anterior view.B. Posterior view.C. Distal (ventral) view.D. Sub-dorsal view (grey area in lower right covered by mounting tape). E. Dorso-anterior view. F–G. Solenomere tip. Abbreviations: BSS=basal solenomeral spine; PN =post-torsal narrowing; PTS =post-torsal spine; SLM =solenomere; stl = ‘sidebranching telomeric lamella’; TM =telomere; tp = telomeral process. Scale bars: A–E =0.2 mm; F =0.05 mm; G =0.02 mm.