Yia geminispina, Enghoff, 2016

Yia geminispina View in CoL gen. et sp. nov.

urn:lsid:zoobank.org:act:

Figs 5–6 View Fig View Fig

Diagnosis

( redundant, genus monotypic)

Etymology

The name is a composite Latin noun in apposition meaning “twin spine” and refers to the pair of long spines on the telomere.

Material studied (total: 1 ♂)

Holotype TANZANIA: ♂, Udzungwa Mts., Chita Forest Reserve [actually: Udzungwa Scarp F.R. ], 1100 m, 25 Oct. 1984, M. Stoltze & G. Petersen leg. ( ZMUC00047001 View Materials ).

Description (male)

SIZE. Length ca 4 cm, diameter 2.6 mm, 49 podous rings, no apodous rings in front of telson.

COLOUR. Faded, very faint traces of a broad, light dorsal stripe.

HEAD. Without peculiarities.

COLLUM. With a marginal and a submarginal furrow.

BODY RINGS ( Fig. 5A View Fig ). Almost perfect cylinders, not vaulted; suture with an extended, shallow anteriad sinus below ozopore level; ozopores ca three diameters behind suture.

ANAL VALVES. Each with a long, curved dorsal spine; marginal rim slightly raised, setiferous tubercles slightly protruding in a laterad direction (i.e., on very small ‘ravelins’).

OZOPORES. Starting from ring 6.

LIMBUS ( Fig. 5E View Fig ). With simple, slender-triangular lobes. Surface of lobes longitudinally microstriate.

MALE LEGS. With postfemoral and tibial ventral pads in anterior half of body, except for first few legpairs.

GONOPOD COXA ( Fig. 5 View Fig B–D). Slender and almost parallel-sided in anterior view. Proplica ( pp) simple, proplical lobe ( prl) not covered. Metaplica ( mp) with low, right-angled flange ( mf), above arculus with transverse shelf ( ms), laterally with triangular process ( lp), apically forming a small hood, or cucullus ( cu). A curved spine ( msp) originating between ms and cu.

GONOPOD TELOPODITE ( Fig. 6 View Fig ). Arculus 90°. Torsotope ( tt) simple, compact, without processes ( Fig. 6B View Fig ). Posttorsal narrowing ( pn) without processes or spines. Telopodite just distal to posttorsal narrowing dividing into solenomere and telomere. Solenomere ( slm) long, simple, whiplike, ca as long as telomere. Proximal part of telomere ( tlm) roughly broadly triangular; two very long, curved spines ( ts1, ts2) arising from small lobe on basal side of telomere, close to the origin of the solenomere; distal part of telomere drawn out into very long, very slender process ( tdp), one edge of tdp with a row of long, Y- or I-shaped spikes; tip of tdp complicated micro-spinose.

Distribution and habitat

Known only from the type locality.

Coexisting species

No other odontopygids were present in the sample containing the unique holotype, but a number of other species have been recorded from Udzungwa Scarp F.R.: Chaleponcus circumvallatus Enghoff, 2014 , C. hamerae Enghoff, 2014 , C. nikolajscharffi Enghoff, 2014 , Aquattuor sterosathe Enghoff, 2015 , A. udzungwensis Enghoff, 2015 , Prionopetalum asperginis Enghoff , 20XX and Casuariverpa scarpa gen. et sp. nov.