Geotypodon iringensis, Enghoff, 2016

Enghoff, Henrik, 2016, A mountain of millipedes III: A new genus for three new species from the Udzungwa Mountains and surroundings, Tanzania, as well as several ‘ orphaned’ species previously assigned to Odontopyge Brandt, 1841 (Diplopoda, Spirostreptida, Odontopygidae), European Journal of Taxonomy 177, pp. 1-19 : 14-16

publication ID

https://doi.org/ 10.5852/ejt.2016.177

DOI

https://doi.org/10.5281/zenodo.3850251

persistent identifier

https://treatment.plazi.org/id/0137952B-7539-CB13-6A1B-C433FAE9447E

treatment provided by

Valdenar

scientific name

Geotypodon iringensis
status

gen. et sp. nov.

Geotypodon iringensis View in CoL gen. et sp. nov.

urn:lsid:zoobank.org:act:0171D40F-1E0D-4194-8D1B-045D46F92095

Figs 1 View Fig , 3 View Fig , 6 View Fig

Diagnosis

A species of Geotypodon gen. nov. in which the gonopod coxal metaplica is apically rounded, the telomere is apically divided into a small posterior lobe and a large anterior lobe, which gives rise to a strongly curved terminal lobe, and the limbus lobes are pointed triangular.

Etymology

The species is named after the type locality.

Material studied (total: 2 ♂♂)

Holotype

TANZANIA: ♂, Iringa Region, 10 km E of Iringa city, 7°46' S, 35°42' E, Mar.–Apr. 1996, L.L. Sørensen leg. ( ZMUC00046993 View Materials ).

GoogleMaps

Paratype

TANZANIA: 1 ♂, same data as holotype (ZMUC00046994).

Type locality

TANZANIA: Iringa Region, 10 km east of Iringa city, 7°46' S, 35°42' E.

Description

SIZE. Length ca. 9 cm. Diameter 6.0– 6.1 mm. 61–67 podous rings, no apodous rings in front of telson.

COLOUR. After 19 years in alcohol uniform greyish; posterior part of metazona amber, legs and antennae dark brownish.

HEAD. Without peculiarities.

COLLUM. With a marginal and a submarginal furrow.

BODY RINGS. Almost perfect cylinders, not vaulted; suture straight; ozopores ca. three diameters behind suture.

LIMBUS ( Fig. 6 View Fig ). With sharply pointed lobes.

ANAL VALVES. Each with a well-developed dorsal spine and a smaller, yet distinctive ventral one, margin raised, with 3 setae not borne on tubercles.

MALE LEGS. From 4 th pair with postfemoral and tibial pads on all legs, except last few pairs where only postfemoral pads are present.

torsotope. Scales: A–D = 0.2 mm, E = 0.01 mm. GONOPOD COXA ( Fig. 6 View Fig ). Basally parallel-sided, with antero-lateral concavity (lc) ( Fig. 6A View Fig ). Proplica ending in small proplical lobe (hidden behind anterior edge of metaplica on Fig. 6A View Fig ). Metaplica with poorly developed basal anteriad flange (mf) ( Fig. 6A View Fig ), distally regularly rounded and projecting laterad as semicircular lobe; metaplica at level of proplical lobe, with a long, latero-basad process (msp) on anterior side of coxa ( Fig. 6 View Fig A–B); process straight and slender in anterior view, slightly curved and broader in lateral view.

GONOPOD TELOPODITE ( Fig. 6 View Fig ). Arculus 90°. Torsotope (tt) simple, compact, without processes ( Fig. 6A View Fig ). Posttorsal narrowing (pn) pronounced, very slender, without processes or spines ( Fig. 6A View Fig ). Telopodite just distal to posttorsal narrowing dividing into slender, whip-like solenomere and complicated telomere. Solenomere (slm) curved in 3 dimensions (at least on preserved specimens), apically pointed, without any outgrowths ( Fig. 6 View Fig A–D). Efferent groove continuing from posttorsal narrowing onto solenomere and running all the way to its tip. Telomere with short, dark basal spine (pts) ( Fig. 6B View Fig ) and a basal lamella (bl) ( Fig. 6A View Fig ), followed by a slender part formed by a longitudinally folded lamella (lfl) with irregular edges ( Fig. 6 View Fig B–C); distal part divided into a slender posterior lobe (ptl) and a large, broad anterior lobe (atl) ( Fig. 6 View Fig A–B, D), the latter terminally giving rise to a slender, strongly curved terminal lobe (tl, curvature not visible on Fig. 6D View Fig ). An intermediate lamella (itl) lodged in the space between atl and plm ( Fig. 6B View Fig ).

Distribution and habitat

Known only from the environs of Iringa city. The altitude of the type locality will be at ca. 1600 m asl.

Coexisting species

No other odontopygid species were found together with G. iringensis gen. et sp. nov.

Notes

Geotypodon iringensis gen. et sp. nov. is very similar to G. multianulatus from Kenya, but there are differences, including that in G. multianulatus the gonopod coxa has a much larger, narrower and less rounded lateral lobe, and the solenomere has a small subdistal spine (cf. Discussion section).

Kingdom

Animalia

Phylum

Arthropoda

Class

Diplopoda

Order

Spirostreptida

Family

Odontopygidae

SubFamily

Archepyginae

Tribe

Prionopetalini

Genus

Geotypodon

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