Geotypodon submontanus, 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 : 12-14

Geotypodon submontanus gen. et sp. nov.

urn:lsid:zoobank.org:act:02DBFF6A-56A1-4EB3-9001-AF063F22C1B6

Figs 1 , 3 , 5

Diagnosis

A species of Geotypodon gen. nov. in which the gonopod coxal metaplica is produced mesad in a thin lamella, a small longitudinal lamella, perpendicular to the other, is present on the anterior part of the metaplica, the telomere is apically divided into two lobes of approximately equal size, and the limbus lobes are multi-cusped, hand-like. Shares these characters with G. millemanus gen. et sp. nov., but differs from that species in smaller size, bicuspid mesal margin of metaplical lamella and presence of a spine-like process on the posterior apical telomeral lobe.

Etymology

The name is a Latin adjective referring to the habitat.

Material studied (total: 1 ♂)

Holotype

TANZANIA: ♂, Iringa Region, Iringa District, Udzungwa Mts, West Kilombero Scarp FR, 07°53'19.5" S, 36°23'11.6" E, submontane forest, 1145 m asl, trapsite Ukami, casual, Nov. 2000, Frontier Tanzania leg. ( ZMUC00046992 ).

Type locality

TANZANIA, Iringa Region, Iringa District, Udzungwa Mts, West Kilombero Scarp FR, 07°53'19.5" S, 36°23'11.6" E, submontane forest, 1145 m asl, cf. Marshall et al. (2001).

Description

SIZE. Length ca. 7 cm. Diameter 3.8 mm. 60 podous rings, no apodous rings in front of telson.

OTHER CHARACTERS. As in G. millemanus gen. et sp. nov., with the following exceptions:

- telson (after 15 years in alcohol) yellowish,

- postfemoral and tibial pads on male legs smaller,

- metaplical lamella (mla) produced mesad, with two sharp angles ( Fig. 5 A–B),

- posterior distal lobe of telomere (ptl) apically with a dark, spine-like process ( Fig. 5E ).

Distribution and habitat

Known only from West Kilombero FR. Altitude: 1145 m asl. Habitat: submontane forest. lobe 0.01 mm.

of telomere; pts = proximal telomeral spine. Scales: A–D = 0.1 mm, E = 0.05 mm, F =

Coexisting species

No other odontopygids were found in the same sample as G. submontanus gen. et sp. nov., but G. millimanus gen. et sp. nov., Chaleponcus basiliscus Enghoff, 2014 , C. circumvallatus Enghoff, 2014 , C. gracilior , C. ibis Enghoff, 2014 , C. netus Enghoff, 2014 , C. tintin Enghoff, 2015 , Aquattuor longipala Enghoff, 2015 and A. udzungwensis Enghoff, 2015 also occur in West Kilombero FR.

Figures

Fig. 1. Map of the Udzungwa Mountains, showing the collecting sites for the three new Geotypodon species, as well as names of the Forest Reserves in question and names of individual mountains in West Kilombero FR. Red diamonds = G. millemanus gen. et sp. nov., yellow dot: G. submontanus gen. et sp. nov., blue triangle: G. iringensis gen. et sp. nov. Based on fig. 1 in Marshall et al. (2010) and information in Doody et al. (2001).

Fig. 3. Body size of males of Geotypodon spp. Bold symbols indicate numbers of podous rings and midbody vertical diameter of the new species described here. Small circles and shaded areas indicate

Fig. 5. Geotypodon submontanus gen. et sp. nov., holotype. A–E. Left gonopod. A. Anterior view. B. Posterior view. C. Apical part of coxa and proximal part of telopodite, anterior view. D. (Anterior-) mesal view. E. Posterior distal lobe of telomere; insertion highlights spine-like process. F. Limbus. Abbreviations: atl = anterior distal lobe of telomere; itl = intermediate distal lamella of telomere; ll = longitudinal lamella; mla = metaplical lamella; msp = metaplical spine-like process; ptl = posterior distal