Aquattuor denticulatus Frederiksen, 2013

Enghoff, Henrik, 2020, A mountain of millipedes VIII. The genus Aquattuor Frederiksen, 2013 revisited - a new species from the Udzungwa Mts, Tanzania, another from the Nguru Mts, and introduction of the first pair of male legs as a source of taxonomic characters (Diplopoda, Spirostreptida, Odontopygidae), European Journal of Taxonomy 626, pp. 1-32 : 11-12

Aquattuor denticulatus Frederiksen, 2013

Figs 1 , 4 D–F

Aquattuor denticulatus Frederiksen, 2013: 64 .

Diagnosis

Diameter 1.58–1.77 mm, 50–52 podous rings. Shares a short (as broad as long, or slightly longer) gonopodal palette with A. claudiahempae , A. fasciatus , A. stereosathe , A. submajor and A. udzungwensis . Differs from these species by having the subdistal part of the gonopodal telomere almost straight, parallel to the coxa, the telomere tip being bent abruptly laterad.

Material studied (total: 1 ♂) TANZANIA • 1 ♂, paratype; Tanga Region, Muheza District, East Usambara Mts, Amani , at Sigi

River; 500 m a.s.l.; 7 Feb. 1977; H. Enghoff, O. Lomhodlt and O. Martin leg.; NHMD 621640 [=ZMUC 00020528].

Descriptive notes

First pair of male legs ( Fig. 4 D–F) each with a single, finger-shaped prefemoral process; setae of telopodite distal to prefemur similar in length to those of normal walking legs.

Distribution

Known only from the type locality, Tanga Region, Muheza District, E Usambara Mts, Amani.Altitudinal range: 500– 1000 m a.s.l. ( Frederiksen 2013).

Figures

Fig. 1. Collecting sites for Aquattuor spp. in the Udzungwa Mts. Based on Marshall et al. (2010: fig. 1); inset by permission of the Eastern Arc Mountains Conservation Endowment Fund.

Fig. 4. A–C. Aquattuor nguruensis sp. nov., holotype, ♂ (VMNH110617), first pair of legs. Notice mite larva (”hypopus”) on left femur. D–F. A. denticulatus Frederiksen, 2013, paratype, ♂ (NHMD 621640), left leg of first pair. A, D. Anterior view. B, E. Sublateral view. C, F. Sub-ventral view. Abbreviation: pfd = prefemoral depression. Scale bars = 0.1 mm.