Polydrepanum Carl, 1932

Sankaran, Pradeep M. & Sebastian, Pothalil A., 2018, A new species of and a new transfer from the millipede genus Polydrepanum Carl, 1932 (Polydesmida, Paradoxosomatidae, Polydrepanini), Zootaxa 4471 (1), pp. 169-178 : 170

publication ID

https://doi.org/ 10.11646/zootaxa.4471.1.8

publication LSID

lsid:zoobank.org:pub:5C14EA87-03AC-4BBC-B622-AB69EF6786C2

DOI

https://doi.org/10.5281/zenodo.5970296

persistent identifier

https://treatment.plazi.org/id/03AFD369-390B-1013-FF11-FEB6F92CFBAB

treatment provided by

Plazi

scientific name

Polydrepanum Carl, 1932
status

 

Genus Polydrepanum Carl, 1932 View in CoL

Diagnosis. Medium - sized (18–25 mm) Polydrepanini with a normal pore formula: 5, 7, 9, 10, 12, 13, 15-19. Body with 20 segments, metaterga conspicuously nodose. Head slightly wider than collum. Paranota weakly developed. Metazonites setose or not, with deep, beaded transverse sulcus. Pleural keels visible only on first few segments. Male tarsal brushes present. Male femora 1 & 2 or only 2 modified. A well-developed sternal lamella between male coxae 4. Gonopodal prefemur short. Gonopodal femorite with clear evidence of torsion except in P. fissum sp. nov., which has incomplete torsion of gonopodal femorite. Seminal groove running along dorsal face of femorite. Entire telopodite strongly torsate. A basal postfemoral process absent. Solenophore divided into several branches, distally sickle-shaped, showing only a lamina lateralis with a mesal extension. Solenomere long and flagelliform with a strong distal curvature, almost entirely enclosed by lamina lateralis ( Carl 1932; Attems 1937; Jeekel 1968; Golovatch 1984).

Type species: Polydrepanum tamilum Carl, 1932 , by monotypy.

Relationship. Within Polydrepanini , Polydrepanum seems to be particularly similar to the formally monotypic Indian genus Telodrepanum as both share the sickle-shaped solenophore and the distally curved, flagelliform solenomere ( Carl 1932: fig. 52; Golovatch 1984: fig. 8; herein Fig. 5A–B View FIGURE 5 ). However, Polydrepanum spp. can be distinguished from Telodrepanum spp. by the following combination of characters: solenomere sheathed by solenophore ( Telodrepanum spp. with solenomere not sheathed by solenophore), only distal part of solenophore sickle-shaped (entire solenophore in Telodrepanum spp. sickle-shaped) and lacking postfemoral process ( Telodrepanum spp. with anteriorly oriented postfemoral process) (see Carl 1932: figs 16–18, 52–54; Golovatch 1984: figs 8–11, 14–17; herein Figs 3E–F View FIGURE 3 , 4A–B View FIGURE 4 , 6A–B View FIGURE 6 ).

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