Polydrepanum Golovatch & Aswathy & Bhagirathan & Sudhikumar 2021
Creators: name: Golovatch, Sergei I.
name: Aswathy, Mathilakath Dasan
name: Bhagirathan, Usha
name: Sudhikumar, Ambalaparambil Vasu
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Polydesmida
Paradoxosomatidae
Polydrepanum

description: Revised diagnosis of Polydrepanum.
Gonofemorite elongate, slender and clearly twisted; solenophore mostly with a lateral lobe (lo) whose base on ventral side sometimes forming a protecting shield (lo) for the basal loop/curve of a long subflagelliform solenomere (sl). Distal half of solenophore elongate and unciform (Figs 9–12, 17–20).
Species included:
Polydrepanum tamilum Carl, 1932 (the type species),
Polydrepanum horridum Golovatch, 1984,
Polydrepanum granuliferum (Attems, 1936), comb. nov.,
Polydrepanum lamprum (Chamberlin, 1920), comb. nov.
Gyrodrepanum Carl, 1932, with the single species, G. lamprum (Chamberlin, 1920) (= Orthomorpha lampra Chamberlin, 1920, = Orthomorpha (Gyrodrepanum) bimontana Carl, 1932), described from Fiji and southern India (Carl 1932; Jeekel 1972; Bano & Murthy 1997), seems to represent yet one more true Polydrepanum, because it likewise shows an elongate, slender and clearly twisted gonofemorite, three distofemoral processes (a, b and c), a curved solenophore (sph) and, above all, a flagelliform free solenomere (sl) with a distinct basal loop and a protecting lobe (lo), however small, to shield the loop on the lateral side (Figs 46–50).
Hindomorpha Golovatch, 1984, erected for Sundanina granulifera Attems, 1936 (= H. granulifera (Attems, 1936)) as the type species (Golovatch 1984), is actually another Polydrepanum, because it also shows an elongate, slender and clearly twisted gonofemorite, two distofemoral processes (a and b), a curved solenophore (sph) and, above all, a flagelliform free solenomere (sl) with a distinct basal loop and a protecting lobe (lo), however inconspicuous, to shield the loop on the lateral side (Figs 44, 45).
In other words, both Hindomorpha Golovatch, 1984 and Gyrodrepanum Carl, 1932 are new junior subjective synonyms of Polydrepanum Carl, 1932, both syn. nov., and both P. granuliferum (Attems, 1936) and P. lamprum (Chamberlin, 1920) are new combinations, comb. nov. ex Hindomorpha and Gyrodrepanum, respectively.
The following key can be proposed for the separation of Polydrepanum species..
1(2) Meta- and paraterga very densely setose dorsally. Gonopods as in Figs 9–12.............................. P. horridum
2(1) A dense dorsal setation absent. Gonopods otherwise.......................................................... 3
3(4) Gonopodal femorite relatively stout, with a subquadrate protecting lobe (lo) above the basal loop (k) of a free solenomere (sl) (Figs 17–20)................................................................................. P. tamilum
4(3) Gonopodal femorite relatively long and slender, distofemoral outgrowths otherwise...............................… 5
5(6) Gonopod with two distofemoral spines (a and b), solenophore (sph) shorter (Figs 52, 53). India ............ P. granuliferum
6(5) Gonopod with three distinct distofemoral spines/processes (a, b and c), solenophore (sph) longer (Figs 47–51). Native to India whence introduced to Fiji ....................................................................... P. lamprum
description: Published as part of Golovatch, Sergei I., Aswathy, Mathilakath Dasan, Bhagirathan, Usha & Sudhikumar, Ambalaparambil Vasu, 2021, Review of the millipede tribe Polydrepanini, with the description of a new species from Kerala state, southern India (Diplopoda, Polydesmida, Paradoxosomatidae, Alogolykinae), pp. 485-516 in Zootaxa 5068 (4) on pages 496-499, DOI: 10.11646/zootaxa.5068.4.2, http://zenodo.org/record/5709510