New giant pill-millipede species from the littoral forest of Madagascar (Diplopoda, Sphaerotheriida, Zoosphaerium)

Zootaxa - Tập 1097 Số 1
Thomas Wesener‍1, Petra Sierwald2
1Lower Invertebrates, Museum Alexander Koenig ZFMK, Adenaueralle 160, 53113 Bonn, Germany
2Zoology, Insects, Field Museum of Natural History, 1400 S Lake Shore Drive, Chicago, IL 60605

Tóm tắt

Two new species of the Malagasy sphaerotheriid genus Zoosphaerium, Z. villosum sp. nov., and Z. arborealis sp. nov., are described. Characters of a shiny black new putative species of the genus Zoosphaerium are described and illustrated. Zoosphaerium alluaudi DeSaussure & Zehntner is redescribed. The characters defining the genus Zoosphaerium are summarized: three jointed anterior telopods, first joint with a stridulation organ termed ‘harp’ composed out of 1–2 stridulation ribs. Females with stridulation ribs on the subanal plate, termed ‘washboard’. Operculum of female vulva constricted in the middle (‘subreniform’). 6 th joint of antennae of cylindrical shape. The nomenclatural history of the genus name is discussed. The intraspecific variability of many characters commonly used to delineate species within the genus Zoosphaerium and other members of the order Sphaerotheriida is analyzed in detail. Ontogenetic changes in the female vulva and the male telopods are discussed and illustrated.Zwei neue Arten der Madagassischen Gattung Zoosphaerium, Z. villosum sp. nov. und Z. arborealis sp. nov., werden beschrieben. Merkmale einer wahrscheinlich neuen, aber hier nicht benannten Art der Gattung werden beschrieben und illustriert. Die Art Zoosphaerium alluaudi DeSaussure & Zehntner, 1902 wird wiederbeschrieben. Die nomenklatorische Geschichte und die Merkmale der Gattung Zoosphaerium werden zusammengefasst. Mitglieder der Gattung zeichnen sich durch folgende Merkmale aus: Dreigliedrige anteriore Telopoden mit einem Stridulationsorgan auf dem ersten Glied, welches aus 1–2 Stridulationsrippen besteht und als Harfe bezeichnet wird. Weibchen mit mehreren Stridulationsrippen auf der Subanalplatte, „washboard“ genannt. Operculum der weiblichen Vulva am Oberrand in der Mitte eingebuchtet (subreniform). 6. Antennenglied zylindrisch geformt. Die intraspezifische Variabilität mehrerer in der Gattung Zoosphaerium häufig benutzter Artmerkmale wurde untersucht. Formenwandel der weiblichen Vulven und männlicher Telopoden während der Ontogenie werden beschrieben und abgebildet.

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