@article {1151, title = {Taxonomic synthesis of the eastern North American millipede genus Pseudopolydesmus (Diplopoda: Polydesmida: Polydesmidae), utilizing high-detail ultraviolet fluorescence imaging}, journal = {Zoological Journal of the Linnean Society}, volume = {187}, year = {2019}, month = {18/04/2019}, pages = {117-142}, abstract = {

The species of the eastern North American millipede genus Pseudopolydesmus are reviewed. Synonyms and comprehensive literature citations are provided for each of the eight recognized species. Diagnostic morphology of the genus, including clarification of male gonopod terminology, is reviewed and defined using scanning electron microscopy and high-quality macrophotographic images, including those in which ultraviolet fluorescence was induced to produce detailed images of morphological structures. Based on the examination of available type material, the following eight species are recognized: (1) Pseudopolydesmus erasus; (2) Pseudopolydesmus canadensis; (3) Pseudopolydesmus collinus; (4) Pseudopolydesmus pinetorum; (5) Pseudopolydesmus minor; (6) Pseudopolydesmus caddo; (7) Pseudopolydesmus paludicolus; and (8) Pseudopolydesmus serratus. The species names Polydesmus neoterus and Polydesmus euthetus are here placed as junior subjective synonyms of Ps. minor (both syn. nov.), and Polydesmus natchitoches is placed as a junior subjective synonym of Ps. pinetorum (syn. nov.).

}, keywords = {anatomy, biodiversity, ecology, genitalia, genus revision, morphological systematics, Taxonomy}, issn = {0024-4082}, doi = {10.1093/zoolinnean/zlz020}, url = {https://academic.oup.com/zoolinnean/article/187/1/117/5475011}, author = {Sierwald, Petra and Hennen, Derek A. and Zahnle, Xavier J. and Ware, Stephanie and Marek, Paul E.} } @article {176, title = {Genital morphology and the mechanics of copulation in the millipede genus Pseudopolydesmus (Diplopoda: Polydesmida: Polydesmidae)}, journal = {Arthropod Structure \& Development}, volume = {54}, year = {2020}, month = {28/01/2020}, pages = {100913}, abstract = {

Mate choice, copulation, genital morphology, and sperm storage are not very well understood in millipedes. The use of three-dimensional x-ray computed tomography (\μCT) provides new morphological data regarding millipede reproductive systems in both the female and male, including chitinous sclerites and membranes, muscles, glands, oviducts, and sperm conduits. Here we present a complete integrated account of the morphology and function of the female genital organs in the family Polydesmidae (Diplopoda: Polydesmida) using \μCT, UV fluorescence imaging, and scanning electron microscopy. These data allow us to consider competing hypotheses regarding millipede vulva formation. We additionally present the morphology of copulatory interface in Pseudopolydesmus Attems, 1898 using images of a mating pair in copula and by simulating the interface of the organs using 3D models from \μCT, allowing us to tentatively identify a lock-and-key-like mechanism. Finally, we use \μCT to reveal the topology of the seminal canal in the gonopod of male Pseudopolydesmus, a topic that has remained unresolved for nearly 80 years.

}, keywords = {Diplopoda, Female genitalia, Reproductive anatomy, Sexual selection, Ultraviolet fluorescence, X-ray tomography}, issn = {1467-8039}, doi = {10.1016/j.asd.2020.100913}, url = {https://linkinghub.elsevier.com/retrieve/pii/S1467803919301203}, author = {Zahnle, Xavier J. and Sierwald, Petra and Ware, Stephanie and Bond, Jason E.} }