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| Nannaria spp. the wilsoni Species Group in the Millipede Genus Nannaria Chamberlin, 1918 Hennen, Means & Marek, 2022 |
Abstract
Although many new species of the millipede genus Nannaria Chamberlin, 1918 have been known from museum collections for over half a century, a systematic revision has not been undertaken until recently. There are two species groups in the genus: the minor species group and the wilsoni species group. In this study, the wilsoni species group was investigated. Specimens were collected from throughout its distribution in the Appalachian Mountains of the eastern United States and used for a multi-gene molecular phylogeny. The phylogenetic tree recovered Nannaria and the two species groups as monophyletic, with Oenomaea pulchella as its sister group. Seventeen new species were described, bringing the composition of the wilsoni species group to 24 species, more than tripling its known diversity, and increasing the total number of described Nannaria species to 78. The genus now has the greatest number of species in the family Xystodesmidae. Museum holdings of Nannaria were catalogued, and a total of 1,835 records used to produce a distribution map of the species group. Live photographs, illustrations of diagnostic characters, ecological notes, and conservation statuses are given. The wilsoni species group is restricted to the Appalachian region, unlike the widely-distributed minor species group (known throughout eastern North America), and has a distinct gap in its distribution in northeastern Tennessee and adjacent northwestern North Carolina. The wilsoni species group seems to be adapted to mesic microhabitats in middle to high elevation forests in eastern North America. New species are expected to be discovered in the southern Appalachian Mountains.
Keywords: Appalachia, Diplopoda, Nannariini, phylogeography, taxonomy
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| Nannaria wilsoni species group left male acropodites: (left) anterior view and (right) magnified posterior view. At right, N. austricola gonopod diagram, anterior view, color-coded by region: coxa (dark grey), prefemur (light grey), and acropodite (white). A dashed line indicates the beginning of the distal zone region of the acropodite. Abbreviations: ap, acropodite; bz, basal zone; cx, coxa; mf, acropodite medial flange; pp, prefemoral process; sc, seminal canal; tf, acropodite tip medial flange; tw, anterior bend twist. |
Taxa included in the wilsoni species group
Nannaria aenigma Means, Hennen, & Marek, 2021
Nannaria austricola Hoffman, 1950
Nannaria ericacea Hoffman, 1949
Nannaria morrisoni Hoffman, 1948
Nannaria scutellaria Causey, 1942
Nannaria shenandoa Hoffman, 1949
Nannaria wilsoni Hoffman, 1949
Nannaria acroteria sp. nov.
Nannaria amicalola sp. nov.
Nannaria antarctica sp. nov.
Nannaria cymontana sp. nov.
Nannaria filicata sp. nov.
Nannaria liriodendra sp. nov.
Nannaria lithographa sp. nov.
Nannaria lutra sp. nov.
Nannaria marianae sp. nov.
Nannaria nessa sp. nov.
Nannaria orycta sp. nov.
Nannaria paraptoma sp. nov.
Nannaria rhododendra sp. nov.
Nannaria spalax sp. nov.
Nannaria spiralis sp. nov.
Nannaria swiftae sp. nov.
Nannaria vellicata sp. nov.
Derek A. Hennen, Jackson C. Means and Paul E. Marek. 2022. A Revision of the wilsoni Species Group in the Millipede Genus Nannaria Chamberlin, 1918 (Diplopoda, Polydesmida, Xystodesmidae). ZooKeys. 1096: 17-118. DOI: 10.3897/zookeys.1096.73485
