Chordeumatida Striariidea, Striarioidea
Creators: name: Shear, William A.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Chordeumatida

description: Key to families of Chordeumatida in the Pacific Coastal States of the USA
1a. Head partially covered by collum........................................................................ 2
1b. Head not covered by collum............................................................................ 5
2a. Metazonites with strong longitudinal crests extending their full length; pygidium 3-lobed; southern California to British Columbia (also in Idaho and northern Virginia to northern Alabama)....................................... Striariidae
2b. Metazonites without long crests; pygidium not 3-lobed....................................................... 3
3a. Metazonites ornamented with scattered, closely set, short ridges; male ninth legs with 2 telopodite podomeres; northern California to Alaska (also in Idaho, Arizona, Utah, Illinois and Missouri).................................... Tingupidae
3b. Metazonite ornamentation granular, male ninth legs with a single telopodite podomere, or lacking telopodites........... 4
4a. Male ninth legs with a single, enlarged telopodite podomere; San Francisco Bay area to Alaska .......... Rhiscosomididae
4b. Male ninth legs much reduced, lacking telopodites, concealed by gonopods; southern California ............. Apterouridae
5a. Mature males with 26 postcephalic segments; northwestern Washington ........................ Anthroleucosomatidae
5b. Mature males with 28 or 30 postcephalic segments.......................................................... 6
6a. Mature males with 28 postcephalic segments; with ninth legs lacking telopodites, distinctly U-shaped, male tenth legs with enlarged coxosternum; western Washington .................................................... Microlympiidae
6b. Mature males with 28 or 30 (usually 30) postcephalic segments; ninth legs with prominent telopodites of one or two podomeres, tenth legs with coxae and sternum distinct................................................................. 7
7a. Metazonites with neither prominent projecting shoulders nor paranota, metazonital setae short; ninth leg telopodites of mature males with single enlarged podomeres; central California to Alaska ..................................... Caseyidae
7b. Metazonites with prominent projecting shoulders or paranota.................................................. 8
8a. Metazonites sparsely granular, with strong, flattened, rimmed paranota; metazonital setae short; pygidium with 3 lobes; ninth leg telopodites of males with single, swollen, button-like podomere; northwestern Washington ........ Urochordeumatidae
8b. Metazonites smooth, with prominently projecting shoulders sometimes paranota-like but never rimmed; metazonital setae long, curved; pygidium not lobed; ninth leg telopodites of males with two podomeres, the distal one cylindrical and turned dorsally; central California to Alaska (also Rocky Mountains from Alberta to Arizona, Mississippi Valley and Appalachian Mountains from New York to North Carolina).............................................................. Conotylidae
description: Published as part of Shear, William A., 2021, Additions to the millipede family Caseyidae. II. Martenseya, a new genus of miniature, blind millipedes from California (Diplopoda, Chordeumatida Striariidea, Striarioidea, Caseyidae), pp. 108-113 in Zootaxa 4984 (1) on page 109, DOI: 10.11646/zootaxa.4984.1.10, http://zenodo.org/record/4926688