Bayaria Shear & Marek, 2024

Shear, William A. & Marek, Paul E., 2024, The millipede family Striariidae Bollman, 1893. IX. The identity of Striaria californica Cook, 1899, and the new genus Bayaria for Striaria nana Loomis, 1936, with a key to genera and an annotated checklist of the Striariidae (Diplopoda, Chordeumatida, Striarioidea), Zootaxa 5463 (4), pp. 524-544 : 529-530

Bayaria Shear & Marek , new genus

Type species: Striaria nana Loomis, 1936 . The genus is at present monotypic.

Diagnosis. This genus is distinct from the co-occuring Amplaria in lacking distinct crests on the male collum ( Fig. 11 ), though in females small crests may be present in the posterior lateral quarter of the collum. In this respect, the genus is similar to Petra Shear et al., 2022 , but in the single species of that genus (which occurs far away in Idaho), the males have distinct crests on the posterior third of the collum and the anterior two thirds are ornamented with rounded tubercles. The gonopods of Petra sierwaldae Shear et al., 2022 are also quite different. The single included species of Bayaria is, at 5–7 mm in body length, only one-third the length of the sympatric Amplaria californica . The gonopods have a distinctive comb-like process not found in any known striariid species.

Etymology. The generic name is a Latin neologism (feminine) based on the occurrence of the species in the San Francisco Bay region, informally called the Bay Area, with spelling slightly altered to conform to other generic names in the Striariidae .

Description. As for the only included species, see below and Loomis (1936).

Figures

FIGURES 9–13. 9, 10. Amplaria californica (Cook, 1899), n. comb., male and female from Davenport, CA. 9. Male legpair 9, anterior view. 10. Female. 11–13. Bayaria nana (Loomis), n. comb., male from Bottcher’s Gap, CA. 11. Collum and first ring, dorsal view. 12. Head, ventrofrontal view. 13. Legpair 1, ventral view. Abbreviations: cp, coxal process; cx9, coxa 9; lab, labrum; m, mandible; t9, telopodite 9.