Bidentogon norcal Shear & Marek, 2021

Shear, William A. & Marek, Paul E., 2021, Three new genera and eighteen new species of miniature polydesmid millipedes from the northwestern United States (Diplopoda, Polydesmida, Polydesmidae), Zootaxa 4975 (1), pp. 81-126 : 91-92

Bidentogon norcal Shear & Marek , new species

Figs 17–20

Types. Male holotype and male and female paratypes from Ingot , Shasta Co. California, collected 3 February 1959 by K. W. Gerhardt. The dissected holotype is mounted on SEM stub WS33-10, deposited in CAS .

Diagnosis. The short solenomere of the gonopod (sm, Figs 18, 19 ) is poorly sclerotized and ornamented with fine, hair-like scales; the terminal zone (tz, Fig. 18 ) is long with an expanded tip, but flattened, not blunt as in B. expansus . There are 18 setae in the anterior marginal row of the collum.

Etymology. The species name refers to nor thern Cal ifornia.

Description. Male holotype. Length 5.5 mm, maximum width 0.62 mm. Nonsexual characters typical for the genus. Femora of third legpair expanded. Gonopod prefemora typically flattened. Solenomere (sm, Figs 18, 20 ) narrow, weakly sclerotized, straight, parallel to long axis of acropodite, set with closely spaced fine, hair-like cuticular scales. Terminal zone with flattened, slightly expanded tip (tz, Fig. 18 ; Fig. 19 ). Females similar in nonsexual characters to males.

Distribution. Known only from the type locality.

Figures

FIGURES 17–20. Bidentogon norcal, n. sp. 17. Midbody ring, dorsal view. 18. Rght gonopod, lateral view. 19. Left gonopod, mesal view. 20. Detail of left gonopod, mesal view. SEM stub WS33-10. Abbreviations: sm, solenomere; tz, terminal zone.