Amplaria mendocino, Shear, 2021

Shear, William A., 2021, The millipede family Striariidae Bollman, 1893. II. New records and species of the genus Amplaria Chamberlin, 1941 (Diplopoda, Chordeumatida, Striarioidea), Zootaxa 4908 (2), pp. 205-224 : 220-221

Amplaria mendocino , new species

Figs. 41 , 57

Types: Male holotype and male paratype from Usal Road , 1 mi N of US 1, 39.7910°, -123.8290°, 700’ asl, Mendocino Co., California, collected 20 September 1990 by D. Ubick. Parts of the holotype and paratype are mounted on SEM stub WAS34-16 .

Diagnosis: Very similar in gonopod anatomy to the foregoing species, A. cervus . Distinct in the ventral depressions on male coxae 4 and 5, which also bear fine, dense setae ( Fig. 41 ). Legpair 1 is not enlarged and lacks needlelike setae.

Etymology: The species name, a noun in apposition, recognizes the type locality in Mendocino Co., California.

Description: Male holotype. Length, about 11 mm, width 1.0 mm. Fourteen ommatidia in triangular patch. Labrum with long, slightly sinuous hooks at each angle. Mandibles not modified. Legpairs 1 and 2 similar in size; legpair 1 lacks long needle-like setae. Legpairs 2–7 telopodites of similar size, with flattened podomeres. Second trochanters with relatively small posteriorventral processes, bearing specialized setae. Legs 3 with coxal flasks of moderate length, divergent, with dense setae anterioapically, telopodites not reduced ( Fig. 41 ). Pleurotergal bars of ring 3 narrow, just touching in midline. Coxae of legpairs 4, 5, distally depressed, with fine, dense setae ( Fig. 41 ). Crests moderate. Pygidium short. Color pale tan, each metazonite with dark purplish dots on posterior ends of crests 3 and 4, metazonites shaded darker laterally.

Gonopods ( Fig. 57 ) almost identical to those of A. cervus , but anterior angiocoxites differing slightly in shape of distal end (compare Fig. 56 and Fig. 57 ). Ninth legpair with flattened coxae, very small, acute mesal coxal process.

Females not collected.

Distribution: Known only from the type locality.

Figures

FIGS. 41–44. Amplaria menocino, A. flucticulus. Fig. 41. Amplaria mendocino, legpairs 2–4 of male, ventral view. FIGS. 42–44. A. flucticulus. Fig. 42. Head, collum and rings 2–6, dorsolateral view. Fig. 43. Legpairs 2 and 3 of male, lateral view. Fig. 44. Right gonopod, lateral view.

FIGS. 55–59. Drawings of gonopods of Amplaria species. Fig. 55. Right gonopod of A. umatilla, mesal view. Fig. 56. Right gonopod of A. cervus, mesal view. Fig. 57. Right gonopod of A. mendocino, mesal view. Fig. 58. Right gonopod of A. flucticulus, lateral view. Fig. 59. Right gonopod of A. flucticulus, mesal view.