Amplaria baughi, 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 : 217-218

Amplaria baughi , new species

Figs. 27–30 , 53

Types: Male holotype and female paratype from O’Hara Campground, Selway River Road , 7 mi E of State Road 12, 46.0852°, -115.5174, 600’ asl, Nez Perce-Clearwater National Forest , Idaho Co., Idaho, collected 16 April 2004 by W. Leonard; additional male and female paratypes collected at the same place 14 October 2006 by W. Leonard, C. Richart & A. Fusek, and 13 September 2010 by W. Leonard. Parts of these specimens are mounted on SEM stub WAS34-15 .

Diagnosis: The only Amplaria species known at this time from Idaho. Distinct from other species in the form of the anterior angiocoxites of the gonopods ( Fig. 28 , 53 ), the relatively unmodified prefemur of male leg 3 and the long, sinuate process on the coxa of male ninth leg.

Etymology: This species is named for Jim Baugh, of Ellensburg, Washington, at the request of Bill Leonard and in recognition of his work collecting millipedes and other invertebrates in the states of Idaho and Washington.

Description: Male holotype. Length, about 10 mm, width about 1.0 mm. Five black ommatidia arranged in two rows. Labrum with sinuate hooks at each angle. Mandibles not modified. Legpairs 1 and 2 of similar size; pair 1 without needle-like setae, tarsus with flattened, twisted setae. Trochanters of legpair 2 nearly unmodified, small ventral process bears single specialized seta. Coxal flasks ( Fig. 29 ) relatively short, curved anteriorly, telopodites of legpair 3 reduced, prefemora not strongly modified. Pleurotergal bars of ring 3 crossing in midline. Crests low on collum ( Fig. 27 ), higher on anterior rings, then reduced again on posterior segments. Pygidium short. Color medium brown, with “two-striped” pattern in dark purplish brown, lateral spots of metazonites purplish brown.

Gonopods ( Figs. 28 , 53 ) with anterior angiocoxites erect, straight, lateral edge with irregular teeth apically; posterior angiocoxites broad, sheathing 3 or 4 rather short flagellocoxites. Ninth legpair coxae with strong, sinuate distal process ( Fig. 30 ); flattened telopodite loosely articulates with depression on pleural margin of metazonite of ring 7.

Females similar to males in nonsexual characters.

Distribution: Known only from the type locality.

Figures

FIGS. 25–28. Amplaria arcata, A. baughi. Figs. 25, 26. Amplaria arcata. Fig. 25. Right gonopod. posterior view. Fig. 26. Gonopods, posterior view. Figs. 27. 28. A. baughi. Fig. 27. Collum and second ring, dorsal view. Fig. 28. Gonopods, posterior view.

FIGS. 29–31. Amplaria baughi, A. staceyi. Figs. 29, 30. Amplaria baughi. Fig. 29. Left leg 3 of male, anterior view. Fig. 30. Right leg 9 of male, anterior view. Fig. 31. A. staceyi, lepair 3 of male, posterioventral view.

FIGS. 45–54. Drawings of gonopods of Amplaria species. Fig. 45. Left gonopod of A. nazinta, lateral view. Fig. 46. Tip of anterior angiocoxite of A. nazinta gonopod, lateral view. Fig. 47. Right gonopod of A. crawfordi, mesal view. Fig. 48. Tip of anterior angiocoxite of A. crawfordi, lateral view. Fig. 49. Right gonopod of A. fontinalis, mesal view. FIG. 50. Tip of anterior angiocoxite of A. fontalis, posteriolateral view. Fig. 51. Right gonopod of A. rykkenae, mesal view. Fig. 52. Right gonopod of A. rykkenae, lateral view. Fig. 53. Right gonopod of A. baughi, lateral view. Fig. 54. Right gonopod of A. umatilla, lateral view.