Striaria orator, Shear, 2021

Shear, William A., 2021, The millipede family Striariidae Bollman, 1893: III. Four new species of Striaria Bollman, 1888 (Diplopoda, Chordeumatida, Striariidae) from Idaho, USA, Zootaxa 4920 (3), pp. 395-406 : 403

Striaria orator , n. sp.

Figs 19–21 , 33–36

Types: Male holotype and female paratype from Banks Gulch, 4 mi north, 8 mi east of Harvard, 46.9818°, - 116.5607°, 2905’ (890 m) asl, Latah Co., Idaho, collected 10 September 1978 by A. K. Johnson, deposited in the California Academy of Sciences. Parts of the holotype are mounted on SEM stub WS34-6, deposited with the specimens .

Etymology: The species epithet, a noun in apposition, honors Orator F. Cook (1867–1949), a botanist specializing in cotton, rubber trees and palms who also laid a sound foundation for the study of North American millipedes, establishing many families and genera still valid today.

Diagnosis: Distinct from the foregoing species from Idaho in lacking any spinules or teeth on the apex of the anterior angiocoxite of the gonopod.

Description: Male holotype. Length, about 10 mm, width about 1.0 mm. Body form and secondary sexual modifications typical of genus, as described above for S. aculeata . Third legpair coxae with long flasks (cf, Fig. 19 ), postcoxal bars of pleurotergite 3 overlapping, broad (pcb, Fig. 19 ). legpair 3 telopodites robust, prefemora thickly swollen (pf3, Fig. 19 ).

Gonopod ( Figs 20, 21 , 33–36 ) anterior angiocoxites hardly bent at all at “kink” but with very prominent transverse ridge, at least five distinct rugae, lateral subterminal spine shorter than in S. vagabundus , mesal tip of anterior angiocoxite not projecting but laterally hammer-shaped. Posterior angiocoxites with two blunt terminal processes, three or four narrower processes, short posterior hook, sheathing four flagellocoxites.

Female paratype: Similar to male but without secondary sexual modifications.

Distribution: Known only from the type locality.

Figures

FIGURES 16–19. New species of Striaria. 16, 17. S. bombillus, n. sp. 16. Pygidium of male, dorsal view. 17. Pygidium of female, dorsal view. 18. Right ninth leg of S. vagabundus, n. sp., anterior view. 19. Second and third legpairs of S. orator, n. sp., ventroposterior view. Abbreviations: cf, coxal flask; cx, coxa; cxp, coxal process; numerals, pleurotergite numbers; pcb, postcoxal bar; pf3, prefemur of leg 3, ptr7, modified margin of pleurotergite 7; pyg, pygidium; s, sternum; t9, telopodite of leg 9.

FIGURES 20, 21. Striaria orator, n. sp. 20. Left gonopod complex, lateral view. 21. Gonopod tips of right side, mesal view. Abbreviations: aac, anterior angiocoxite; cx, coxa; cxp, coxal process; lcc, lateral lobe of colpocoxite; pac, posterior angiocoxite; ptr7, modified margin of pleurotergite 7; t9, telopodite of leg 9.

FIGURES 31–36. Gonopods of new species of Striaria. 31, 32. S. vagabundus, n. sp. 31. Right gonopod, mesal view. 32. Right gonopod, lateral view. 33–36. S. orator, n. sp. 33. Right gonopod, mesal view. 34. Right gonopod, lateral view. 35. Tip of anterior angiocoxite, mesal view. 36. Same, lateral view. Abbreviations: aac, anterior angiocoxite; lcc, lateral lobe of colpocoxite; pac, posterior angiocoxite; pcc, posterior lobe of colpocoxite.