Striaria vagabundus, 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 : 402-403

Striaria vagabundus , n. sp.

Figs 18 , 29–32

Types: Male holotype and paratype and two female paratypes from Hobo Cedar Grove Botanical Area, St. Joe National Forest , 47.0879°, -116.1128°, 4400’ (1340 m) asl, Shoshone Co., Idaho, collected 8 June 2004 by W. Leonard, deposited in the California Academy of Sciences. Parts of the holotype are mounted on SEM stub WS34-7, deposited with the specimens .

Etymology: The species epithet, vagabundus , is a Latin noun in apposition, meaning “a wanderer” and refers to the type locality, Hobo Cedar Grove.

Diagnosis: Distinct from other Idaho species of Striaria in having no spinules tipping the anterior angiocoxites of the gonopods, but instead three low, triangular teeth presumably homologous to the spinules.

Description: Male holotype. Length, about 9.0 mm, width about 0.85 mm. Body form and secondary sexual modifications typical of genus, as described above for S. aculeata .

Gonopod anterior angiocoxites ( Figs 29–32 ) only slightly bent at “kink,” with about five distinct rugae proximal to the transverse ridge, long lateral subterminal spine, mesal tip projecting posteriorly. Posterior angiocoxites robust, with three terminal process, subterminal posterior hook, sheathing three or four flagellocoxites. Ninth legs typical, telopodite broadly flattened, coxa with small mesal process, loosely articulating with modified margin of seventh pleurotergite ( Fig. 18 )

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

Distribution: Known only from the type locality. Hobo Cedar Grove is an area of primary forest, with huge western red cedar trees ( Thuja plicata ) estimated to be as much as 500 years old. Many rare plants are known from this 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 22–30. Gonopods of new species of Striaria. 22–24. S. aculeata., n. sp. 22. Right gonopod, mesal view. 23. Tip of anterior angiocoxite, lateral view. 24. Same, mesal view. 25–28. S. bombillus, n. sp. 25. Right gonopod, mesal view. 26. Right gonopod, lateral view. 27. Tip of anterior angiocoxite, lateral view. 28. Same, mesal view. 29, 30. S. vagabundus, n. sp. 29. Tip of anterior angiocoxite, lateral view. 30. Same, mesal view. Abbreviations: aac, anterior angiocoxite; lcc, lateral lobe of colpocoxite; pac, posterior angiocoxite; pcc, posterior lobe of colpocoxite.

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.