Taiyutyla acuphora, Shear & Richart & Wong, 2020

Shear, William A., Richart, Casey H. & Wong, Victoria L., 2020, The millipede family Conotylidae in northwestern North America, with a complete bibliography of the family (Diplopoda, Chordeumatida, Heterochordeumatidea, Conotyloidea), Zootaxa 4753 (1), pp. 1-78 : 12-13

Taiyutyla acuphora , new species

Figs. 19–21 , 25 , 26

Types: Male holotype and female paratype from Washington, Lewis Co., Stillman Basin, Weyerhaeuser 4000 Road 1.8 mi SW of Pe-Ell McDonald Road, elev. 282 m., 46.5145°N, - 123.2015°W, collected 4 December 2004, by W. Leonard, C. Richart from the litter and woody debris of a mixed forest including Thuja plicata , Alnus rubra , Rubus spectabilus , Pseudotsuga menziesii , and Polystichum munitum .

Diagnosis: The anterior gonopods have a unique, anterior wing-like extension, while the posterior gonopod coxites appear squared off, but have a distal, acute terminal process and femoral knobs are borne on male legpairs 47. No other species of Taiyutyla has this combination of characters.

Etymology: The species epithet means “needle bearer” and refers to the acute terminal process of the posterior gonopod coxite.

Description:Male holotype.Length, 12.5 mm.Twenty to twenty-two ocelli in triangular eyepatch.Metazonites with well-developed shoulders, segmental setae long,acute,curved.Color light brown,irregularly marked brownish purple. Legpairs one and two reduced, three to seven moderately enlarged, podomeres not swollen, femoral knobs on pairs 4–7. Anterior gonopods ( Figs. 19, 20 , 25 ) distinctly clavate, distally expanded anterior into broad wing, bearing small, distal posterior process. Posterior gonopod coxites ( Figs. 21 , 26 ) short, stout, apically squared off, but with long, curved, acute process arising from lateral angle apically; ventral arm of T-shaped branch (T, Fig. 26 ) with fine fimbriae, embraced by fimbriate region, distinct pore near base of this region (with coagulated secretion in some specimens). Tenth coxae of normal size, with glands; eleventh prefemora with long, curved distal processes.

Female 13.5 mm long. Nonsexual characters as in male.

Distribution: WASHINGTON: Grays Harbor Co., Middle Satsop Road 2 mi N of Brady near Satsop River, elev. 15 m., 47.0245°N, - 123.5196°W, 3 January 2003, W. Leonard et al., under maple leaves, mm ff.

Notes: This is the first Taiyutyla species to be recorded from western Washington.

Figures

FIGS. 5–21. Taiyutyla spp. Figs. 5–11. Taiyutyla jonesi. Fig. 5. Anterior gonopods, posterior view. Fig. 6. Right posterior gonopod coxite, posterior view. Figs. 7–11. Male legs 3–7, respectively. Figs. 12–18. Taiyutyla Tillamook. Fig. 12. Anterior gonopods, posterior view. Fig. 13. Right posterior gonopod coxite, posterior view. Figs. 14–18. Male legs 3–7, respectively. FIGS. 19–21. Taiyutyla acuphora. Fig. 19. Left anterior gonopod, posterior view. Fig. 20. Left anterior gonopod tip, mesal view. Fig. 21. Right posterior gonopod coxite, posterior view.

FIGS. 22–25. Taiyutyla spp. Fig. 22. Taiyutyla napa, right gonopod complex, posterior view. Figs. 23, 24. Taiyutyla tillamook. Fig. 23.Anterior gonopods, posterior view. Fig. 24. Right posterior gonopod coxite, posterior view. Fig. 25. Taiyutyla acuphora, right anterior gonopod, lateral view.

FIGS. 26–29. Taiyutyla spp. Fig. 26. Taiyutyla acuphora, right posterior gonopod coxite, posterior view. Figs. 27–29. Taiyutyla amicitia. Fig. 27. Tip of right anterior gonopod, lateral view. Fig. 28. Left anterior gonopod, mesal view. Fig. 29. Right posterior gonopod coxite, posterior view.