Taiyutyla tillamook, 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

Taiyutyla tillamook , new species

Figs. 12–18 , 23, 24

Types: Male holotype and male and female paratypes from Oregon, Tillamook Co., FS-14 2.2 mi NE of SR-22, Siuslaw National Forest, elev. 200 m, 45.2303°N, - 123.8422°W, collected 10 December 2005, by W. Leonard, C. Richart from litter and woody debris in a mixed forest including Alnus rubra , Polystichum munitum , Acer macrophyllum , Acer macrophyllum , Acer circinatum , and Pseudotsuga menziesii .

Diagnosis: This is the only species from Oregon or California with a strong, retrorse branch posterior on the coxites of the posterior gonopods; this type of coxite has otherwise been found only on species from Idaho. Further, the small narrow femoral knobs on legpairs five to seven are distinctive.

Etymology: The species name is a noun in apposition, referring to the occurrence of the species in Tillamook County, Oregon.

Description: Male paratype from Siuslaw National Forest. Length, 14.0 mm. 20 ocelli in triangular eyepatch. Metazonites with modest angular shoulders on rings 3–24. Color pale, cream-tan, mottled with darker purplish brown, mottling strongest midbody. Legpairs one and two reduced, three to seven enlarged, with mesal knobs on femora of legpairs five to seven ( Figs. 14–18 ), knobs smaller and thinner than in other species, femora of fourth legpair with low mesal swellings. Anterior gonopods ( Figs. 12 , 23 ) somewhat flattened anteroposteriorly, subapically with distinct shoulder bearing small teeth, terminal process acuminate, hooked. Posterior gonopod coxites ( Figs. 13 , 24 ) bearing large, complex fimbriate area just distal of midlength, terminating in small, twisted process; T-shaped branch (T) with long spine pointing ventrally. Legpair 10 coxae of normal size, with small glands, legpair 11 femora with long, thin, dorsally directed knobs.

Female 13.5 mm long, similar in nonsexual characters to male.

Distribution: Known only from the type locality.

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.