Bifurcatella hoh, 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: 56-57

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Bifurcatella hoh

new species

Bifurcatella hoh   , new species

Figs. 210, 211 View FIGS , 214, 215 View FIGS

Types: Male holotype, female paratype from WASHINGTON: Jefferson Co., Alder Creek at Hoh River Road , elev. 125 m., 47.8301°N, - 124.2272°W, collected 14 December 2003, by W. Leonard, C. Richart GoogleMaps   .

Diagnosis: The unique feature of this species is the thin mesobasal process (mbp, Fig. 215 View FIGS ) of the posterior gonopod coxite, found in no others; further, the apical process of the coxite is sharply curved anteromesally. The mesal branch of the anterior gonopod is more than 2/3 the length of the lateral branch and is straight and blunt.

Etymology: Named for the Hoh River of Olympic National Park; a noun in apposition.

Description: Male holotype: Length, 11.0 mm. Ocelli 22 in triangular patch. Metazonites with moderately well-developed shoulders, segmental setae acute, curved. Color pale to medium tan, marked darker purplish brown, mostly on dorsum. Legpairs one and two reduced, three to seven enlarged, three to five with swollen femora, femora of pair seven slender; large femoral knobs on pairs five and six. Anterior gonopods ( Figs. 210 View FIGS , 214 View FIGS ) with lateral branches robust, apically expanded and decurved, terminus cap-like; mesal branches straight, cylindrical, blunt, two-thirds to three-quarters length of lateral branches. Posterior gonopod coxites ( Figs. 211 View FIGS , 215 View FIGS ) with evenly curved and tapered pseudoflagellar process, fimbriate branch small, subtending shallow, rimmed pit with pore, mesobasally arising thin process. Terminal processes both strongly recurved. Tenth coxae and eleventh prefemora as usual.

Female: Length, 11.5 mm, nonsexual characters as in male.

Distribution: WASHINGTON: Jefferson Co., Olympic National Park, near Hoh Rain Forest Visitor Center, elev. 180 m., 47.8597°N, - 123.9413°W, 14 December 2003, W. Leonard, C. Richart, mm; Clallam Co., Olympic National Park, Heart of the Hills Campground, elev. 545 m., 48.0355°N, - 123.4263°W, 18 November 2003, W. Leonard, m f.