Brunsonia chelanomagna, 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 : 45

Brunsonia chelanomagna , new species

Figs. 180, 181

Types: Male holotype, five male and 11 female paratypes from WASHINGTON: Chelan Co., Lake Chelan , Wenatchee National Forest , Fields Point , elev. 360 m., 47.9699°N, - 120.2160°W, collected 26 October 2007, by W. Leonard, J. Baugh .

Diagnosis: Distinct from the syntopic B. chelanoparva in the distinctly pyramidal anterior gonopods, the posterior gonopod coxites lacking process a, and in having femoral knobs on legpairs 3 and 4, as opposed to 4 and 5.

Etymology: The species name is a combination of Lake Chelan, the type locality, and Latin magna, noting the fact that it is the larger of two species of Brunsonia syntopic there.

Description: Male holotype: Length, 15–15.5 mm. Nineteen ocelli in triangular patch. Metazonites with poorly developed shoulders on all trunk segments, segmental setae short, acute, curved. Color pale tan, with transverse bands of purplish brown on metazonites, pale spot surrounding outermost segmental setae, similar but lighter bands on prozonites. Legpairs three to seven encrassate as usual, femoral knobs present on legpairs three and four. Anterior gonopods ( Fig. 180 ) broad at base, quickly tapering to acute tip, tip posteriorly curved, dorsolateral pit large, deep, channel to tip of gonopod trending first lateral, then posterior, ending on short, subapical process. Posterior gonopod coxites ( Fig. 181 ) with finger-like projection at tip, strongly curved posteriolaterally, process a evidently lacking, channeled process large, prominent, with large pore basally, rugose or warty area small, restricted. Posterior gonopod prefemur clavate. Legpair 10 enlarged, with glands, legpair 11 prefemora with dorsally directed, curved processes.

Female 15.0–16.0 mm long, nonsexual characters similar to those of male.

Distribution: Known only from the type locality.

Notes: The anterior gonopods are closer in form to those of B. pulchra , but less complex at the tips. As noted above, this species is syntopic with B. chelanoparva at the type locality.

Figures

FIGS. 173–189. Brunsonia spp. Figs. 173–179. Brunsonia chelanomagna. Fig. 173. Right anterior gonopod, lateral view. Fig. 174. Left posterior gonopod coxite, posterior view. Figs. 175–179. Male legs 3–7, respectively. Figs. 180, 181. Brunsonia selwayana. Fig. 180. Right anterior gonopod, posteriolateral view. Fig. 181. Left posterior gonopod coxite, posterior view. Figs. 182–189. Brunsonia benewah. Fig. 182. Anterior gonopods, posterior view. Fig. 183. Tip of left anterior gonopod, posterior view. Fig. 184. Left posterior gonopod coxite, posterior view. Figs. 185–189. Male legs 3–7, respectively.