Brunsonia selwayana, 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 : 45-47

Brunsonia selwayana , new species

Figs. 173–179 , 190, 191

Types: Male holotype and female paratype from IDAHO: Idaho Co., O’Hara Campground, Selway River Road 6.7 mi SE of US-12, Nez Perce-Clearwater National Forests , elev. 475 m., 46.0845°N, - 115.5154°W, collected 12 April 2003, by W. Leonard, from the forest litter of a mixed forest including Thuja plicata , Pseudotsuga menziesii , Alnus cf. rubra , Populus trichocarpa , Rubus parviflorus , and moss, ( CAS) . Male paratype, same as previous, collected 14 October 2006, by W. Leonard, C. Richart, A. Fusek (CAS) .

Diagnosis: The posterior gonopod colpocoxites are unique and appear somewhat reduced compared to other Brunsonia . Both this species and the following are distinct from the others in having a prominent, oblong femoral process on male legpair five, while pairs three, six and seven lack femoral processes. The anterior gonopods of B. benewah , n. sp. have a posterior process that is lacking in the present species.

Etymology: The O’Hara Campground is located on the Selway River, hence the adjectival species epithet.

Description: Male holotype: Length, 10.0 mm. Twenty ocelli in triangular eyepatch. Metazonites with low shoulders on all trunk rings from three to 25. Color light brown, lightly marked darker purplish brown, markings more distinct anteriorly. Legpairs one and two reduced, three to seven enlarged, mesal knobs present only on femora four and five, mesal on both ( Figs. 175–179 ). Anterior gonopods ( Fig. 173 , 190 ) simple, curved, with median basal process well-developed. Posterior gonopod coxites ( Figs. 181 , 191 ) complex, with short, lateral retrorse process, mesal fimbriate region very much reduced; subterminal process, curved, thin, acute, terminal process with two lamellate divisions reflexed. Legpair 10 coxae of normal size, with small glands, legpair 11 femora with long, thin, dorsally directed knobs.

Female 10 mm long, similar to male in nonsexual characters.

Distribution: This species has been collected only at the type locality.

Notes: Lack of material prevented SEM examination. The posterior gonopod coxites are unique among Brunsonia species and it is difficult to homologize the processes with the standard pattern, as set by B. albertana . However, the process labeled a in Fig. 181 may actually be that process. The channeled process seems obsolete, but there is a small pore subapically (not shown in the drawings but observed later).

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.

FIGS. 190–193. Brunsonia chelanomagna and Complicatella complicata. Figs. 190, 191. Brunsonia chelanomagna. Fig. 190. Anterior gonopods, posterior view. Fig. 191. Left posterior gonopod coxite, posterior view. Figs. 192–193. Complicatella complicata. Fig. 192. Left anterior gonopod, posterior view. Fig. 193. Posterior gonopod coxites, posterior view.