Lamparia bentonensis Shear & Marek 2022, n. sp.

Lamparia bentonensis Shear & Marek, n. sp.

Figs 20–25, 63–65

Types: Male holotype and male and female paratypes from Clemens Park, Seely Creek Road, 0.3 mi from SR34, north fork of Alsea River, Benton Co., Oregon, 400’ asl, 44.4092°N, - 123.5678°W, collected 4 December 2005 by W. Leonard and C. Richart. Male and female paratypes from localities along Wells Creek Road, Benton Co., Oregon as follows: at SR34, 44.4707°N, - 123.4797°W, collected 29 November 2004 by W. Leonard; 0.6 mi W of SR34, 44.4722°N, - 123.4794°W, collected 25 February 2005 by W. Leonard, C. Richart; 0.7 mi from SR34, 6.3 mi from SR20, 44.4686°N, - 123.4941°W, 1100’ asl, collected 9 December 2005 by W. Leonard, C. Richart.

Etymology: The species epithet refers to Benton County, Oregon, which includes all known collection localities for this species.

Diagnosis: Very similar to L. curryensis, n. sp., but distinct in details of the gonopods (compare Figs 63, 64 with Figs 61, 62) and in the shorter coxosternal processes of the ninth legs (Fig. 64, cp). The sixth crests of this species (Fig. 21) are only about half the height of those of L. curryensis n. sp..

Description: Male paratype from Clemens Park. Length, 5.1 mm, width 0.6 mm. Two ommatidia on each side of head. Sixth crests well extended as small paranota (Figs 20, 21). Telson lobes nearly completely suppressed (Fig 22, tel). Color white, suffused light purplish brown. Second coxae with common opening for vas deferens (Fig. 23). Flasks of third coxae long, when extended posteriorly reaching to anterior margin of seventh coxae (Fig. 25, cf). Other characters as described for genus.

Gonopods (Figs 24, 63, 64) moderately large. Coxae with 5–6 setae, elongate.Anterior angiocoxites (Figs 24, 63, 63, aac) narrow, erect, with flattened, bulbous tip, posterior surface finely fimbriate from base to just below bulbous tip. Posterior angiocoxite complex (Figs 63, 64, pac) with three branches, one of which sheaths flagellocoxite. Flagellocoxite (possibly 2 of these) narrow, slightly curved, comparatively short (Fig. 63, fc). Colpocoxite (Fig. 64, cc) small, densely set with triangular, fine cuticular teeth. Ninth legs (Fig. 65) with coxosternum. Coxosternal processes (Figs 24, 65, cp) flattened, drawn out laterally to points.Telopodites (Figs 24, 65, t 9) free, apically flattened, mesally curved anteriorly, with sawtooth edges, interlocking with gonopods, laterally fitting into deep indentations in ventrolateral edges of seventh ring (Fig. 24). Tenth coxae not much swollen, gland openings anteriodorsal.

Female paratypes similar to males in nonsexual characters.

Distribution: Presently limited to Benton Co., Oregon.

Note: Initially we thought this species and the preceding were the same, but careful examination of the gonopods at 400X under the compound microscope and a study of SEM photographs of the ninth legs showed that they are clearly distinct.