Plaramia Shear & Marek 2022, new genus
Creators: name: Shear, William A.
name: Marek, Paul E.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Chordeumatida
Striariidae
Plaramia

description: Plaramia Shear & Marek, new genus
Type species: Plaramia arcata Shear & Marek, n. sp.
Etymology: The genus name is an arbitrary combination of letters, an anagram of the related genus name Amplaria forming a Latin neologism to be treated as feminine in gender.
Diagnosis: The flagellocoxites are long, thin and largely concealed in this genus and the ninth leg telopodites are free. Thus we place the genus in Striariinae. Three of the striariine genera described in this paper have their metazonital crests all roughly subequal and not paranota-like. The two species of Plaramia, n. gen., differ from those of Maraplia, n. gen., in that the gonopod anterior angiocoxites are erect and sinuously curved, rather than reflexed anteriorly and either short or if long, curved in an arc. In Ralampia, n. gen., the gonopods are quite compact, and the colpocoxites have long, erect, branched, stiff fimbriae distally.
Description: Small striariines, about 3–4 mm long (Fig. 46). Thirty postcephalic rings, including telson. Two ommatidia on each side of head (Fig. 45, om). Head (Fig. 37) densely setose, with small tubercles. Labral hook lacking. Mandibular stipes with serrate margin, acute triangular process. Collum with crests limited to posterior region, studded with small tubercles. Metazonital crests 1–5 subequal (Fig. 41), crest 6 slightly elevated as paranota (though variably so; Fig. 46); metazonital setae long, with brush-like tips. Telson with lobes very shallowly demarcated or nearly indiscernable, sulci shallow. Legpair 1 (Fig. 37, L 1) larger than legpairs 2 or 3, femora and tibiae with long, needle-like setae, tarsus with comb. Legpair 2 with short telopodites, vas deferens openings in coxae facing mesally, coxae notched so that when appressed, a single pore is formed. Legpair 3 with relatively short flasks (Figs 38, 48, cf), reaching fifth coxae when extended posteriorly, heavily set with raised cuticular scales, few contorted setae. Legpairs 4–7 crassate, legpair 7 lacking coxal lobes.
Gonopod sternum large, broader than long (Fig 43, s). Coxa with 4–6 setae, coxal process absent. Anterior angiocoxites long, not deflexed, sinuously curved or with hooked termination (Figs 42, 43, 72, 73). Posterior angiocoxites small, inconsipicuous, forming short sheath for flagellocoxites. Flagellocoxites single, long, thin, concealed by angiocoxites. Colpocoxites large, sac-like, seemingly well sclerotized, with fine longitudinal ridges but lacking fimbriae. Ninth legs (Figs 44, 78) with coxosternite and free telopodites. Coxosternite with two processes from coxal part, sternal part sometimes expanded, with central knob. Telopodite large, variable, with pebbled sculpture and setae, with deep notch to accommodate gonopods. Telopodite locks into deep notch in ventrolateral margin of pleurotergite 7.
Tenth legs with coxal pores, coxae slightly enlarged.
Distribution: Humboldt Co., California.
description: Published as part of Shear, William A. & Marek, Paul E., 2022, The millipede family Striariidae Bollman, 1893. VI. Six new genera and thirteen new species from western North America (Diplopoda, Chordeumatida, Striarioidea), pp. 501-531 in Zootaxa 5205 (6) on pages 519-520, DOI: 10.11646/zootaxa.5205.6.1, http://zenodo.org/record/7318605