Oedichirus procerus, Herman, 2013

Herman, Lee H., 2013, Revision Of The New World Species Of Oedichirus (Coleoptera: Staphylinidae: Paederinae: Pinophilini: Procirrina), Bulletin of the American Museum of Natural History 2013 (375), pp. 1-137 : 112-114

Oedichirus procerus , new species

Figures 40 , 197–198

TYPE MATERIAL: Holotype: Female. ‘‘ F95314 W2 BRAZIL Bahia Urucuca, Cerro Grande 01.28.1995 D.Agosti primary Atlantic forest 120m 14 ° 259170S, 39 ° 39430W/ Holotype Oedichirus procerus Herman. ’’ Deposited in the American Museum of Natural History. (Both maxillary palpi are missing.)

PARATYPE: One female. Brazil: Bahia: Ilhaus (5 Ihéus), Mata da Esperanca, 01.29.1995, Atlantic forest, 50 m, 14 ° 479020S, 39 ° 039450W, D. Agosti, F95320 W3 ( AMNH). (I cannot find ‘‘Ilhaus’’ anywhere in Brazil. Ilhéus, at the coordinates included on the locality label, is probably the town to which the collector was referring.)

TYPE LOCALITY: Brazil: Bahia: Urucuca (5 Uruçuca), Cerro (5 Serra) Grande, 120 m, 14 ° 259170S, 39 ° 039430W.

DIAGNOSIS: The elytra of this species are longer than their combined width and the dorsal surface of the elytra is strongly concave; these two characters distinguish the species from all others in the New World except O. boehmi and O. ohausi , both of which have four labral denticles; O. procerus has two. The pronotum of O. procerus has a submedial row of coarse, moderately deep punctures, but O. boehmi has deep, submedial punctures that together form a prominent punctate groove. The pronotum of both O. boehmi and O. procerus is relatively sparsely punctate with large impunctate spots. The pronotum of O. ohausi is densely and coarsely punctate and the impunctate regions are smaller. Oedichirus procerus is smaller and more slender than either of these two more robust species (compare measurements of each). The anteroventral angles of tergum IX are separated in O. boehmi (fig. 64), but fused in O. procerus (fig. 197) and O. ohausi (fig. 186). For O. ohausi the right side of the anterior vulvar lobe is sclerotized (figs. 186, 187), but neither lobe is sclerotized in O. procerus (figs. 197, 198). The vulvar lobes of O. boehmi are largely sclerotized (figs. 64, 67). The male is unknown for O. procerus .

DESCRIPTION: Length: 6.1–7.0 mm. Length of head: 0.7 mm. Width of head: 0.7–0.8 mm. Pronotal length: 1.0– 1.1 mm. Pronotal width: 0.7–0.8 mm. Elytral length: 0.9–1.0 mm. Elytral width: 0.8 mm.

Reddish brown, head and abdominal segments VIII to X darker reddish brown in one specimen. Legs yellowish brown with slight infusion of reddish brown on apical portion of femur of each leg, but without distinct spot.

198. Segment IX, vulvar plate, enlarged (CLSM).

Head slightly wider than long (HW/HL: 1.1). Frontoclypeal ridge extending anteromedially toward and to near frontoclypeal margin. Dorsal surface without V-shaped depression; surface coarsely and sparsely punctate; punctation present across middle and laterally from base of antenna to base of head; surface impunctate anteriorly and basally. Labrum bidentate; denticle small and adjacent to median emargination; surface without submarginal tubercle.

Pronotum longer than wide (PL/PW: 1.4). Pronotum polished, with coarse, sparse punctation, and with large impunctate spots; punctation clustered submedially, laterally, and midanteriorly; submedial row of punctures forming moderately deep groove. Elytra longer than wide (EW/EL: 0.8); surface of disc moderately deeply and broadly concave and with coarse, dense punctation.

Abdominal terga III to VI with moderately dense punctation and impunctate subapically; punctures not arranged in distinct rows; terga VII and VIII sparsely and finely punctate. Segment III without paratergite; paratergal carina present and extending for nearly length of segment, but weakly developed beyond spiracle. Tergum III without medium point extending from transverse basal ridge. Tergum VIII with posterior margin nearly truncate; transverse basal ridge without median point. Tergum IX with lateroapical process longer than midbasal length (LLaP/T9: 1.7), moderately bent ventrally, and slightly divergent from other process; ventromedial margin without posteriorly directed spur (cf. fig. 158).

FEMALE: Sternum VIII with posterior margin rounded, more strongly rounded medially; transverse basal ridge broadly sinuate and microsinuate and without medi- an point. Tergum IX (figs. 197, 198) with anteroventral angles fused medially forming narrow strap. Median gonocoxal plate anteriad of vulvar plate reduced to narrow strap and separated from tergum IX (fig. 197); anterior margin rounded; gonocoxal plate posteriad of vulvar plate tapered to sinuate posterior margin. Anterior vulvar lobe large, transverse, membranous and extending along anterior margin of posterior vulvar lobe; surface wrinkled (fig. 198). Posterior vulvar lobe small and with cobble on surface of posterior two thirds (fig. 198). Vulva oriented at slight angle to longitudinal axis.

MALE: Unknown.

ETYMOLOGY: The name is from the Latin procerus , ‘‘long, tall,’’ and refers to the long, slender body and legs of this species.

DISTRIBUTION: Known only from the eastern portion of Bahia province, Brazil (fig. 40).

REMARKS: Whereas the vulvar plate of most of the species examined is more or less flat, that of O. procerus is deeply bowed inward toward the dorsal side of the segment that (see fig. 198, but seen best in lateral view on a slide mount) created a large transverse fold near the middle of the anterior vulvar lobe; this fold differs from invaginations of the surface seen in, for example, O. ohausi (fig. 187).

Figures

Figs. 39–40. Oedichirus species. Distribution. 39. Mesoamerica and the Caribbean. 40. South America. (Species described prior to present work preceded with *. Symbols ³ or ♀ signify species known only by the sex indicated. Open circle denotes multiple collecting sites.)

Figs. 197–198. Oedichirus procerus. 197. Segment IX, ventral, left lateroapical process broken, female.