Ordobrevia nubifer (Fall, 1901)

Hayashi, Masakazu, Kamite, Yuuki, Kobayashi, Takuya & Sota, Teiji, 2016, Description of larvae of genera Stenelmis, Ordobrevia and Nomuraelmis (Coleoptera: Elmidae: Elminae) of Japan with their molecular taxonomy, Zootaxa 4178 (4), pp. 451-480 : 476-479

Ordobrevia nubifer (Fall, 1901)

( Figs 16 D–F, 18)

Material examined. USA: California: 3 exs. (in ethanol) and 2 exs. (dried with an ultrathin coating of gold), Trinity Co.: 2 mi S Weaveryille, Weaver Creek , 14.VII.1988, W. D. Shepard leg.

Description. Body elongate, gradually narrowing from middle to apex; convex dorsally and flattened ventrally; slightly prominent spiracles on mesothorax and abdominal segments I–VIII. Body color entirely orange, and appendages orange. Dorsal and ventral surfaces entirely smooth, dorsum with long simple setae and long brush-like setae.

Head visible from above, well exposed from prothorax; as wide as long; clypeus transverse, with setae on front; a pair of small spines on both sides of clypeus; vertex smooth with brush-like setae.

Thorax not serrated on sides; dorsum entirely smooth with long brush-like setae. Prothorax longer than width, 2.2 times as long as mesothorax; with 3 ventral sclerites, procoxae closed posteriorly; branched setae on hind margins. Meso- and metathorax transverse; metathorax longer than mesothorax. Mesothorax with five ventral sclerites.

Abdomen 9-segmented; segments I–VIII transverse, dorsal surface entirely smooth with brush-like setae; pleural sclerites on segments I–VII. Brush-like setae on hind margin of segments I–VIII. Three to five teeth on lateral hind margin of segments I–VIII; tergal sutures on dorso-lateral area lacking. Last segment (segment IX) longer than wide, gradually narrowing to apex, without longitudinal ridge, apex with a pair of spines; dorsal surface smooth; ventral operculum, opercular claws, and anal gills present.

Identification. The larvae examined in this study were identified by W.D. Shepard. Distribution. North America.

Bibliography. Sanderson (1953, 1954).

Figures

FIGURE 16. Stenelmis canaliculata (Gyllenhal) from Austria (A – C) and Ordobrevia nubifer (Fall) from USA (D – F). A, D, dorsal view; B, E, lateral view; C, F, ventral view. All scale bars are 1.0 mm.