Description of larvae of genera Stenelmis, Ordobrevia and Nomuraelmis (Coleoptera: Elmidae: Elminae) of Japan with their molecular taxonomy Author Hayashi, Masakazu Author Kamite, Yuuki Author Kobayashi, Takuya Author Sota, Teiji text Zootaxa 2016 4178 4 451 480 journal article 10.11646/zootaxa.4178.4.1 6128fc99-1d94-4dea-a13a-bcc6dbe69b2a 1175-5326 260983 5D1AEC7E-A84F-4653-9415-CD29DAA467CB Nomuraelmis amamiensis M. Satô 1964 ( Figs 4 G–L, 15) Materials examined . JAPAN : Kagoshima Prefecture : Amami-Ôshima Is. : 1 ex. (in 70% ethanol), Kinsakubaru , 26.iii.1997 , H. Yoshitomi leg. ; 1 ex. (dried), Toguci , Tatsugô-chô , 21.xii.1999 , H. Moriya leg. ; Okinawa Prefecture : Okinawajima Is. : 1 ex. (dried), Oku , Kunigami-son, H. Moriya leg.; 2 exs. (in 60% ethanol), Okugawa-sairyû, Oku, Kunigami-son, 26.vii.2015 , YK leg.; 1 ex. (in 60% ethanol) and 1 ex. (dried with an ultrathin coating of gold), Genka-ôkawa-shiryû, Genka, Nago-shi, 24.vii.2015 , YK leg.; 2 exs., (in 60% ethanol), ditto, 25.vii.2015 , YK 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 yellowish brown. Dorsal and ventral surfaces entirely not smooth. Head visible from above, well exposed from prothorax; as wide as long; clypeus transverse; a pair of spines on both sides of clypeus; vertex with brush-like setae. Thorax not serrated on sides; dorsal surface not smooth with brush-like setae. Prothorax longer than width, 2.5 times as long as mesothorax; with three ventral sclerites, procoxae closed posteriorly; scale-like setae on hind margins. Meso- and metathorax transverse; metathorax longer than mesothorax. Mesothorax with five ventral sclerites. Abdomen 9-segmented; segments I–VIII transverse, dorsum not smooth with minute spines; pleural sclerites on segments I–VII; tergal sutures on dorso-lateral area lacking. Last segment (segment IX) longer than wide, robust in base, narrowing to apex, without longitudinal ridge, apex with a pair of very small spines; dorsal and ventral surfaces not smooth; ventral operculum, opercular claws, and anal gills present. Habitat . Headwaters to upper stream reaches; larvae live in the gravel substrate. Identification . The larva was reported by Yoshitomi (2006) . Distribution . Ryukyus: Amami-Ôshima Is. ( type locality), Okinawajima Is., Tokashikijima Is. Bibliography . Yoshitomi (2006: fig. 2A–B) .