Corynoneura sp.

Fu, Yue & Saether, Ole A., 2012, 3536, Zootaxa 3536, pp. 1-61 : 45-46

Corynoneura sp. near lacustris Edwards

( Figs 22 A–F)

Corynoneura n. sp. 11 Bolton, 2007: 30

Material examined. USA, Ohio: Ashtabula County, Ashtabula River at Root Rd . Ohio, 1 pharate male, 3 larval exuviae, 30.viii.1995, J. T . Freda & M.J. Bolton; Ashtabula County, Mill Creek , RM 25 . 7 Clay Rd. , 2 pre-pupal larval exuviae, 22.ix. & 7.x.2003, J. T . Freda ( MJB) .

Diagnostic characters. The pharate male is similar to C. lacustris Edwards in having the rectangular inferior volsella and in the shape of the sternapodeme, but can be separated by having antenna with 11 flagellomeres, AR 0.39, and rectangular superior volsella. The larvae are separable by having unsculptured head capsule, mentum with three median teeth, lateral tooth adjacent to median tooth smaller, all antennal segments same colored, and length of antenna/ length of head 1.70–1.87, 1.77.

Pharate male (n = 1)

Coloration. Body entirely pale yellow. The limited characters which can be observed are: Antenna ( Fig. 22 A) with 11 flagellomeres, ultimate flagellomere 103 µm, AR 0.39; antenna apically expanded, with about 8 apical sensilla chaetica. Hind tibia distinctly expanded, with comb of 15 setae, one seta near spur S-shaped. Posterior margin of tergite IX slightly concave, with 4 long setae. Laterosternites IX with 1 long seta. Superior volsella small, rectangular, anteriomedially separated. Inferior volsella rectangular. Phallapodeme broad apically and strongly curved, 41 µm long, placed in caudal position of sternapodeme. Transverse sternapodeme very broad longitudinally, 28 µm wide. Gonocoxite 63 µm long. Gonostylus apically slightly curved, 36 µm long; megaseta 4 µm long. HR 1.75 ( Fig. 22 B–C).

Larva (n = 3)

Coloration. Entirely yellowish.

Head. Capsule length 224–248, 236 µm; width 140–148, 145 µm. Postmentum 200–220, 209 µm long. SII obvious, rising from small tubercle, SI simple, and SIII invisible. Premandible 24–28, 26 µm long. Mentum as in Fig. 22 D. Mandibles 53–59, 56 µm long. Antenna ( Fig. 22 E), AR 0.86–0.88, 0.87. Lengths of flagellomeres I–IV (in µm): 192–198, 195; 105–109, 107; 111–113, 112; 4–6, 5. Basal segment width 16–18, 17 µm; length of blade at apex of basal segment 29 µm. Length of antenna/length of head 1.70–1.87, 1.77.

Abdomen. Length of anal setae 141–172, 145 µm. Procercus 10–12, 11 µm long, 6–8, 7 µm wide. Subbasal setae of posterior parapods split as in Fig. 22 F, 48–55, 51 µm long. Posterior parapods 141–145, 142 µm long.