Mature larvae of Neoporus Guignot, 1931 collected from an Oklahoma stock pond and outlet stream were cultured into the adult stage, and identified as N. solitarius (Gemminger and Harold, 1868). Chaetotaxy of legs and urogomphi is comparable to that of previously described Neoporus, including secondary sensilla on the proximal urogomphal segment. Mandibular geometric parameters were as follows: MMD/ML, 0.10 ± 0.02; MBD/ML, 0.27 ± 0.03; angle of attack (AA), 46.6 ± 1.9°; lateral arc (Larc), 119.6 ± 2.9°; medial arc (Marc), 78.2 ± 5.2°. Respective cranial temporal curvature and orientation were 73.2 ± 8.6° and 13.9 ± 1.3°. Significant differences between dorsal and ventral intermandibular distances (DID = 0.71 ± 0.04 mm vs. VID = 0.49 ± 0.03 mm) appear to be major architectural and geometric features facilitating the oblique opening and closure of mandibles during prey capture and feeding.
Barman, E. H.
"A Description of the Mature Larva of Neoporus dimidiatus (Gemminger and Harold, 1868) (Coleoptera: Dytiscidae: Hydroporinae) with Notes on its Natural History,"
Georgia Journal of Science, Vol. 74, No. 2, Article 15.
Available at: http://digitalcommons.gaacademy.org/gjs/vol74/iss2/15