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Taxon Pages
Bythocypris richarddinglei Brandão, 2008
Nomenclature
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Family: BythocyprididaeGenus: Bythocypris
SUMMARY
LV outline sub-rectangular; with smoothly arched dorsal margin; steep posterodorsal margin; broadly rounded anterior margin; slightly concave ventral margin; maximum height posterior to mid-length. RV subtrapezoidal; with fairly straight anterodorsal margin; sinuate posterodorsal margin; truncate anterior margin; concave ventral margin; maximum height at mid-length. LV and RV with obtuse posterior angle. Maximum length inferior to mid-height. Calcified inner lamella fairly narrow; zone of concrescence very narrow, with numerous straight marginal pore canals. Adductor muscle scars bythocypridid, occupying less than 1/3 of valve height.
Antennula very robust; with relatively short and very strongly sclerotized setae; podomeres II and III fused; chaetotaxy. Antenna stout; with short podomeres III, IV and VI; exopodite with 2 long and 1 tiny setae; podomere VI wider than long, with 1 long and 1 medium-sized claws, 1 tiny seta, and 2 medium-sized setae. Mandibula with 3 feathered setae on the exopodite; masticatory process with 1 or 2 bifurcate and 3 or 4 trifurcate teeth and several short setae. MaxilluIa with 7 strahlen and 24 or 25 feathered setae; ventral endite with 2 ventral setae and several broad, feathered, distal claws; other endites with 1 ventral seta each plus several simple distal setae; all setae of palp not feathered. Vibratory plate of fifth limb with 4 or 5 long strahlen and 10 medium-sized setae; podomeres of fifth to seventh limbs robust, with long and feathered terminal claws; exopodite of sixth and seventh limbs with or without 1 tiny seta. Furca with 2 short, 1 medium-sized, and 2 long feathered setae; one tiny seta between furcal rods. Genital lobe sub-oval with tubular internal process.