NMITA:
Neogene Marine
Biota of Tropical
America
NMITA:
Neogene Marine
Biota of Tropical
America
Morphologic Description: Similar to Cytheridea in shape but more ovate; type species with scattered tubercles on suface. Hinge an entomodont development similar to that in Progonocytherinae, consisting in LV of long crenulate anterior socket with about 15 pits, postjacent short high crenulate ridge merging into shallow furrow, and short posterior crenulate socket with about six pits; marginal areas regular, with fairly numerous straight radial canals; muscle scars in vertical row of four adductors, above which are three small scars, V-shaped antennal scar in front of top of row and mandibular scar in front of bottom of row, with second mandibular scar near ventral margin. Sexual dimorphism pronounced. Habitat typically brackish water. [Candona torosa Jones, 1850] (Treatise, Q276, fig. 201:3, 207:1).
Species:
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