Redescription of Cosberella conatoa Wray (Collembola: Hypogastruridae) and the description of C. lamaralexanderi

Abstract

ABSTRACT Cosberella conatoa Wray, 1963, the type and only species of the genus, is redescribed from the type specimens. Mucrella Fjellberg, 1985 is synonymized with Cosberella as characters that delimit Mucrella (e.g., reduced and hidden maxilla lamella 4, presence of eversible antennal sac, minute to moderately developed anal horns) also apply to C. conatoa. The six previously described species of Mucrella are transferred to Cosberella. Cosberella lamaralexanderi is newly described from Great Smoky Mountains National Park. It is differentiated from other species of Cosberella by its unusual body color and pattern (white to yellow-orange with a regular arrangement of dark violet spots), trilobed apical antennal bulb, and well-developed antennal sensory field.