Atrochromadora Wieser, 1959

Venekey, Virag, Gheller, Paula F., Kandratavicius, Noelia, Cunha, Beatriz Pereira, Vilas-Boas, Ana Carolina, Fonseca, Gustavo & Maria, Tatiana F., 2019, The state of the art of Chromadoridae (Nematoda, Chromadorida): a historical review, diagnoses and comments about valid and dubious genera and a list of valid species, Zootaxa 4578 (1), pp. 1-67 : 8

Genus Atrochromadora Wieser, 1959

This genus was proposed by Wieser (1959a) with the original description of A. obscura Wieser, 1959 and to accommodate other three species [ A. dissoluta ( Wieser, 1954) , A. parva (de Man, 1893) , A. microlaima (de Man, 1889) ] previously placed in Chromadoropsis (described by Wieser 1954). The generic name Chromadoropsis was already preoccupied by Chromadoropsis Filipjev, 1918 and therefore it was necessary to propose a replacement name ( Wieser 1959a). Additionally, another species similar to A. parva was described later, A. denticullela Wieser & Hopper, 1967 , that differs from the type species by spacing of longitudinal rows at middle body level, length of spicules and spinneret and shape of the distal end of gubernaculum ( Wieser & Hopper 1967). Although Tchesunov (2014) considered 12 valid species in this genus, we can only account for five.

Diagnosis (modified from Tchesunov 2014): Cuticle with homogeneous punctation pattern along the entire body and with rows of larger dots forming lateral differentiation. Amphideal fovea transversely oval, open loopshaped. Buccal cavity usually with three solid teeth, dorsal tooth larger than ventrosublateral teeth. Males usually with cup-shaped precloacal supplements ( A. dissoluta , A. microlaima and A. obscura ) or supplements are absent ( A. denticulata and A. parva ). Marine.