ISSN:
1573-5192
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Aplectana gigantica Olsen, 1938 and Oxysomatium inglisi Anderson, 1964 (Cosmocercidae) have been re-examined. Study of cephalic, oesophageal and male caudal structures and of the egg demonstrates that both species belong in the Kathlaniidae and they are reclassified as Falcaustra inglisi (Anderson, 1964) n. comb. and Megalobatrachonema gigantica (Olsen, 1938) n. comb. The genus Megalobatrachonema Yamaguti, 1941 is divided into M. (Megalobatrachonema) n. subg. (with M. nipponica Yamaguti, 1941 and M. gigantica) and M. (Chabaudgolvania) n. subg. (with M. campanae Chabaud & Golvan, 1959 and M. terdentatum (Linstow, 1898)). M. (Chabaudgolvania) lacks oesophageal valves which are present in M. (Megalobatrachonema). It is suggested that F. inglisi and M. gigantica illustrate a trend in the evolution of the Kathlaniinae towards reduction of cephalic support structures and simplification of the oesophagus to a club-shaped form lacking valves. An evolutionary hypothesis linking the Kathlaniinae to the Quimperiidae (Seuratoidea) is presented. The genus Chabaudinema Díaz-Ungría, 1968 is synonymized with Spectatus Travassos, 1923 and its type species is designated Spectatus americana (Díaz-Ungría, 1968) n. comb. ac]19791109
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00009850
