Redescription of Megalobatrachonema (Chabaudgolvania) elongata (Baird, 1858) n. comb. (Nematoda: Kathlaniidae) parasitic in North American salamanders

Abstract

Megalobatrachonema (Chabaudgolvania) elongata (Baird, 1858) n. comb, is redescribed based on specimens from Ambystoma tigrinum, A. lacustris, Ambystoma sp., and Rhyacosideron altamirani (Ambystomatidae) from various localities in Mexico. The species is transferred to Megalobatrachonema from Falcaustra because the oesophagus lacks valves and the oesophageal bulb is reduced in size. Megalobatrachonema (C.) elongata may be differentiated from the only other species in the same subgenus, M. (C.) terdentatum (Linstow, 1890), from Triturus spp. (Salamandridae) of Europe, by differences in oesophageal and cephalic morphology, and the distribution of caudal papillae in males.