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  • Author or Editor: Odile Bain x
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A new genus and six new species of nematodes (Ungellidae, Drilonematoidea) parasitic in earthworms deposited in the Muséum National d’Histoire Naturelle, Paris, are described. Except for Ungella haitiana sp. n., all nematodes were found in West African oligochaetes. Chabaudigella perforata gen. n., sp. n. is distinguished by having a single row of minute pores on each lateral chord, cephalic hooks in a subdorsal pit with cuticularised rims, excretory pore opposite pharyngeal base, post-uterine sac, pouch-like vagina, short, non-cephalate spicules, and bristle-like male caudal sensilla. Ungella haitiana sp. n. is distinguished by presence of large pocket-like amphids, excretory pore posterior to isthmus, slim pharynx, female body posteriorly expanded, ovary tip in tail, vulva post-median, asymmetrical caudal organs, long spicules; U. millsoniae sp. n. by its small size, indistinct amphids, excretory pore posterior to pharynx base, ovary tip posterior to mid-body, distal ovary portion reflexed, female caudal organs large, with cavity, spicules strongly bent; U. agastrodrilii sp. n. by cephalic hooks in subdorsal pit, male with swollen body, short conical tail and symmetrical caudal organs situated shortly posterior to anus. Ungella barbaulti sp. n. is distinguished by its small size, short and thin cephalic hooks, large amphids, vulva median, post-uterine sac absent, and short spicules; U. lamto sp. n. by its small size; cephalic hooks in subdorsal pit, indistinct amphids; post-uterine sac absent, ovary tip between vulva and anus, median vulva, oblique vagina, caudal organs prominent, spicules short, broadly cephalate, precloacal supplement and bristle-like male caudal sensilla present. Keys to genera of Ungellinae and Ungella are given.

In: Nematology

Abstract

A new species of the nematode taxon Diplogastridae is described on morphology and additional molecular data. The new species cannot be grouped in any of the currently accepted diplogastrid genera. Therefore, we introduce the new genus Cutidiplogaster n. gen. along with the description of our new species Cutidiplogaster manati n. gen., n. sp. Cutidiplogaster manati n. gen., n. sp. was isolated from skin lesions of manatees, Trichechus manatus manatus, kept in Okinawa Churaumi Aquarium, Japan. The specimens were found anchored with their extraordinarily long tails to the small, thick epidermal bumps within thread algae that form part of the epizoic community on the manatee skin. Cutidiplogaster manati n. gen., n. sp. is characterised by the tube-shaped and finely annulated postdental part of the stegostom that makes it distinct from all other Diplogastridae so far known, and the coiled long tail that makes it unique in comparison with all known diplogastrids. On the basis of detail in stoma morphology in C. manati n. gen., n. sp., we discuss implications in homologising diplogastrid mouthparts and their evolution.

In: Nematology