Assessment of Megadenus holothuricola Rosén, 1910 (Eulimidae), an endoparasite of Holothuria mexicana Ludwig, 1875 (Holothuriidae) in the southern Gulf of Mexico and the description a new species
Autor: | Stephanie Amador-Carrillo, Norma Emilia González-Vallejo |
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Rok vydání: | 2021 |
Předmět: |
0106 biological sciences
0301 basic medicine Micropygidae Spatangidae Palmyra Atoll Gastropoda Holothuria mexicana Pedinoida Aspidochirotida 01 natural sciences Littorinimorpha Echinothrix Megadenus holothuricola Bilateria Holothuroidea education.field_of_study biology Cephalornis 030108 mycology & parasitology symbiosis holothurians fishery Geography Research Article Echinodermata Coelenterata Aspidochirotacea Population gastropods 010607 zoology Nephrozoa Zoology Megadenus Holothuriidae Proboscis (genus) 03 medical and health sciences Systematics Eulimidae Animalia Holothuria education Ecology Evolution Behavior and Systematics new species Vanikoroidea Holothuriida biology.organism_classification QL1-991 Campeche Mollusca Animal Science and Zoology Americas Bay |
Zdroj: | ZooKeys, Vol 1016, Iss, Pp 49-61 (2021) ZooKeys 1016: 49-61 ZooKeys |
Popis: | As part of a study on holothurians from the southern Gulf of Mexico, some Holothuria mexicana Ludwig, 1875 were obtained for gut analysis. In two of them, a couple of eulimids were located inside the main tube of the respiratory tree. They were identified as Megadenus holothuricola Rosen, 1910, described from the Bahamas Islands, based on five specimens attached to the respiratory tree of H. mexicana . The original description was brief with few details, the type material is lost, and the species has not been found again. In this contribution, this species is confirmed for Campeche Bay, Mexico. The adult shell is globular to conical, transparent, thin, and fragile. Megadenus smithi sp. nov. from Palmyra Atoll, Central Pacific is described based on adult specimens. It differs from its congeneric species in its more robust shell, the pseudopallium does not cover the shell, and its short and contracted proboscis forms a thick disc. Further research on these eulimid parasites is now complicated in the southern Gulf of Mexico because of the holothurian population collapse due to over-exploitation of the fishery. |
Databáze: | OpenAIRE |
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