Larval stages of trematodes from freshwater molluscs of the Yucatan Peninsula, Mexico

Title:

Larval stages of trematodes from freshwater molluscs of the Yucatan Peninsula, Mexico

Creator:

Ditrich, Oleg, Scholz, Tomáš, Aguirre-Macedo, Leopoldina, and Vargas-Vázquez, Joaquin

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:98405b49-af86-4d89-b23d-827cf9c7d330
uuid:98405b49-af86-4d89-b23d-827cf9c7d330
urnnbn:urn:nbn:cz:aba007-000dn5

Subject:

freshwater molluscs, Pyrgophorus coronatus, Trematoda, cercariae, Genarchella astyanactis, life-cycles, Yucatan, and Mexico

Type:

model:internalpart and TEXT

Format:

print

Description:

Examination of 4055 molluscs of 10 species from cenotes (= sinkholes) and other freshwater bodies in the Yucatan Peninsula, Mexico revealed the presence of-larval stages of 13 trematodes. The following species were found: Echinochasmus leopoldinae Scholz, Ditrich et Vargas-Vázquez, 1996, E. macrocaudatus Ditrich, Scholz et Vargas-Vázquez, 1996 (Echi-nostomatidae), Saccocoelioides sp. (? sogandaresi Lumsden, 1963) (Haploporidae), Crassicutis cichlasomae Manter, 1936, pleurolophocercous ophthalmocercaria sp. (Homalometridae), Ascocotyle (Ascocotyle) sp., Ascocotyle (Phagicola) nana Ransom, 1920 (Heterophyidae), Oligogonotylus manieri Watson, 1976 (Cryptogonimidae), Genarchella astyanactis (Watson, 1976) (Derogenidae), xiphidiocercariae sp. 1, 2 and 3 (Lecithodendriidae?), and furcocercaria gen. sp. (Fellodistomidae). The life-cycle of the derogenid Genarchella astyanactis was studied for the first time. It was found that it differs from that of G. genarchella: the first intermediate host, Pyrgophorus coronatus (Pfeiffer, 1839), released cystophorous furcocercariae of G. astyanactis that developed, after ingestion by the second intermediate host, copepods (experimentally Mesocyclops chaci Fiers, Reid, Ilife et Suárez-Morales, 1996), into metacercariae resembling by their morphology juvenile trematodes found in the stomach of Aslya-nax fasciatus. No progenetic cercariae (metacercariae) found in G. genarchella were observed in the life-cycle of G. astyanactis. Rediae and cystophorous furcocercariae were recovered from naturally infected snails and snails experimentally kept in contact with eggs from the uterus of G. astyanactis adults.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

109-127 and 31-49

Source:

Folia parasitologica | 1997 Volume:44 | Number:2

Harvested from:

CDK

Metadata only:

false