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THATCHER,Vernon E.. |
Studies of the cymothoid isopod Livoneca symmetricaVan Name, 1925, showed that this species has characters that preclude its inclusion in LivonecaLeach, 1818, or in any other known genus. The species is redescribed on the basis of male and female specimens from the mouth cavities of Amazonian piranhas (Serrasalmus spilopleura(Kner) and S. elongatusKner) and Vanameagen. nov. is proposed for it. The new genus is defined as having: a cephalon that is not immersed in pereonite 1; mandibles that are "foot-shaped" and without incisors, pereopods that are long and unequal in size and shape; a pleon that is not immersed in the pereon; and a pleotelson that is inflated anteriorly and medially. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isopod; Cymothoid; Parasite; Piranha; Amazon. |
Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671993000300287 |
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CHERNELA,Janet M.; THATCHER,Vernon E.. |
Studies were made of the intestinal parasites of Amerindian populations of the Uaupes River basin of Brazil. Three groups were sampled: 1) Tukano fisher-agriculturalists who live in permanent riverine villages; 2) Maku hunter-horticulturalists who live in close contact with the Tukano fishing villages; and 3) Maku who inhabit the forest interior and have little contact with permanent settlements. Fecal samples were collected from 498 individuals of which 220 were from the first group, 135 from de second and 143 from the third. The samples were analyzed by means of microflotation and centrifugal sedimentation. A total of 18 protozoan and helminth species were recorded based on the presence of cysts or eggs. These included five nematode species that could... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascaris; Roundworms; Parasites; Helminths; Indians. |
Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671993000100025 |
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THATCHER,Vernon E.. |
Anphira branchialisgen. et sp. nov. (Crustacea, Isopoda, Cymothoidae) is described from the dorsal areas of the gill chambers of three species of piranhas (Serrasalmusspp.). The fishes were caught in rivers near Manaus, Amazonas State and on Maracá island, Federal Territory of Roraima, Brasil. The new genus and species is characterized by having large, flat coxal plates on ail 7 pereonites. These plates usually extend beyond the margins of the following segments and the 7th ones extend nearly to the pleotelson and cover the lateral margins of the pleonites. The mandible of this species is rounded, "foot shaped" and without incisor. The mandibular palp is short and stout. The maxillules have 3 terminal and 2 subterminal spines. The pleopods are simple... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isopod; Cymothoid; Parasite; Piranha; Amazon. |
Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671993000300297 |
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