Sôbre Dipteropeltis hirundo Calman, crustáceo (Branchiura) parasito de peixes dágua doce

Abstract

O presente material que serve como base para a re-descrição de Dipteropeltis hirundo Calm. Consistem em quatro fêmeas nas quais foram encontrados Tretagonopterus aureus e T. rutilis em um pequeno rio do estado de S. Paulo, afluente do rio Paraná. O material original de Calman (1912) veio do Rio Paraguai (Corumbá) e espécimes de Moreira (1913; 1913a) foram coletados no mesmo rio. Dipteropeltis hirundo Calm. inclui, depois Moreira (1915), Talaus riberoi (mais tarde Moreiriella riberoi), mas este último trabalho tem sido negligenciado por Wilson (1932) que mencionem ambos os gêneros, Dipteropeltis Calm e Talaus Moreira como somente um válido. Como Dipteropeltis hirundo não parece ocorrer em tão grande número como as espécies de Argulus e Dolops, as vezes, o parasita não pode ser considerado muito nocivo aos peixes.

Additional morphological information on Dipteropeltis hirundo Calman, 1912, and a description of Dipteropeltis campanaformis n. sp. (Crustacea: Branchiura) from two characiform benthopelagic fish hosts from two Northern rivers of the Brazilian Amazon

“…Unfortunately, the specimens described by Moreira (1912Moreira ( , 1915 and Paiva Carvalho (1941) could not be examined as they could not be found; the former due to no museum allocation, and the latter due to incorrect accession number. Also, only micrographs were obtainable for the specimens described by Ringuelet (1943Ringuelet ( , 1948 because two of the three specimens have been misplaced.…”

“…One of the previous studies that requires further attention is the detailed description of D. hirundo by Paiva Carvalho (1941). The characteristics that stand out are that the carapace rarely exceeds the length of the abdomen; the suckers are large and supported by two layers of horizontal ribs and that the abdominal lobes lack caudal rami (Paiva Carvalho 1941).…”

“…The characteristics that stand out are that the carapace rarely exceeds the length of the abdomen; the suckers are large and supported by two layers of horizontal ribs and that the abdominal lobes lack caudal rami (Paiva Carvalho 1941). The specimens described in Paiva Carvalho (1941) could not be examined, however, based on the description and drawings provided (Paiva Carvalho 1941), it is believed that the specimens described are in fact D. campanaformis n. sp. Paiva Carvalho (1941) therefore inadvertently provided the first description of D.…”

“…Much later, Paiva Carvalho (1941) redescribed D. hirundo from four specimens collected in Boa Esperança, São Paulo. According to this description, specimens are three times longer than wide; the carapace lobes are shaped like wings and rarely exceed the length of the abdomen; they possess a pair of antennules and antennae; the suckers are supported by two layers of horizontal and parallel ribs along the edges of the disc; the mouth is a rounded disc with crescent-shaped mandibles; the maxillae are short and robust and have five segments, the third and fourth segments are provided with callouses; and the natatory lobes are in the infero-posterior position.…”

“…Later, a key to the Neotropical Branchiura was published together with a brief summary of the description of the species and a drawing of D. hirundo taken from Paiva Carvalho's (1941) re-description (Thatcher 1991).…”