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PLESIOPHYSA DOLICHOMASTIX SP. N. (GASTROPODA: PLANORBIDAE)
Paraense, W. Lobato | Date Issued:
2002
Author
Affilliation
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Malacologia. Rio de Janeiro, RJ, Brasil.
Abstract
A new species of planorbid mollusc, Plesiophysa dolichomastix (Greek dolichos = long, mastix = flagellum),
collected from Lagoa da Pedra, municipality of Santa Rosa, state of Goiás, Brazil (15°01’S, 47°13’W) is described.
It is indistinguishable by the shell characters from the five congeneric species described so far: P. striata (Orbigny,
1841), P. granulata (“Shuttleworth” Sowerby, 1873), P. guadeloupensis (“Fischer” Mazé, 1883), P. ornata (Haas,
1938) and P. hubendicki Richards & Ferguson, 1962. It differs from the anatomically studied species in the following
characters: about 50 ovotestis diverticula, against 12 in granulata, 100 in ornata, unstated in hubendicki; and
length of flagella – about as long as the penial complex –, against about 1/3 to 1/6 in the other three.
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