R.L.a Pinto, C.E.F.a Rocha, and K.b Martens (2005)
On the evolution of the genus Microdarwinula Danielopol, 1968 (Ostracoda, Darwinuldiae) with the description of a new species from semi-terrestrial habitats in São Paulo State (Brazil)
Crustaceana, 78(8):975-986.
A new species in the genus Microdarwinula, M. inexpectata n. sp., is reported from semiterrestrial habitats in São Paulo State, Brazil. Until the present findings, M. zimmeri (Menzel, 1916) was the only recent species known in the genus. Comparisons of valve and soft part morphology within the genus and among genera in the family Darwinulidae, corroborate recent studies suggesting that Microdarwinula originated from an ancestor in the genus Penthesilenula. The two species of Microdarwinula are the only darwinulids to lack an externally visible brooding cavity in the carapace. This could be a neotenic character, while soft parts appear to be fully developed. Microdarwinula zimmeri has a world-wide distribution, but it was never found in South America. On the other hand, M. inexpectata n. sp. is so far known only from two localities in São Paulo State. © 2005 Koninklijke Brill NV.
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