The first description of the male and ephippial female of Dadaya macrops (Daday, 1898) (Cladocera, Chydoridae), with additional notes on this common tropical species

Abstract

Males and ephippial females of Dadaya macrops (Daday), a widely distributed tropical cladoceran, are described for the first time together with hitherto unrecorded morphological features of the parthenogenetic female. The postabdomen of the male is unique among chydorids in having only a vestige of the terminal claw. This confirms the validity of this monotypic genus. The material studied comes from Sri Lanka (Ceylon), taken in the neighbourhood of the type locality. Our description provides a detailed morphological record of a population containing all instars of males and females, and both parthenogenetic and ephippial adult females. Type material of parthenogenetic females, the only forms hitherto known, agrees closely with our material. An analysis of the population structure is given.

New additions to the cladoceran fauna of Ciénaga Grande de Santa Marta and Colombia

“…According to Smirnov (1996) is a tropicopolitan species. It has been reported for Colombia in Córdoba and Santander departments (Barón-Rodríguez et al 2006;Álvarez 2010) Dadaya macrops has variations in the valves concerning to the presence or absence of a denticle in the inferoposterior angle as reported by Rajapaksa and Fernando (1982). For example, some specimens from other regions (e.g., Sri Lanka, Philippines, and Sáo Paulo Brazil) do not have denticles, but specimens from Paraguay and U.S.A have denticles.…”

Cladocera (Crustacea: Branchiopoda) of Vientiane province and municipality, Laos

“…Described from Sri Lanka (Daday, 1898) as Alona, then placed in the genus Dadaya (Sars, 1901). It is regarded as circumtropical (Smirnov, 1971(Smirnov, , 1996Rajapaksa and Fernando, 1982).…”

Cladocera (Crustacea: Branchiopoda) of Cat Tien National Park, South Vietnam

“…Littoral species, associated with the water surface. For a detailed description see Rajapaksa and Fernando (1982). The species was described from Sri Lanka, presumed to be circumtropical (Smirnov, 1996), common in the Oriental region.…”