Cladocerans of genus Alona Baird, 1843 Cladocera Anomopoda Chydoridae and related genera from Aguascalientes State, Mexico
Sinev Artem, Y.; Silva-Briano, M.
Zootaxa 3569: 1-24
2012
ISSN/ISBN: 1175-5326
DOI: 10.11646/zootaxa.3569.1.1
Accession: 037402789
Eight cladoceran species of Alona s. lato and related genera were found in Aguascalientes state, Mexico, after extensive sampling efforts. Two of them are new for science. Both new species belong to the pulchella-group of Alona and share distinctive features of the group. Alona aguascalientensis sp. nov. differs from the other species of the group by the presence of denticles on posteroventral corner of valves, by a moderately elongated narrow postabdomen with weakly protruding distal angle and postanal marginal denticles of the same size, and by the morphology of major head pores, with connection between central and posterior pores always absent, while connection between anterior and central pores present or interrupted. A. anamariae sp. nov. differs from the other species of the group by the long last seta in the anterior group of setae of the ventral margin of valves, by short, relatively wide, evenly narrowing distally postabdomen, and by the small size (it is the smallest species of the group). Both new species seems to be endemic of Central Mexican Plateau. Other species found are A. glabra Sars, 1901, A. cf. guttata Sars, 1862, A. ossiani Sinev, 1908, A. setigera Megard, 1967, Coronatella circumfimbriata (Megard, 1967) and Leberis davidi (Richard, 1895).