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Independent evolution of reproductive modes in viviparous freshwater Cerithioidea (Gastropoda, Sorbeoconcha) - a brief review

Glaubrecht, M.

Erscheinungsdatum: 2006
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Verkäufer ConchBooks (Harxheim, Deutschland)

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Beschreibung

In molluscs the majority of marine species is oviparous, whereas viviparity is frequently found among freshwater inhabitants. Here some findings from limnic gastropods are discussed and their evolutionary implications outlined. Recent studies reveal that live-bearing strategies have not only evolved repeatedly and independently among limnic gastropods, but also within limnic Cerithioidea, a diverse and speciose caenogastropod superfamily. Some of its constituent taxa evolved breeding along separate evolutionary avenues, involving distinct morphological structures (uterine brood sacs vs. subhaemocoelic brood pouches) and life-history strategies including nourishment of the brood via matrotrophy, as found in some species of Thiaridae s.str. It is concluded that (i) a uterine viviparous strategy, as found in lacustrine taxa from Lake Tanganyika (Lavigeria, Tiphobia), Lake Biwa in Japan (Semisulcospira) and from the central lakes on the Indonesian island of Sulawesi (Tylomelania), evolved several times in parallel, and (ii) that the subhaemocoelic brood pouch also derived convergently at least in the marine Planaxidae, some SE Asian Pachychilidae and the Thiaridae s.str., while the mesopodial brood pouch of the Tanganyikan paludomid Tanganyicia rufofilosa has to be considered again an independently evolved structure. 6 pp., gr. 8. Buchnummer des Verkäufers W18512

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Titel: Independent evolution of reproductive modes ...

Erscheinungsdatum: 2006

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Founded in 1985 we are specialized in worldwide literature on Mollusca and marine invertebrates. Our publishing house has meanwhile published approximately 60 titles on that field of interest. We have stocks of most available international books on Malacology and a huge amount of antiquarian literature, even of the latter most titles are only available once.

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