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Academic & Professional Books  Insects & other Invertebrates  Molluscs  Molluscs: General

Palaeontos 27

Journal / Magazine
Series: Palaeontos Volume: 27
By: Jean-François Lesport(Author), Alain Cluzaud(Author), André Verhecken(Author), Jean-Michel Pacaud(Author), Daniel Ledon(Author), Philippe Loubry(Author)
120 pages, 25 plates with b/w photos; 20 illustrations, 13 tables
Palaeontos 27
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Palaeontos 27

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Language: One contribution in English, one in French

The Cenozoic Pleiotritoninae (Mollusca: Neogastropoda: Cancellarioidea: Cancellariidae) of the Aquitaine Basin, Southwestern France
The Cenozoic species belonging to the subfamily Plesiotritoninae Beu & Maxwell, 1987 (Cancellariidae) currently known from the Aquitaine Basin, southwestern France, are studied. Geological and geographical settings of the sites involved are specified. Apart from Loxotaphrus thorei (Grateloup, 1845), seven new species are described here: Plesiotriton aucoini, early Oligocene (late Rupelian) of Espibos, Gaas (Landes); P. camiadeorum, early Oligocene (late Rupelian) of Lagouarde, Gaas (Landes); P. ganensis and P. teuleraensis, both early Eocene (middle-late Ypresian, Cuisian) of La Teulere, Gan (Pyrénées-Atlantiques); Tritonoharpa aquitaniensis, early Miocene (early Burdigalian), Vives quarry, Meilhan (Landes); T. mariechristinae, middle Miocene (Langhian) of Gélis quarry, Le Houga (Gers); T. renardi, middle Miocene (Serravallian) of Carré or historically Carrey, Sallespisse (Pyrénées-Atlantiques).

Triton speciosum Bellardi, 1873 is here placed in Tritonoharpa; for Triton praetextum Bellardi, 1873 no position could be adopted for lack of good material.

The species introduced under the name Tritonidea (Cantharus) aturensis (Peyrot, 1927) is here considered to be an ecomorph of the very variable species Loxotaphrus thorei (Grateloup, 1845), besides L. thorei morph thorei, L. thorei morph estotiensis and L. thorei morph laevis. Loxotaphrus abnormis (Bayan, 1870) is considered to be different from L. thorei, but Loxotaphrus subtaurinensis (Vergneau, 1965) is considered to be a synonym of L. thorei. The new genus Beuella (Cancellariidae: Plesiotritoninae) is proposed for Tritonidea pisanelloides Cossmann in O’Gorman & Cossmann, 1923 of the Cuisian of Gan (Pyrénées-Atlantiques).

Les Plesiotritoninae (Mollusca, Gastropoda, Cancellariidae) de l’Eocène du Bassin de Paris, du Cotentin, de Loire-Atlantique et d’Aquitaine
Les espèces de l’Éocène du bassin de Paris, du Cotentin, de la Loire-Atlantique et d’Aquitaine appartenant à la sous-famille des Plesiotritoninae sont étudiées. 8 espèces sont décrites comme nouvelles : Plesiotriton cailloelensis nov. sp., P. evanesco nov. sp., P. calciatus nov. sp. et Colubratriton garini nov. sp. du Lutétien (Éocène moyen) du bassin de Paris; P. jacquesponsi nov. sp. et P. clandestinus nov. sp. du Bartonien (Éocène moyen) du bassin de Paris, Tritonoharpa caunbonensis nov. sp. du Bartonien (Éocène moyen) de la Loire-Atlantique et Colubratriton merlei nov. sp. du Cuisien (Yprésien, Éocène inférieur) du bassin d’Aquitaine. Le matériel type de Plesiotriton volutellus (Lamarck, 1803), espèce type du genre Plesiotriton, est considéré comme perdu; un néotype est désigné. Tritonoharpa caunbonensis nov. sp. du Bartonien (Éocène moyen) de la Loire-Atlantique représente la plus ancienne occurrence de ce genre et nous permet d’étendre sa longévité. Le nouveau genre Colubratriton est proposé pour l’espèce Plesiotriton deshayesianus Beu & Maxwell, 1987; un lectotype est désigné pour cette espèce. Les espèces nouvelles Fusiaphera esus nov. sp. du Cuisien (Yprésien, Éocène inférieur) du bassin de Paris et F. kassitiana nov. sp. du Maastrichtien (Crétacé supérieur) d’Iran sont introduites. Pisanella marieastridae n. nom. est proposé en remplacement de Voluta fusiformis Defrance, 1829 non Brocchi, 1814 nec Turton, 1819 nec Swainson, 1822.

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Journal / Magazine
Series: Palaeontos Volume: 27
By: Jean-François Lesport(Author), Alain Cluzaud(Author), André Verhecken(Author), Jean-Michel Pacaud(Author), Daniel Ledon(Author), Philippe Loubry(Author)
120 pages, 25 plates with b/w photos; 20 illustrations, 13 tables
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