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22 December 2023 Shallow-water Rissoidae of the genera Alvania Risso, 1826, Haurakia Iredale, 1915, Parashiela Laseron, 1956, Simulamerelina Ponder, 1985 and Subestea Cotton, 1944 (Gastropoda, Caenogastropoda, Rissooidea) from French Polynesia, with the description of a new deep-water genus
Bruno Amati, Andrea Di Giulio, Marco Oliverio
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Abstract

The extant species of the genera Alvania Risso, 1826, Haurakia Iredale, 1915, Parashiela Laseron, 1956, Simulamerelina Ponder, 1985 and Subestea Cotton, 1944 (Rissoidae Gray, 1847) collected in the shallow waters of French Polynesia are herein revised, for a total of 19 species. Additionally, a new genus for a new deep-water species is here introduced. Two species with wide range in the Pacific are reported: Haurakia marmorata (Hedley, 1907) and Parashiela ambulata Laseron, 1956. Five species of Alvania, one of Ellenstrongia n. gen., five of Parashiela, six of Simulamerelina and one Subestea are described as new: Alvania letourneuxi n. sp., Alvania herosae n. sp., Alvania parvimaculata n. sp., Alvania prosocostata n. sp., Alvania uapou n. sp., Ellenstrongia tarasoc n. gen., n. sp., Parashiela expansilabrum n. sp., Parashiela obesula n. sp., Parashiela rimatara n. sp., Parashiela rotundata n. sp., Parashiela soniae n. sp., Simulamerelina australes n. sp., Simulamerelina densestriata n. sp., Simulamerelina gracilis n. sp., Simulamerelina lepteseiras n. sp., Simulamerelina micrometrica n. sp., Simulamerelina tuamotu n. sp., Subestea moruroa n. sp. Three taxa are transferred to Alvania: Rissoa denseclathrata Thiele, 1925, Rissoa lusoria Yokoyama, 1926, Rissoa proditoris Thiele, 1925. Twelve species have a non-planktotrophic development; five of them are endemic to a single archipelago: Alvania letourneuxi n. sp., Simulamerelina gracilis n. sp., Simulamerelina tuamotu n. sp. to Tuamotu, Simulamerelina densestriata n. sp. to Australes, Parashiela soniae n. sp. to Marquesas. Of the eight species with planktotrophic development, two are apparently endemic to a single archipelago: Parashiela obesula n. sp. and Parashiela rimatara n. sp. to Australes.

Rissoidae des genres Alvania Risso, 1826, Haurakia Iredale, 1915, Parashiela Laseron, 1956, Simulamerelina Ponder, 1985 et Subestea Cotton, 1944 (Gastropoda, Caenogastropoda, Rissooidea) des eaux côtières de Polynésie française et description d'un nouveau genre bathyal.

Les espèces actuelles des genres Alvania Risso, 1826, Haurakia Iredale, 1915, Parashiela Laseron, 1956, Simulamerelina Ponder, 1985 et Subestea Cotton, 1944 (Rissoidae Gray, 1847) des eaux côtières de Polynésie française sont révisées, avec un total de 19 espèces; de plus, un nouveau genre est introduit pour une nouvelle espèce bathyale. Deux espèces à large distribution géographique dans le Pacifique sont signalées: Haurakia marmorata (Hedley, 1907) et Parashiela ambulata Laseron, 1956. Cinq espèces d'Alvania, une de Ellenstrongia n. gen., cinq de Parashiela, six de Simulamerelina et une Subestea sont décrites comme nouvelles: Alvania letourneuxi n. sp., Alvania herosae n. sp., Alvania parvimaculata n. sp., Alvania prosocostata n. sp., Alvania uapou n. sp., Ellenstrongia tarasoc n. gen., n. sp., Parashiela expansilabrum n. sp., Parashiela obesula n. sp., Parashiela rimatara n. sp., Parashiela rotundata n. sp., Parashiela soniae n. sp., Simulamerelina australes n. sp., Simulamerelina densestriata n. sp., Simulamerelina gracilis n. sp., Simulamerelina lepteseiras n. sp., Simulamerelina micrometrica n. sp., Simulamerelina tuamotu n. sp., Subestea moruroa n. sp. Trois taxons sont transférés vers Alvania : Rissoa denseclathrata Thiele, 1925, Rissoa lusoria Yokoyama, 1926, Rissoa proditoris Thiele, 1925. Douze espèces ont un développement non planctotrophe; cinq d'entre elles sont endémiques d'un seul archipel: Alvania letourneuxi n. sp., Simulamerelina gracilis n. sp., Simulamerelina tuamotu n. sp. des Tuamotu, Simulamerelina densestriata n. sp. des Australes et Parashiela soniae n. sp. des Marquises. Sur les huit espèces à développement planctotrophe, deux sont apparemment endémiques d'un seul archipel: Parashiela obesula n. sp. et Parashiela rimatara n. sp. des Australes.

Bruno Amati, Andrea Di Giulio, and Marco Oliverio "Shallow-water Rissoidae of the genera Alvania Risso, 1826, Haurakia Iredale, 1915, Parashiela Laseron, 1956, Simulamerelina Ponder, 1985 and Subestea Cotton, 1944 (Gastropoda, Caenogastropoda, Rissooidea) from French Polynesia, with the description of a new deep-water genus," Zoosystema 45(25), 803-892, (22 December 2023). https://doi.org/10.5252/zoosystema2023v45a25
Received: 20 March 2023; Accepted: 26 July 2023; Published: 22 December 2023
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KEYWORDS
combinaisons nouvelles
espèces nouvelles
French Polynesia
Gastropoda
Gastropoda
genre nouveau
new combinations
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