Lo spratto del Caspio o kilka, Clupeonella caspia

Svetovidov, 1941

Nomi comuni esteri - Inglese - Caspius sprat, Caspian tyulka, kilka. Russo - Anchousovidnaya tyul'ka, Sardel'ka, Kaspiiskaya tyul'ka o kil'ka, tyulka, obyknovennaya tyul'ka. Polacco - Sardelka.

Clupeonella caspia Svetovidov, 1941. On the origin of "Clupeonella abrau" in relation to the development conditions of the herring population in the Caspian, Black and Azov seas C. R. (Doklady) Acad. Sci. URSS 805-809; v. 31 (n° 8) 808. Sinonimo senior, nuova combinazione, nomenclatura ICZN valida.

Clupeonella delicatula caspia Svetovidov, 1941. On the origin of "Clupeonella abrau" in relation to the development conditions of the herring population in the Caspian, Black and Azov seas C. R. (Doklady) Acad. Sci. URSS 805-809; v. 31 (n° 8) 808. Sinonimo senior, combinazione originale, nomenclatura ICZN non valida. Opinioni - Sinonimo di Clupeonella cultriventris (Nordmann 1840), ma valida sottospecie come da descrizione, per Kozlovsky 1991:55, Coad 1995:8, Reshetnikov et al. 1997:728. Sinonimo di Clupeonella cultriventris (Nordmann 1840), secondo Bogutskaya & Naseka 2004:38. Nomenclatura valida come Clupeonella caspia, secondo Kottelat & Freyhof 2007. Descritta anche come nuova specie in Svetovidov 1945:208. Lectotipo stabilito da Svetovidov 1952:199. Località tipo: delta del fiume Volga, Russia, mar Caspio. Tipo: ZIN 15883 (152 mm, non rintracciato nel 1996). Paralectotipi: ZIN 15883 (5 immaturi).

Clupeonella cultiventris caspia Svetovidov, 1941. On the origin of "Clupeonella abrau" in relation to the development conditions of the herring population in the Caspian, Black and Azov seas C. R. (Doklady) Acad. Sci. URSS 805-809; v. 31 (n° 8) 808. Sinonimo senior, nuova combinazione, nomenclatura ICZN non valida.

Note sulla sistematica - Dai dati disponibili sulle popolazioni di Clupeonella del mar nero e del Caspio, emerge una forte probabilità che esse siano morfologicamente e geneticamente distinte, inoltre hanno aree di distribuzione discrete e disgiunte. Sebbene siano difficili da attribuire, i dati elettroforetici sembrano suggerire che le due sottospecie non siano strettamente correlate. Stante la situazione confusa, l'unico dato fermo è che le due sottospecie sono morfologicamente distinte e popolano zone diverse, e non è evidente che esse siano collegate tra loro più di quanto non lo siano con altre specie del genere. La divisione in due sottospecie appare fuorviante e sembrerebbe più logico considerare i due gruppi come specie separate. La "morpha" tscharchalensis del bacino del Volga, inoltre è distinta da C. caspia per la morfologia, per habitat e distribuzione e, considerando i dati disponibili, sembra che debba essere considerata come buona specie.

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