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  • Bolcyrus formosissimus (Eastmann, 1905)


    Images:

    oilshale

    Taxonomy

    Eel

    Kingdom: Animalia
    Phylum: Chordata Haeckel 1874
    Class: Actinopteri Cope 1871
    Order: Anguilliformes Greenwood et al. 1966
    Family: Congridae Kaup 1856
    Genus: Bolcyrus
    Species: Bolcyrus formosissimus
    Author Citation (Eastmann, 1905)

    Geological Time Scale

    Eon: Phanerozoic
    Era: Cenozoic
    Period: Paleogene
    Sub Period: None
    Epoch: Eocene
    International Age: Lutetian

    Stratigraphy

    Monte Bolca Formation

    Biostratigraphy

    Alveolina dainelli Zone

    Provenance

    Acquired by: Purchase/Trade

    Dimensions

    Length: 20 cm

    Location

    Monte Bolca Quarry
    Bolca (Village)
    Veneto (Province)
    Italy

    Comments

    Taxonomy according Fossilworks.org.

    Diagnosis according to Blot 1978, p. 146: "Tête contenue un peu moins de six fois dans la longueur totale. Hauteur du corps contenue de quinze à dix-neuf fois dans la même longueur.
        Les deux branches de cleithra de longueurs équivalentes.  Côtes ventrales présentes. Osselets intermusculaires bien développés. Caudale constituée par neuf rayons s'articulant sur les hypuraux.
        Coefficient de concentration de la nageoire dorsale: 2,50, celui de l'anale étant aux environs de 2,85." 

    This translates: “Head contained a little less than six times in the total length. Height of the body contained from fifteen to nineteen times in the same length.
        Both cleithra branches of equivalent lengths.  Ventral ribs present. Intermuscular bones well developed. Caudal constituted by nine rays articulating on the hypurals.
       Coefficient of concentration of the dorsal fin: 2.50, that of the anal being around 2.85.”

    Line drawing of Bolcyrus formosissimus from Blot 1978, p. 149.

    886016942_Bolcyrusformosissimus.JPG.71aa986be6b579b8ae16cd21bdab2ee9.JPG

    Identified by oilshale using Blot 1978.

    References:

    Blot, J. (1976) Les anguilliformes fossiles du Monte Bolca. 2e Congres Europeen des Ichtyologistes Europeens, Paris, 1976, Revue Trav. Inst. Pech. Marit., Nantes, 40 (3&4) 509-511, 1 tabl. 

    Blot, J. (1978): Les apodes fossiles du Monte Bolca. Studi e Ricerche sui Giacimenti Terziari di Bolca 3:(1): 1-260, 120 fig, 21 tabl. 39pl.
    Blot, J. (1984): Les Apodes fossiles du Monte Bolca. 2. Actinopterygii : Ordre des Apodes (Anguilliformes): Famille des Paranguillidae Blot 1980. Museo civico di storia naturale di Verona, 1984, p. 62-238, 24 p. di tav.
    G. Carnevale, A. F. Bannikov, G. Marramá, J. C. Tyler, and R. Zorzin (2014): The Pesciara-Monte Postale Fossil-Lagerstätte: 2. Fishes and other vertebrates. Rendiconti della Società Paleontologica Italiana 4:37-63.




    User Feedback


    Beautiful fish! :wub:

    Don

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