Melovatka 3 (Cretaceous of Russian Federation)

Where: Volgograd, Russian Federation (50.9° N, 44.7° E: paleocoordinates 43.1° N, 38.8° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Melovatka Formation, Middle Cenomanian (99.6 - 93.5 Ma)

• Lower part of formation - "phosphorite horizon". Actually two close but separate horizons that merge in places into a single horizon

• group of beds-level stratigraphic resolution

Environment/lithology: marine; concretionary, pebbly, brown, blue, sandy phosphorite and yellow sandstone

• "The two phosphorite horizons are separated in places by a yellowish sand interbed up to 1 m thick; however, they sometimes merge into a single horizon. The lower interbed or part of the integrated phosphorite horizon shows in places straight diagonal bedding, which is manifested in the orientation of almost flat pellets, pebbles, and pseudomorphs on bivalve shells. The phosphate concretions are irregular aggregates and rounded pebbles, ranging in size from several millimeters to 5–10 cm. They are dark brown or nearly black"

Size classes: macrofossils, mesofossils

Preservation: mold/impression, concretion

Collected in 1993; reposited in the PIN

Primary reference: A. O. Averianov, E. N. Kurochkin, E. M. Pervushov and A. V. Ivanov. 2005. Two bone fragments of ornithocheiroid pterosaurs from the Cenomanian of Volgograd Region, southern Russia. Acta Palaeontologica Polonica 50(2):289-294 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92399: authorized by Richard Butler, entered by Richard Butler on 10.11.2009, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Rhynchonellata
 Rhynchonellida - Rhynchonellidae
? Rhynchonella sp.2 Fischer 1809
Lingulata
 Lingulida - Lingulidae
Lingula sp.2 Bruguiére 1797
Bivalvia
 Pectinida - Pectinoidae
Neithea quinquecostata2 Sowerby 1814 scallop
Chlamys hispida2 scallop
 Ostreida - Gryphaeidae
 Pholadida - Corbulidae
 Cardiida -
 Cardiida - Veneridae
Flaventia plana2 venus clam
 Cardiida - Cardiidae
 Hiatellida - Hiatellidae
Chondrichthyes
 Squatiniformes - Squatinidae
Squatina sp.2 Dumeril 1806 angel shark
 Hybodontiformes - Polyacrodontidae
Polyacrodus sp.2 Jaekel 1889 elasmobranch
 Lamniformes - Cretoxyrhinidae
Cretolamna appendiculata2 Agassiz 1843 mackerel shark
 Lamniformes - Odontaspididae
Pseudoisurus denticulatus2 sand tiger shark
Eostriatolamia subulata2 sand tiger shark
Odontaspis sp.2 Agassiz 1843 sand tiger shark
 Synechodontiformes - Paraorthacodontidae
Paraorthacodus recurvus2 Trautschold 1877 elasmobranch
 Synechodontiformes - Palaeospinacidae
Synechodus dispar2 elasmobranch
  - Edaphodontidae
 Chimaeriformes - Callorhinchidae
Edaphodon sedgwicki2 Agassiz 1843 plownose chimaera
 Chimaeriformes - Chimaeridae
 Chimaeriformes - Callorhynchidae
Ischyodus latus2 Newton 1878 plownose chimaera
Gnathostomata
  -
Actinopteri
 Salmoniformes - Enchodontidae
Enchodontidae indet.2 Woodward 1901
Reptilia
 Testudines -
Chelonioidea indet. Baur 1893 sea turtle
Aves
 Ornithurae -
Cerebavis cenomanica n. gen. n. sp.2
Cerebavis cenomanica n. gen. n. sp.2 Kurochkin and Saveliev 2006 bird
Brain endocast
Reptilia
 Pterosauria -
Ornithocheiroidea indet. pterosaur
PIN 5028/3, partial humerus. PIN 5028/1, partial femur
Lonchodectes sp.1 Hooley 1914 pterosaur
PIN 5028/4
 Sauropterygia - Elasmosauridae
Elasmosauridae indet. Cope 1869 elasmosaur
 Sauropterygia - Pliosauridae
Pliosauridae indet. Seeley 1874 plesiosaur
 Ichthyosauria - Ophthalmosauridae
? Platypterygius sp.2 von Huene 1922 ichthyosaur
Demospongea
 Tetralithistida - Siphoniidae
Siphonia sp.2 Goldfuss 1826 demosponge
Jerea sp.2 Lamouroux 1821 demosponge
 Tetralithistida - Theonellidae
Phyllodermia sp.2 Schrammen 1924 demosponge
 Spirosclerophorida - Seliscothonidae
Seliscothon sp.2 Zittel 1878 demosponge