Bibliography and Index of the Sirenia and Desmostylia  

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"Averianov, Alexander"

Averianov, Alexander O.; Yarkov, Alexander A. (detail)
Enigmatic bilophodont molariform tooth from the Eocene of Central Russia.
Russian Jour. of Theriology 5(2): 55-57. 1 fig.
–In Engl.; Russian summ. ABSTRACT: A partial upper molariform tooth from the Upper(?) Eocene of Srednyaya Akhtuba, Volgograd Province, is described. The tooth is characterized by an incipient bilophodont structure with paracone and metacone placed extremely labially and almost without the labial cingulum. The tooth is compared with the members of mammalian orders Rodentia, Perissodactyla, Embrithopoda, Proboscidea, and Sirenia having the bilophodont dentition. It is most similar with the teeth of extinct sea cows of the family Dugongidae and may belong to this group.
Averianov, Alexander O.; Zvonok, Evgeny (detail)
First sirenian remains from the Palaeogene of Crimea.
Historical Biology DOI: 10.1080/08912963.2020.1852558 Publ. online Jan. 4, 2021.
–ABSTRACT: Fragmentary remains, including two anterior premolars, axis fragment, a phalanx, and rib fragments from the Middle Eocene (late Bartonian) Ak-Kaya locality represent the first sirenian fossils from the Paleogene of Crimea. The lower p3 shows some similarity with p3 in the dugongid Eotheroides sp. from the Eocene of North America. The axis is similar in proportions to the axis of the stem sirenian Sobrarbesiren from the Middle Eocene of Spain. The manual(?) phalanx suggests a semiaquatic adaptation of the Crimean sirenian. These remains are identified as Sirenia indet. with possible affinities with the Dugongidae.

Daryl P. Domning, Research Associate, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, and Laboratory of Evolutionary Biology, Department of Anatomy, College of Medicine, Howard University, Washington, D.C. 20059.
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