Cherevychnavis umanskae, Bochenski & Wertz & Tomek & Gorobets, 2019

Bochenski, Zbigniew M., Wertz, Krzysztof, Tomek, Teresa & Gorobets, Leonid, 2019, A new species of the late Miocene charadriiform bird (Aves: Charadriiformes), with a summary of all Paleogene and Miocene Charadrii remains, Zootaxa 4624 (1), pp. 41-58 : 53

Cherevychnavis umanskae gen. et sp. nov.

Etymology. The species is named after Alla Semenivna Umans’ka (Umanskaya—in publications in Russian), a female Ukrainian palaeontologist, who first realized that the specimens represent an extinct species, but passed away before describing it.

Holotype. An almost complete left coracoid, NMNHU-P, no.45-2453 ( Figs. 1–6 ), deposited at the National Museum of Natural History at the National Academy of Sciences of Ukraine, Kyiv, Ukraine.

Referred material. Proximal left humerus with shaft, NMNHU-P, no.45-2452 ( Figs. 7 –10 ), deposited at the National Museum of Natural History at the National Academy of Sciences of Ukraine, Kyiv, Ukraine. It is likely that the humerus represents the same extinct taxon as the holotype because the two bones were found at the same site, they match in size, and can be assigned to the same suborder Charadrii sensu Paton et al. (2003) , but because they were not found in articulation, it cannot be conclusively demonstrated that they belong to the same species.

Type locality and horizon. Cherevychne 3, located on the left banks of Khadzhibey Estuary, between the villages of Cherevychne and Morozovka (Bilyayivka District, Odessa Region, Ukraine; 46° 38′ 35″ N, 30° 37′ 12″ E); late Miocene, lower part of the Mammal Neogene Zone 12 ( MN 12) of the late Miocene (Tortonian), approximately 8-7.5 mya.

Diagnosis. As for the genus.

Measurements. Coracoid: total length, measured between omal tip of processus acrocoracoideus and angulus lateralis: 33.8 mm; width of the sternal facet, measured between angulus medialis and angulus lateralis: 12.6 mm. Humerus: length as preserved: 56.4 mm; proximal width, measured from tuberculum dorsale to outer margin of crista bicipitalis: 17.5 mm.

Figures

FIGURE 1. Holotype of Cherevychnavis umanskae sp. nov. (NMNHU-P, no.45-2453, left coracoid) in comparison to extant Charadrii species. Scale bars: 10 mm.

FIGURE 2. Coracoid, characters #1–7 (see text for details) that differentiate fossil Cherevychnavis umanskae from extant Charadrii genera.

FIGURE 3. Coracoid, characters #8–11 (see text for details) that differentiate fossil Cherevychnavis umanskae from extant Charadrii genera.

FIGURE 4. Coracoid, characters #12–15 (see text for details) that differentiate fossil Cherevychnavis umanskae from extant Charadrii genera.

FIGURE 5. Coracoid, characters #16–19 (see text for details) that differentiate fossil Cherevychnavis umanskae from extant Charadrii genera.

FIGURE 6. Coracoid, characters #20–22 (see text for details) that differentiate fossil Cherevychnavis umanskae from extant Charadrii genera.

FIGURE 7. Referred material of Cherevychnavis umanskae sp. nov. (NMNHU-P, no.45-2452, proximal left humerus) in comparison to extant Charadrii species. Scale bars: 10mm.

FIGURE 8. Humerus, characters #1–7 (see text for details) that differentiate fossil Cherevychnavis umanskae from extant Charadrii genera.

FIGURE 9. Humerus, characters #8–9 (see text for details) that differentiate fossil Cherevychnavis umanskae from extant Charadrii genera.

FIGURE 10. Humerus, characters #10–14 (see text for details) that differentiate fossil Cherevychnavis umanskae from extant Charadrii genera.