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Chenoanas
Taxonomy
Chenoanas was named by Zelenkov (2012).
It was assigned to Anatinae by Zelenkov (2012); and to Anatidae by Zelenkov et al. (2018).
It was assigned to Anatinae by Zelenkov (2012); and to Anatidae by Zelenkov et al. (2018).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Chenoanas Zelenkov p. 520 figs. Figs. 1, 2 |
| 2018 | Chenoanas Zelenkov et al. p. 311 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Chenoanas Zelenkov 2012
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†Chenoanas asiatica Zelenkov et al. 2018
†Chenoanas deserta Zelenkov 2012
†Chenoanas sansaniensis Milne-Edwards 1867
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N. V. Zelenkov et al. 2018 | Humerus: in caudal view, caput humeri dorsoventrally at least twice wider than proximodistally high; in cranial view, incisura capitis forming distinct, relatively shallow incisure in the proximal margin of the bone; tuberculum dorsale subtrian- gular in outline, its proximal part raised and positioned at the level of the caput humeri, and the distal part is almost flush with caudal bone surface or only slightly elevated above it; the capital shaft ridge is moderately developed and is not sharp; it is directed towards the ventral half of tuberculum dorsale; the fossa pneumotricipitalis ventralis is deep and well pneumatized, its opening facing distocau- dally (tuberculum ventrale is proximocaudally oriented). Coracoid: In cranial view, the transverse (mediolateral) axis of the processus acrocoracoideus (the plane through the depth of the process) forms acute angle with the plane of the shaft (acrocoracoid poorly inclined ventrally); the sul- cus m. supracoracoidei is excavated markedly and not pneumatized; the tuberculum brachiale overhangs the sulcus m. supracoracoidei throughout its whole depth; the medial margin of the shaft almost does not incline medially toward the omal end; the processus acrocoracoideus pro- trudes beyond the medial margin of the shaft; and the facies articularis humeralis is dorsoventrally wide (its dorsoventral depth roughly equals its craniocaudal length). Tibiotarsus: the longitudinal axis of the condylus lateralis is proximodistally aligned and distally does not incline medi- ally; the condyli are proximodistally short in cranial view (shorter than the width of the incisura intercondylaris); in distal view, the incisura intercondylaris is shallow and wide (slightly wider than the condylus lateralis); and the condyli subequally protrude cranially. |
Measurements
No measurements are available
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| Source: o = order | |||||
| References: Sedinger 1997, Marsh 1875, Kiessling 2004 | |||||
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| MN 5 | Russian Federation (Irkutsk) | C. sansaniensis (205812) | |
| Langhian - Serravallian | France (Midi-Pyrenees) | Anas sansaniensis (32191) | |
| Serravallian | China (Nei Mongol) | C. asiatica (28782) | |
| Serravallian | Mongolia | C. deserta, C. asiatica (180876) | |
| Vallesian | Austria | Anas sansaniensis (192458) |