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Ankonetta
Taxonomy
Ankonetta was named by Cenizo and Agnolín (2010).
It was assigned to Anatidae by Cenizo and Agnolín (2010) and Tambussi et al. (2023).
It was assigned to Anatidae by Cenizo and Agnolín (2010) and Tambussi et al. (2023).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2010 | Ankonetta Cenizo and Agnolín p. 499 |
| 2023 | Ankonetta Tambussi et al. p. 268 |
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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. †Ankonetta Cenizo and Agnolín 2010
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†Ankonetta larriestrai Cenizo and Agnolín 2010
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. M. Cenizo and F. L. Agnolín 2010 | Ankonetta is a mid-sized anatid that differs from remaining Anatidae, with the sole exception of Dendrocygna, in lacking a sulcus trochlearis on the distal and plantar surface of trochlea metatarsi II (see Figs 3F–H; 4A). Ankonetta differs from the latter genus in lacking a fossa para- hypotarsalis medialis. In addition, Ankonet- ta shows the following unique combination of traits among Anatidae (Figs 3A–H; 4): (1) proximal epiphysis with its proximal anteroposterior length subequal to its transverse width; (2) cotyla medialis proximo-medially projected and its medial edge weakly extended proximally; (3) lateral margin of proximal shaft strongly convex; (4) hypotarsus transversely compressed and located laterally with respect to the mid-length of the shaft; (5) eminentia intercotylaris massive and subquadrangu- lar in outline; (6) fossa infracotylaris deep and narrow; (7) lateral rim of trochlea metatarsi II very wide, forming a bulbous lobe along its dorsal surface; (8) proximo- medial corner of medial rim of trochlea metatarsi II in plantar view well developed, but not extended proximally like a crest; (9) in distal view, parallel dorsal and plantar articular surfaces; and (10) incisura intertrochlearis medialis shallow. |
Measurements
No measurements are available
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| Source: o = order | |||||
| References: Sedinger 1997, Marsh 1875 | |||||
Age range: Early/Lower Miocene or 23.03000 to 15.97000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Miocene | Argentina | A. larriestrai (43003) |