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Anabernicula
Taxonomy
Anabernicula was named by Ross (1935). It is not extant.
It was assigned to Anserinae by Wetmore (1940), Wetmore (1956); to Anatinae by Howard (1964); to Tadorninae by Brodkorb (1964), Howard (1972); to Tadornini by Emslie (1992); and to Anatini by Bickart (1990), Olson and Rasmussen (2001).
It was assigned to Anserinae by Wetmore (1940), Wetmore (1956); to Anatinae by Howard (1964); to Tadorninae by Brodkorb (1964), Howard (1972); to Tadornini by Emslie (1992); and to Anatini by Bickart (1990), Olson and Rasmussen (2001).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1935 | Anabernicula Ross |
| 1940 | Anabernicula Wetmore p. 20 |
| 1956 | Anabernicula Wetmore p. 27 |
| 1964 | Anabernicula Brodkorb p. 219 |
| 1964 | Anabernicula Howard p. 4 |
| 1972 | Anabernicula Howard p. 10 |
| 1990 | Anabernicula Bickart p. 34 |
| 1992 | Anabernicula Emslie p. 255 |
| 2001 | Anabernicula Olson and Rasmussen p. 284 |
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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. †Anabernicula Ross 1935
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†Anabernicula gracilenta Ross 1935
†Anabernicula oregonensis Howard 1964
†Anabernicula robusta Short 1970
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. Howard 1964 | Scapula combining gooselike anterior extension of acromion with ducklike absence of proximal foramen; distinguished from Tadorna by more even depression ofspace between acromion and glenoidfacetdorsally,andstraighter,lesattenuatedacromion. Coracoid: ventral margin oftrioseal canal rounded and heavy, with no overhang of furcular facet; upper end of bone above procoracoid facing slightly posteriorly (les internally than in Branta); internal distal angle blunt and thick dorsoventrally as in tadornines; distinguished from Tadorna by straighterprocoracoid and lesextensive depression oftriosseal canal. Humerus: attachment of head of triceps muscle separated from external
tuberosity by short space, and shaft immediately distal thereto raised to a distinct apex as in Tadorna; distinguished from Tadorna by distinct right-angled shoulder between head and capital groove, and short, rounded bicipital crest. Ulna: humero-ulnar depression well marked and bordered anconally by ridge; olecranon prominent and directed abruptly proximad from internal cotyla; external cotyla deflected medially at its distaltip;distinguishedfrom Tadornabypointeddistaltipofexternal cotylaand,distaly,bysmallexternalcondyleandleslaterallyprotruded carpal tuberosity. Carpometacarpus: process of metacarpal 1 prominent and more attenuated than in Tadorna, frequently with exostosis at tip; external surface of proximal end more rugose than in Tadorna, with distinct ridge connecting cuneiform and scapholunar ligamental attach- ments, and the latter attachment more posteriorly placed. Femur: shaft straight, trochanter slightly raised above proximal articulation, with pointed, forward-projecting tip; intercondylar space (anteriorly) wide and clearly defined; internal condyle rounded and thrust more laterally than in Branta, resembling Tadorna; shaft above fibular and external condyles bearing two large muscle scars of nearly equal size, at ap- proximately right angles to each other; distinguished from Tadorna by more medial, les posterior, rotation of proximal end and more acute angle between head and iliac facet. Tibiotarsus: outer cnemial crest slender and markedly curving to a hooked tip, and proximal articular surface overhanging shaft posteriorly as in Tadorna; distaly, supraten- dinal bridge deeply inset; relatively more slender bone than in Tadorna, with supratendinal bridge tipped posteriorly so as to lie horizontall rather than vertically (facing proximally rather than anteriorly). Tar- sometatarsus: hypotarsus short, with square-cornered outline in inner profile, undercut at its distal contact with shaft; internal border of shaft formingslightlongitudinalridgelateraltointernalborderofhypotarsus; posterior surface of shaft below hypotarsus with short, narrow, longi- tudinal groove medial to external margin of shaft, and broad, rounded ridge below central and internal crests of hypotarsus; shaft slender, with condyles flaring distally as in geese; condyles smaller and more abruptly flaredfrom shaftthan in Tadorna, and internalcondyle leselevated. |
Measurements
No measurements are available
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| Source: subf = subfamily, o = order | |||||
| References: Sedinger 1997, Marsh 1875 | |||||
Age range: base of the Piacenzian to the top of the Rancholabrean or 3.60000 to 0.01400 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Blancan | USA (Florida) | A. gracilenta (19753) | |
| Piacenzian | USA (Florida) | A. sp. (22712) | |
| Gelasian | USA (Florida) | A. gracilenta (20384) | |
| Irvingtonian | USA (Florida) | A. gracilenta (20400) | |
| Irvingtonian | USA (Nebraska) | A. robusta (20500) | |
| Rancholabrean | Mexico (Sonora) | A. oregonensis (20495) | |
| Late/Upper Pleistocene | USA (Oregon) | A. sp., A. oregonensis (93251) | |
| Late/Upper Pleistocene | USA (New Mexico) | A. oregonensis (71670) | |
| Late/Upper Pleistocene (high glacial) | USA (New Mexico) | A. sp. (76060) |