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Alca torda (razorbill)
Taxonomy
Alca torda was named by Linnaeus (1758). It is extant. Its type specimen is 1.
Synonymy list
Year | Name and author |
---|---|
1758 | Alca torda Linnaeus |
1959 | Alca torda Hamon p. 533 |
2001 | Alca torda Olson and Rasmussen p. 271 |
2002 | Alca torda Mlikovsky p. 140 |
2009 | Alca torda Wijnker and Olson p. 482 |
2011 | Alca torda Smith p. 30 figs. Figure 14 |
2011 | Alca torda Smith and Clarke p. 18 |
2014 | Alca torda del Hoyo et al. |
2017 | Alca torda Clements et al. |
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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.
Alca torda Linnaeus 1758 [razorbill]
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Diagnosis
Reference | Diagnosis | |
---|---|---|
N. A. Smith and J. A. Clarke 2011 | Alca torda is differentiated from other species of Alca by the following humeral characteristics: distal margin of posterior humeral head rounded as in A. stewarti and A. minor (53:0; pointed in A. olsoni, A. stewarti, A. ausonia, and A. grandis); dorsal margin of the primary pneumotricipital fossa (i.e., fossa pneumotricipitalis ventrale; Baumel and Witmer 1993) of A. torda and A. minor extends farther distally (65:1) than in all other Alca; primary pneumotricipital fossa rounded as in A. minor and A. stewarti (67:0; oval in all other Alca); distal edge of the primary pneumotricipital fossa straight as in A. carolinensis, A. grandis, A. olsoni, and A. stewarti (70:1; concave in A. minor and A. ausonia). The size of A. torda is intermediate between that of the smaller A. minor and the larger A. ausonia (Table 4 and Fig. 2). |
Measurements
No measurements are available
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Source: subo = suborder, o = order | |||||
References: Benton 1983, Marsh 1875, Bush and Bambach 2015 |
Age range: base of the Late/Upper Miocene to the top of the Holocene or 11.60800 to 0.00000 Ma
Collections (16 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Tortonian | USA (Maryland) | Alca torda (70853) | |
Late/Upper Miocene | USA (Maryland) | Alca torda (51717) | |
Messinian | USA (Virginia) | Alca torda (89551) | |
Zanclean | USA (North Carolina) | Alca torda (52582) | |
Early/Lower Pleistocene | United Kingdom (England) | Alca torda (58420) | |
Pleistocene | United Kingdom (Scotland) | Alca torda (125440) | |
Pleistocene | United Kingdom (England) | Alca torda (77749) | |
Late/Upper Pleistocene | Italy | Alca torda (122311) | |
Late/Upper Pleistocene | Spain | Alca torda (122309) | |
Late/Upper Pleistocene | United Kingdom (Wales) | Alca torda (124954 124955) | |
Late/Upper Pleistocene | Norway | Alca torda (73689) | |
Holocene | Finland | Alca torda (177177) | |
Holocene | United Kingdom (Wales) | Alca torda (125439) | |
Holocene | USA (Florida) | Alca torda (195050) | |
Holocene | USA (Maine) | Alca torda (122450) |