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Ardenna davealleni
Taxonomy
Ardenna davealleni was named by Jefferson (1991). Its type specimen is NMNZ S.45183, a partial skeleton, and it is a 3D body fossil. Its type locality is Ohawe Beach, Waipipian, which is in a Waipipian marine horizon in New Zealand.
Synonymy list
| Year | Name and author |
|---|---|
| 1991 | Ardenna davealleni Jefferson p. 3 figs. Fig. 1 |
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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.
†Ardenna davealleni Jefferson 1991
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. T. Jefferson 1991 | The fossils are referred to the genus Ardenna. Compared with species of Puffinus, the humerus of the fossil species has a rounded shaft (rather than dorsoventrally flattened), a deeper fossa brachialis and a less proximally angled processus supracondylaris dorsalis, a larger ulna to carpometacarpus length ratio, a straighter femur shaft, and a relatively shorter cnemial crest on the tibiotarsus. Compared with species of Calonectris, the humerus of the fossil species has a more rounded profile to the crista deltopectoralis and a smaller
processus supracondylaris dorsalis, a larger humerus to ulna length ratio, a smaller ulna to carpometacarpus length ratio, a smaller ulna to manus phalanx p digitus major length ratio, and a longer cnemial crest. The fossil species differs from all other species in the genus Ardenna by having a smaller ulna to manus phalanx p digitus major length ratio. It differs from A. grisea and A. tenuirostris in having a rounded humeral shaft, a deeper fossa brachialis, a relatively straighter femur shaft, a relatively shorter cnemial crest, and a less laterally flattened tarsometatarsus. The relative length of the cnemial crest is intermediate between that found in most species of Ardenna and that of A. grisea and A. tenuirostris. The species differs from A. carneipes, A. creatopus and A. gravis in having a more rounded crista deltopectoralis, and a smaller processus supracondylaris dorsalis. It differs from A. pacifica, A. bulleri, A. carneipes and A. creatopus in having a higher humerus to ulna length ratio. It differs from A. pacifica, A. bulleri, A. carneipes, A. creatopus and A. gravis in having lower ulna to carpometacarpus and ulna to femur length ratios, and in having a relatively longer cnemial crest. It differs from A. bulleri in having a less undercut caput humeri. It shares most characters with A. bulleri, but it is substantially larger than that species and is larger than all members of the genus except A. gravis. Its wing and leg bones are in the range of 14–24% longer than those of A. bulleri. It differs from fossil taxa of Ardenna primarily by a combination of size, proportions and age. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Bush and Bambach 2015, Marsh 1875, Benton 1983 | |||||