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Oligonomus milleri
Taxonomy
Oligonomus milleri was named by De Pietri et al. (2015). Its type specimen is SAMA P27976, a limb element (left coracoid lacking sternal end), and it is a 3D body fossil. Its type locality is Steve's Site, Lake Palankarinna, which is in an Oligocene lacustrine claystone/siltstone in the Etadunna Formation of Australia.
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Oligonomus milleri De Pietri et al. p. 70 |
| 2020 | Oligonomus milleri Worthy and Nguyen p. 94 |
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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.
†Oligonomus milleri De Pietri et al. 2015
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| V. L. De Pietri et al. 2015 | Within the size range of P. torquatus, from which it differs in: (1) dorsolaterally developed ligamental attachment area adjacent to dorsal portion of facies articularis clavicularis (Fig. 1b,l) absent; (2) sulcus m. supracoracoidei deeper (Fig. 1a); (3) dorsal margin that is the lateral portion of the canalis triosseus (triosseal canal) more elongated omal- sternally (Fig. 1a, compare with b); (4) processus acrocoracoideus more elevated omally (Fig. 1a, compare with b,g). Oligonomus milleri agrees with other members of Scolopaci in these features (1–4), but differs from the coracoids of Scolopaci- dae, Rostratulidae, Thinocoridae, Jacanidae in: (5) absence of recess in sulcus m. supracoracoidei under facies articularis clavicularis. From Scolopac- idae, Rostratulidae, Thinocoridae in: (6) shaft lack- ing abrupt widening sternally towards impressio m. sternocoracoidei; (7) ligamental attachment on margo medialis of corpus coracoidei located closer to sternal end; character (8) base of processus procoracoideus merging with margo medialis of corpus coracoidei at low angle (Fig. 1a,b, compare
with e). From Scolopacidae, Jacanidae in: (9) length of facies articularis humeralis proportionally short, with cotyla scapularis about half its length (facies articularis humeralis more elongated in these taxa, Fig. 1d,e). From Scolopacidae and Thinocoridae in: (10) impressio lig. acrocoraco- humeralis dorsoventrally broad (instead of medio- laterally elongated, Fig. 1o). From Rostratulidae in: (11) dorsal part of sulcus m. supracoracoidei deepened relative to ventral part (instead of evenly deep, Fig. 1m); (12) dorsal portion of facies articularis clavicularis with lesser sternal projection (Fig. 1m); (13) facies articularis clavicularis broader in omal-sternal direction (Fig. 1m). |
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: Late/Upper Oligocene or 27.30000 to 23.04000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Oligocene | Australia (South Australia) | Oligonomus milleri (type locality: 137265) |