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Chelychelynechen quassus
Taxonomy
Chelychelynechen quassus was named by Olson and James (1991). Its type specimen is USNM 389743, a partial skeleton (Associatedrostrum,mandible,and os entoglossum), and it is a 3D body fossil. Its type locality is Makewehi Dunes, which is in a Holocene interdune horizon in Hawaii. It is the type species of Chelychelynechen.
Synonymy list
| Year | Name and author |
|---|---|
| 1991 | Chelychelynechen quassus Olson and James p. 33 figs. Fig. 9 |
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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.
†Chelychelynechen quassus Olson and James 1991
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. L. Olson and H. F. James 1991 | Postcraniallya typical moa-nalo. Differs from Thambetochenand Ptaiochen in the unique shape of the rostrum, which is almost as high as it is long, with the palatal surface being much broader, especially so in the spaces between the two median ridgesand the edge of the bill. The occlusal surfaceof the dentaryis correspondinglybroadand flat,and bothjaws lackthe bony tooth- like projectionsof Thambetochenand Ptaiochen.In Chelychelynechenthe nostril is reducedand orientedalmost verticallyinstead of horizontally.In lateralview of the mandible,the symphysiscurvesupwardanteriorly,ratherthanbeingstraight, the coronoid areais much higherand more expanded,with the coronoid process much betterdeveloped and more dorsallysituated,and the retroarticularprocess markedlyshorterand deeper. |
Measurements
No measurements are available
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| Source: o = order | |||||
| References: Marsh 1875, Sedinger 1997 | |||||