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Colombophis portai
Taxonomy
Colombophis portai was named by Hoffstetter and Rage (1977). It is not a trace fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1977 | Colombophis portai Hoffstetter and Rage |
| 1984 | Colombophis portai Rage p. 11 |
| 1997 | Colombophis portai Hecht and LaDuke p. 95 |
| 2006 | Colombophis portai Head et al. p. 234 |
| 2010 | Colombophis portai Hsiou et al. p. 367 figs. 2-5 |
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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.
†Colombophis portai Hoffstetter and Rage 1977
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Hecht and T. LaDuke 1997 | Hoffstetter and Rage (1977) diagnose this species by its large size and the following vertebral characteristics: the notched posterior border of the neural arch, the slight inclination of the zygapophyseal facets, reduction of the neural spine to a tubercle, the broad, indistinct, posteriorly placed hemal keel, and the undifferentiated synapophyses (sensu Hoffstetter and Rage 1977; =paradiapophyses of Hecht and LaDuke 1988). To this, we add the unusual placement of the subcentral foramina, which occur on the ventral face of the centrum, close to the midsagittal plane and just posterior to the level of the synapophyses (fig. 4 in Hoffstetter and Rage 1977). These foramina are anterior to the abbreviated bernai keel and are usually subequal in size, but in some cases one member of the pair may be extremely enlarged or reduced, or absent altogether. | |
| A. S. Hsiou et al. 2010 | Colombophis portai differs from C. spinosus sp. nov. by its midtrunk vertebrae longer than broad,
with a very low neural spine, resembling a tubercle and circular in outline in dorsal view; thin to moderate zygosphene; anterolaterally orientated prezygapophyses; and undivided paradiapophyses. |