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Protobactrites styloideum
Taxonomy
Orthoceras styloideum was named by Barrande (1874). It is the type species of Protobactrites.
It was recombined as Protobactrites styloideum by Hyatt (1900).
It was recombined as Protobactrites styloideum by Hyatt (1900).
Synonymy list
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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.
†Protobactrites styloideum Barrande 1874
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Hyatt 1900 | Long pencil-shaped orthoceracones and cyrtoceracones, circular or compressed
elliptical in section, ornamented with transverse and sometimes longitudinal striae. Siphuncle tubular, centren or near the centre. Truncation occurs in some species, and others are more or less transitional to Bactrites among the Ammonoids. |