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Cyrtograptus ellesae
Taxonomy
Cyrtograptus ellesi was named by Gortani (1923) [= 1900 Cyrtograptus rigidus, Tullb.; Elles, p. 409, text-fig. 23, pl. 24, fig. 2A–C.
= 1914 Cyrtograptus rigidus, Tullberg; Elles and Wood, p. 508, pl. 52, fig. 2a–c, text-fig. 354a–b.
= 1994a C. perneri Boucek; Storch, fig. 7F.
Lectotype designated by Williams & Zalasiewicz 2004.]. Its type specimen is SM A22441 and is a 3D body fossil.
It was corrected as Cyrtograptus ellesae by Zalasiewicz and Williams (1999) and Williams and Zalasiewicz (2004).
It was corrected as Cyrtograptus ellesae by Zalasiewicz and Williams (1999) and Williams and Zalasiewicz (2004).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1923 | Cyrtograptus ellesi Gortani p. 61 |
| 1999 | Cyrtograptus ellesae Zalasiewicz and Williams fig. 10c |
| 2004 | Cyrtograptus ellesae Williams and Zalasiewicz pp. 236 - 239 fig. 6A–M |
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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.
†Cyrtograptus ellesae Gortani 1923
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Williams and J. A. Zalasiewicz 2004 | Cyrtograptus with a single cladium arising at the level of theca 16–20. Procladium gently dorsally curved to level of origination of cladium, thereafter exhibiting very rapid torsion through 180 degrees one to two thecae after the cladium arises. Proximalmost thecae axially elongate with short metathecal hooks. Thereafter gradually broadening and becoming more triangulate; beyond theca 10 the metathecae are distinctly triangulate and bear lateral processes. |