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Styracograptus mississippiensis
Taxonomy
Climacograptus mississippiensis was named by Ruedemann (1908) [= 1906 Climacograptus tubuliferus Lapworth; Elles & Wood, pp. 203, 204, pl. 27, fig. 8a–d; text-fig. 134a, b;
= 1983 Climacograptus tubuliferus Lapworth. – Koren’ &
Sobolevskaya (in Koren’ et al.), pp. 139–141 (partim), pl. 40, figs 6, 7, 9; text-fig. 51à–å, ê (non pl. 40, figs. 8, 10, 11; text-fig. 51æ–è, í–ë).
= 1989 Normalograptus tubuliferus (Lapworth, 1876). – Riva & Ketner, pp. 87–89, text-fig. 11a–e (non text-fig. 10a–i).
= 1997 Climacograptus tubuliferus Lapworth, 1876. – Goldman & Bergström, pp. 991, 993; text-figs 12A–H, ?13A–D, I–K; pl. 2, figs 1–3.].
It was recombined as Styracograptus mississippiensis by Storch et al. (2011).
It was recombined as Styracograptus mississippiensis by Storch et al. (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1908 | Climacograptus mississippiensis Ruedemann pp. 413, 414 figs. pl. 28, fig. 12; text-fig. 366 (non pl. 28, fig. 13; text-fig. 367 |
| 2011 | Styracograptus mississippiensis Storch et al. pp. 358 - 359 figs. 21C–F, J, P, Q, 22A, B, E, H, 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.
†Styracograptus mississippiensis Ruedemann 1908
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Storch et al. 2011 | Rhabdosome of moderate size with maximum length of 23.5 mm. Width at the first thecal pair 0.55–0.95 mm, increasing through 1.15–1.85 mm at th5 to a maximum of 1.5–2.0 mm attained by th6–th10 or later (Table 17). Truncated conical sicula ~1.0 mm long (up to 1.7mmincluding the secondary rod that replaces the prosicula) and 0.2–0.3 mm wide at the aperture. The sicula is furnished with 0.4–2.0 mm long virgella (3.85 mm in extreme) which is commonly seen to be initially deflexed across aperture margin before it turns straight down. Mature rhabdosomes with strong, 0.4–0.6 mm wide nema, which extends far beyond distal thecae. Rather strong nema crossbars are commonly pressed through lateral walls of aseptate rhabdosome. Thecae climacograptid, with prominent geniculum and parallel-sided or slightly inclined supragenicular walls. 2TRD2 1.4–1.8 mm increasing to 1.6–2.0 mm at th10. Distal thecae number ca 10 in 10 mm (2TRDdist 1.85–2.1 mm). |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Collections (19 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Katian | USA (Nevada) | Styracograptus mississippiensis (145800 145802 145804 145805) | |
| Ashgill | USA (Nevada) | Styracograptus mississippiensis (145606 145607 145608 145609 145611 145612 145613 145737 145739 145740 145741 145742 145744 145745 145746) |