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Retiolites (Pseudoretiolites)
Taxonomy
Retiolites (Pseudoretiolites) was named by Bouček and Münch (1944) [Sepkoski's age data: O Ashg S Ldov-m Sepkoski's reference number: 799,1066].
It was reranked as Pseudoretiolites by Lenz and Melchin (1987), Sepkoski (2002), Melchin et al. (2017).
It was assigned to Retiolites by Bouček and Münch (1944); to Graptoloidea by Sepkoski (2002); and to Retiolitinae by Lenz and Melchin (1987), Melchin et al. (2017).
It was reranked as Pseudoretiolites by Lenz and Melchin (1987), Sepkoski (2002), Melchin et al. (2017).
It was assigned to Retiolites by Bouček and Münch (1944); to Graptoloidea by Sepkoski (2002); and to Retiolitinae by Lenz and Melchin (1987), Melchin et al. (2017).
Synonymy list
| Year | Name and author |
|---|---|
| 1944 | Retiolites (Pseudoretiolites) Bouček and Münch p. 24 |
| 1987 | Pseudoretiolites Lenz and Melchin p. 163 |
| 2002 | Pseudoretiolites Sepkoski |
| 2017 | Pseudoretiolites Melchin et al. p. 126 |
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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.
Subg. †Retiolites (Pseudoretiolites) Bouček and Münch 1944
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. C. Lenz and M. J. Melchin 1987 | Prosicula characteristically present (pi. 1, fig. 7); metasicula rarely preserved (pi. 1, fig! 3). Corona developed from fourpronged ancora, hemispherical and basket-like, formed of 3-4 rows of gently spiralled lists joined to longitudinally arrayed lists (pi. 1, fig. 5). In specimens with metasicula, "struts" anchor sicula to reticula. First theca develops from clathrial list arising from mouth of sicula; second theca formed from clathrial bar emerging near top of sicula; remaining thecae developing in manner similar to that of Pseudoplegmatograptus. 'Floor' of theca marked by long median list arising from aboral list of previous theca and connected to lip of theca. Lip of theca formed of fine, laterally elongate meshes, divided medially by a zig-zag list. Thecae distinctly orthograptid in profile, with moderately accentuated lips and curved, anterolaterally directed apertures. Reticulum moderately fine, meshwork polygonal, with meshes of more or leass uniform size. Median region of both sides of rhabdosome generally bear large, irregularly shaped, thinwalled stomata, the margins of which stand above the adjacent reticula. Stomata at least twice the size of reticulum mesh-size. | |
| M. J. Melchin et al. 2017 | Ancora umbrella deep, with up to five whorls of spiral lists; prosicula and part of metasicula commonly preserved. Nema attached to thecal framework by connecting rods. Mid-ventral thecal lists present throughout, connecting distally to zigzag ventral thecal floors. Thecae with straight, outward-inclined ventral walls. Ancora sleeve reticulum composed of well-developed meshwork covering entire lateral walls. Stomata present. List surfaces smooth to weakly striated. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aeronian - Telychian | Serbia | Retiolites dentatus (145656) |