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Taxonomy
Rafanoglossella was named by Havlicek (1998). Its type is Lingula leiskowiensis.
It was assigned to Glossellinae by Havlicek (1998).
It was assigned to Glossellinae by Havlicek (1998).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Rafanoglossella Havlicek pp. 161 - 162 |
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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.
G. †Rafanoglossella Havlicek 1998
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†Rafanoglossella deleta Barrande 1879
†Rafanoglossella generosa Havlicek 1998
†Rafanoglossella leiskowiensis Barrande 1879
†Rafanoglossella siliqua Havlicek 1994
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| V. Havlicek 1998 | Shell of lingulid appearance, lenticular in longitudinal and transverse profiles, of variable size, with nearly straight to gently convex sides. Ventral beak orthocline, pseudointerarea absent; internal area (term used by Havlicek 1982, p. 13) not elevated above the inner valve surface; for this reason, its anterior margin is obscure. Pedicle groove shallow, gently narrowing posteriorly. Dorsal beak marginal, more convex than the ventral one. Dorsal pseudointerarea absent. Ornamentation consists of fine concentric rugellae often underlain by swollen concentric bands, and even finer radiating capillae. Pedicle valve interior distinguished by a pair of weak to well-developed submedian, anteriorly gently diverging ridges . Interior of brachial valve bears a strong median ridge angular in cross-section, often with a fine groove on its crest. The dorsal ridge is strongest at its steeply sloping anterior face. Straight to gently arcuate vascula lateralia established only in R. siliqua. Elongate-oval central muscle scars have been observed also in R. siliqua at each side of the anterior end of the dorsal median ridge (Havlicek 1994). Shell substance lamellar, dark grey, chitino-phosphatic; if partly exfoliated, the lamellae bear fine radial striation. Compari s on : Rafanoglossella is the most probable descendant of the Arenigian-Dobrotivian genus Rafanoglossa Havlicek as indicated by the presence of a strong median ridge in their brachial valves. Whereas Rafanoglossa has a well-developed, moderately elevated ventral pseudointerarea anteriorly bounded with prominent transverse edges (Havlicek 1982, pl. IX, figs. 9, 11), the Berounian to Kosovian genus Rafanoglossella has lost totally the ventral pseudointerarea, which was substituted by an internal area neither raised above the valve floor nor being separated from the inner valve surface by a transverse edge. The ventral internal area of Rafanoglossella is similar to that of the Upper Ordovician genus Anx Havlicek, which differs from the former genus in a total absence of the median ridge in the brachial valve. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Hendy et al. 2009, Nesnidal et al. 2013 | |||||
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Letna - Harnagian | Czechia | Lingula deleta (3861) | |
| Berounian - Harnagian | Czechia | Lingula deleta (173553) | |
| Berounian | Czechia | Lingula leiskowiensis (154463) |