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Kjaerina (Villasina) almadenensis
Taxonomy
Hedstroemina almadenensis was named by Villas (1995). Its type specimen is MPZ 11570, a shell, and it is a 3D body fossil. Its type locality is Al-1. Almaden, which is in a Berounian shoreface sandstone/shale in the Bancos Mixtos Formation of Spain.
It was recombined as Kjaerina (Villasina) almadenensis by Colmenar (2016).
It was recombined as Kjaerina (Villasina) almadenensis by Colmenar (2016).
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.
†Kjaerina (Villasina) almadenensis Villas 1995
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Villas 1995 | Species of Hedstroemina with multicostellate radial ornament, prominent rugae on posterolateral sides of disc, large chilidium higher than dorsal interarea, flabelliform deeply impressed ventral muscle field about one third as long as valve length, and strongly thickened cardinal process lobes. | |
| J. Colmenar 2016 | Species of Kjaerina (Villasina) with ventral valve disc moderately convex; trail inclined with respect to disc 110–120°. Dorsal valve disc concave; trail inclined with respect to disc about 120°. Radial ornament with 6–8 ribs per 2 mm at 10 mm anteromedially from umbo; prominent median riboccasionally present; regular and continuous development of rugae. Ventral muscle field well impressed, flabellate. Cardinal process lobes, triangular in young specimens and extremely engrossed in adult and gerontic ones; myophores with concave and striated posteroventral surface; notothyrial platform strong; median ridge wide and high; broad transmuscle septa longer than median ridge. |
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy 2009, Hendy et al. 2009, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||