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Kjaerina (Villasina) almadenensis

Strophomenata - Strophomenida - Rafinesquinidae

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).

Synonymy list
YearName and author
1995Hedstroemina almadenensis Villas pp. 81 - 82 figs. PI. 13, fig. 8-13
2016Kjaerina (Villasina) almadenensis Colmenar pp. 300 - 304 figs. 5, 6

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
—Lophophorata
—PanbrachiopodaCarlson and Cohen 2020
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyStrophomenoideaKing 1846
familyRafinesquinidaeSchuchert 1893
genusKjaerinaBancroft 1929
subgenusVillasina
speciesalmadenensis()

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.

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Diagnosis
ReferenceDiagnosis
E. Villas 1995Species 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 2016Species 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.