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Praenucula applanans

Bivalvia - Nuculida - Praenuculidae

Taxonomy
Nucula applanans was named by Barrande (1881). Its type specimen is NM L 27163 (Internal mould of the shell with conjoined valves) and is a 3D body fossil. Its type locality is Osek, which is in a Sarka offshore shale in the Sarka Formation of the Czech Republic.

It was recombined as Ctenodonta applanans by Pfab (1934); it was recombined as Praenucula applanans by Polechová (2013).

Sister species lacking formal opinion data
P. dispersa, P. infirma, P. praetermissa

Synonyms
  • Praenucula sharpei was named by Babin and Gutiérrez-Marco (1991) [= 1984b Deceptrix n. sp. Martin in Gutierrez-Marco et al., p. 302.]. Its type specimen is RA-I 2148jOR., a shell (Internal mould of a right valve showing the dentition), and it is a 3D body fossil. Its type locality is Cacemia beds, Navalpino, which is in an Oretanian transition zone/lower shoreface shale in the Navatrasierra Shale Formation of Spain.

    It was synonymized subjectively with Praenucula applanans by Polechová (2013).
Synonymy list
YearName and author
1881Nucula applanans Barrande figs. pl. 272 f. III/1–12.
1934Ctenodonta applanans Pfab p. 222 figs. pl. 2 (3) f. 1–3
1991Praenucula sharpei Babin and Gutiérrez-Marco pp. 115 - 116 figs. pl. 2 f. 1–6
2013Praenucula applanans Polechová pp. 433 - 436 figs. 4A–R, 5C

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
RankNameAuthor
—Eubivalvia
subclassProtobranchia(Pelseneer 1889)
superorderNuculiformiiDall 1889
orderNuculida(Dall 1889)
superfamilyNuculoidea(Gray 1824)
familyPraenuculidaeMcAlester 1968
genusPraenuculaPfab 1934
speciesapplanans()

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.

†Praenucula applanans Barrande 1881
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Invalid names: Praenucula sharpei Babin and Gutiérrez-Marco 1991 [synonym]
Diagnosis
ReferenceDiagnosis
C Babin and J C Gutiérrez-Marco 1991 (Praenucula sharpei)Small species of Praenucula, convex and high, with few teeth distributed almost equally between the two parts of the hinge plate. Adductor muscle scars not very extended and badly impressed.
M. Polechová 2013Praenucula with slightly larger posterior part of the shell, umbo almost in the middle of the shell, slightly prosogyrate, orthomorphodont teeth in the posterior part.