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Pseudarca incola

Bivalvia - Pseudarcidae

Taxonomy
Leda incola was named by Barrande (1881) [= 1934 Pseudocyrtodonta ala Barr. – Pfab, p. 237, pl. III (IV), fig. 13 according to Steinová 2012.]. It 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 Pseudocyrtodonta incola by Steinová (2012); it was recombined as Pseudarca incola by Polechová (2022).

Synonymy list
YearName and author
1881Leda incola Barrande figs. pl. 270, figs III/1–4
2012Pseudocyrtodonta incola Steinová pp. 338 - 342 fig. 4
2022Pseudarca incola Polechová pp. 60 - 51 figs. 2(D–G, I, J)

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
—Eubivalvia
RankNameAuthor
subclassAutobranchia(Groblen 1894)
infraclassHeteroconchia(Gray 1854)
—UniomorphiGray 1854
—UnioniGray 1854
superfamilyLyrodesmatoideaUlrich 1894
familyPseudarcidaeScarlato and Starobogatov 1979
genusPseudarcaTromelin and Lebesconte 1875
speciesincola()

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.

†Pseudarca incola Barrande 1881
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Diagnosis
ReferenceDiagnosis
M. Steinová 2012Pseudocyrtodonta with longitudinally elongated shell, with rostrate posterior part and with more pronounced umbos.

Shell small (length maximally 9 mm, height maximally 5 mm and width maximally 3.2 mm), equivalve, inequilateral and longitudinally elongated, with rostrate posterior part. More pronounced, strongly prosogyrate umbos situated in the anterior part of the shell. Anterior margin of the shell rounded, posterior margin rostrate, ventral margin convex. Hinge actinodont, in the anterior part 3–6 pseudocardinal (pseudotaxodont) teeth (Fig. 4C, H, K), lying under hinge line. After Babin (1966) anterior teeth can be classified as convexodont. In the posterior part of the shell one straight, slender pseudolateral tooth (Fig. 4G). Anterior adductor muscle scar is almost elliptic, more deeply impressed than elliptic posterior adductor muscle scar. Rounded pedal muscle scar in anterior part, joins with adductor muscle scar (Fig. 4K, P). Elongated pedal muscle scar in posterior part, separated from adductor muscle scar (Fig. 4K). In the umbo region of the lectotype two accessory narrow elliptic muscle scars (Fig. 4A) are developed. Inner surface sculpture is smooth. Shell thickness and outer surface sculpture unknown.
Measurements
No measurements are available
Composition: aragonitec
Locomotion: facultatively mobilec
Life habit: infaunalc
Diet: suspension feederc
Vision: blindc
Created: 2004-02-28 11:33:36
Modified: 2010-02-12 03:59:35
Source: c = class
Reference: Aberhan et al. 2004

Age range: base of the Sarka to the top of the Kralodvorian or 466.00000 to 445.20000 Ma

Collections (9 total)


Time interval Ma Country or state Original ID and collection number
Sarka466.0 - 466.0Czech Republic Pseudocyrtodonta incola (95015 95017)
Sarka466.0 - 466.0Czech Republic (Plzeňský) Leda incola (type locality: 95016)
Sarka466.0 - 466.0Czech Republic (Cvikov) Pseudocyrtodonta incola (167385)
Berounian - Harnagian457.9 - 457.2Czech Republic Pseudarca incola (155058 233135)
Berounian457.9 - 449.8Czech Republic (Prague) Pseudarca incola (233137)
Berounian457.9 - 449.8Czech Republic Pseudarca incola (154463)
Kralodvorian449.8 - 445.2Czech Republic Pseudarca incola (165097)