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Polidevcia stevensiana

Bivalvia - Nuculanida - Polidevciidae

Taxonomy
Leda stevensiana was named by Girty (1910). Its type specimen is USNM 155906, a shell, and it is a 3D body fossil.

It was recombined as Phestia stevensiana by Pojeta (1969); it was recombined as Polidevcia stevensiana by Hoare (1993) and Hoare (2007).

Sister species lacking formal opinion data
P. acuta, P. insolita, P. vaseyana

Synonymy list
YearName and author
1910Leda stevensiana Girty p. 226
1969Phestia stevensiana Pojeta p. 19 figs. pl. 3 f. 24-29
1993Polidevcia stevensiana Hoare p. 378 figs. 2.21 – 2.28
2007Polidevcia stevensiana Hoare p. 65 figs. 3.10 – 3.14

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
—Eubivalvia
RankNameAuthor
subclassProtobranchia(Pelseneer 1889)
superorderNuculaniformiiCarter et al. 2000
orderNuculanida(Carter et al. 2000)
superfamilyNuculanoideaAdams and Adams 1858
familyPolidevciidaeKumpera 1960
subfamilyPolidevciinaeKumpera et al. 1960
genusPolidevcia(Tschernyschev 1943)
speciesstevensiana()

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.

†Polidevcia stevensiana Girty 1910
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Diagnosis
ReferenceDiagnosis
R. D. Hoare 1993Polidevcia with elongate, nuculaniform shape; beaks strongly incurved low, opisthogyrate, located about onethird length from anterior margin; posterior margin broadly rostrate; escutcheon distinct; lunule small, narrow, indistinct; surface ornamented with numerous fine, comarginal filae (5-6 per mm); hinge structure of eight chevron-shaped teeth anterior to beak and nine posterior to beak; resilifer not seen; large, suboval, posterior adductor scar located on umbonal shoulder just posterior to dentition; suboval, anterior adductor scar not deeply impressed, located near anterodorsal margin; small, oval, dorsomedian scar located on umbo; shallow to deep arcuate groove extends posteroventrally from umbo in internal molds.
Measurements
No measurements are available
Composition: aragonitec
Locomotion: facultatively mobilesuperf
Life habit: infaunalsuperf
Diet: deposit feedersuperf
Vision: blindc
Created: 2009-09-09 13:26:01
Modified: 2009-09-09 15:26:01
Source: superf = superfamily, c = class
References: Aberhan et al. 2004, Sanchez Roig 1926

Age range: base of the Meramecian to the top of the Serpukhovian or 343.00000 to 323.20000 Ma

Collections (8 total)


Time interval Ma Country or state Original ID and collection number
Meramecian343.0 - 335.5USA (Arkansas) Phestia stevensiana (67201)
Chesterian - Brigantian335.5 - 330.9USA (Ohio) Polidevcia stevensiana (85363 85364)
Chesterian335.5 - 323.2USA (Arkansas) Phestia stevensiana (76144)
Serpukhovian330.9 - 323.2USA (West Virginia) Polidevcia stevensiana (56128 56142 56143 65682)