PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Nucula (Lamellinucula) pakistanica

Bivalvia - Nuculida - Nuculidae

Taxonomy

Nucula (Lamellinucula) pakistanica was named by Eames (1951). Its type specimen is L. 79793, a shell, and it is not a trace fossil. Its type locality is Fossil Bed F.2680, Zinda Pir, which is in a Ypresian marine shale in the Ghazij Formation of Pakistan.

Sister species lacking formal opinion data

N. angusta, N. calliope, N. cipleyensis, N. ciplyensis, N. cochlear, N. dasa, N. defuniak, N. dixoni, N. fritschi, N. guillermensis, N. indica, N. meadinga, N. microconcentrica, N. otamatea, N. percrassa, N. potomacensis, N. praelongata, N. pulchra, N. rivulana, N. sagittata, N. stachei, N. subtrigona, N. silicea, N. mametschinskensis, N. planata, N. aptera, N. waiaotea, N. waiotea, N. eudorae

Synonymy list

Year	Name and author
1951	Nucula (Lamellinucula) pakistanica Eames p. 316 figs. pl. 9, figs. 2a, b

Is something missing? Join the Paleobiology Database and enter the data

Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
—	Eubivalvia

Rank	Name	Author
subclass	Protobranchia	(Pelseneer 1889)
superorder	Nuculiformii	Dall 1889
order	Nuculida	(Dall 1889)
superfamily	Nuculoidea	(Gray 1824)
family	Nuculidae	Gray 1824
genus	Nucula	Lamarck 1799
subgenus	Lamellinucula	(Schenck 1944)
species	pakistanica

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.

†Nucula (Lamellinucula) pakistanica Eames 1951

show all | hide all

Diagnosis

Reference	Diagnosis
F. E. Eames 1951	DESCRIPTION.Small, obliquely subtriangular in outline, moderately strongly inflated, especially umbonally. Prodissoconch small, apparently smooth. Umbos rather high, moderately pointed, situated posterior to the median line at about five-sixths of the length. Antero-dorsal margin rather long, straight or very slightly convex, moderately steeply descendent. Anterior end narrowly rounded. Ventral margin moderately convex. Posterior end broadly rounded. Postero-dorsal margin slightly convex, steeply descendent. Shell ornamented with fine, sharp, distinct, concentric threads which are, at most, only one-half the width of their intervals and are minutely frilled. There are 19 or 20 such threads on the holotype, spaced about 11 to the mm. ventrally. Valve margins finely crenulated ventrally. Lunule and escutcheon not well preserved. Lunule apparently not very elongate, only slightly sunk, smooth. Escutcheon cordiform, wide, not sunk. Compression tends to make young specimens less inflated, and weathering makes the concentric threads appear finer and more widely spaced.