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Nuculana (Saccella) semibistriata

Bivalvia - Nuculanida - Nuculanidae

Synonymy list
YearName and author
1951Nuculana (Saccella) semibistriata Eames p. 325 figs. pl. 9, fig. 12

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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
familyNuculanidaeAdams and Adams 1858
genusNuculanaWoodring 1925
subgenusSaccella
speciessemibistriata

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
F. E. Eames 1951Shell oval, moderately distinctly rostrate posteriorly, gently inflated.
Umbos not prominent, submedian, situated slightly anterior to the median line at about
seven-seventeenths of the length. Antero-dorsal margin slightly convex, not very long,
gently descendent. Anterior end rounded. Ventral margin moderately strongly convex,
a little attenuated posteriorly. Posterior end rostrate, the rostrum short and rather bluntly
pointed. Postero-dorsal margin moderately long, slightly concave, gently descendent.
Lunule and escutcheon not seen. There is a vague indication of a slight, wide, radial
furrow from the umbonal region to the antero-ventral corner. Ornament consisting of
a very distinctive arrangement of concentric, incised lines. These are closely spaced on the
posterior and ventral portions of the shell, but alternate ones die out anteriorly and dorsally
from a line running approximately from the middle of the postero-dorsal margin to the
antero-ventral corner. The actual line of demarcation is not at all sharp. The incised
concentric lines are thus about twice as widely spaced on the antero-ventral portion of
the shell as on the postero-ventral portion; they are also about twice as widely spaced on
the umbonal region as on the antero-ventral margin. There are 13 or 14 incised lines in
2 mm. near the ventral margin, 5 in mm. in the umbonal region, and about 9 in $ mm.
at the anterior end.
Measurements
No measurements are available
Composition: aragonitef
Entire body: yesf
Adult length: 1.0 to < 10f
Adult width: 1.0 to < 10f
Adult height: 1.0 to < 10f
Thickness: thinf
Folds: nonef
Ribbing: minorf
Spines: nonef
Internal reinforcement: nonef
Ontogeny: accretionf
Environment: coastal, inner shelf, outer shelf, oceanicf
Locomotion: facultatively mobileg
Life habit: shallow infaunalg
Diet: deposit feederg
Vision: blindc
Created: 2009-09-09 13:24:17
Modified: 2009-10-11 13:02:28
Source: g = genus, f = family, c = class
References: Kiessling 2004, Sanchez Roig 1926, Aberhan et al. 2004

Age range: base of the Thanetian to the top of the Ypresian or 59.20000 to 47.80000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Thanetian - Ypresian59.2 - 47.8Pakistan (Baluchistan) Saccella semibistriata (101938)