PBDB Taxon

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

Bernicia praecursor

Gastropoda

Taxonomy

Bernicia praecursor was named by Cox (1927). Its type specimen is Geological Survey Museum, London, England, No. 38387, a shell, and it is a 3D body fossil. Its type locality is Boring at the Greenwich Hospital Estate, Scremerston, which is in a Brigantian lacustrine limestone in the Scremerston Coal Formation of the United Kingdom.

Year	Name and author
1927	Bernicia praecursor Cox pp. 327 - 328 fig. 1
1941	Bernicia praecursor Knight pp. 56 - 57 figs. Plate 96, figure 2

Reference	Diagnosis
L. R. Cox 1927	Diagnosis.—Shell small, ovate, naticiform, the height slightly in excess of the diameter; spire low, the body-whorl occupying sixsevenths of the total height of the shell; nucleus minute; whorls four, the early ones narrow, the penultimate relatively much wider; body-whorl very large, with a narrow, rounded shoulder becoming pronounced near the aperture, and with moderately convex flanks tending to be obscurely sub-angular at the periphery, which lies below the prolongation of the last suture; base imperforate; aperture sub-rectangular rather than ovate, not appreciably oblique, occupying slightly more than half the total height of the shell; outer lip sub-vertical and flattened-convex laterally, bent round posteriorly so as to be nearly horizontal where it meets the suture; columella slightly concave; surface of shell delicately ornamented with fine growth-threads, which are nearly vertical on the flanks of the whorls, but are bent forward in the immediate neighbourhood of the sutures so as to meet the latter at an angle of about 45 degrees.
J. B. Knight 1941	Small, globular, naticiform gastropods with very large body whorl, a short spire, and straight outer lip; whorl profile round, slightly shouldered below the sutures; sutures deep; body whorl occupying about 85 per cent o f the total height; base rounded, seemingly anomphalous; aperture roundly subquadrate; characters of inner lip obscured and not certainly known; outer lip nearly straight; nucleus simple, dextral; ornamentation very fine, sharp, transverse lirae. The holotype, a specimen of about 4\| whorls, is 2.9 mm. high and 2.5 mm. wide. The pleural angle is 74 degrees.