U.S. Geological Survey Professional Paper, Issue 142U.S. Government Printing Office, 1947 - Geology |
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Page 11
... elevated . Leda proteracuta Gardner , n . sp . , s . 1 . Between 20 and 25 concentric ridges , most prominent ... elevated . Escutcheon narrow , lanceolate , concave , unequally divided by a sharply elevated line that cuts off an ...
... elevated . Leda proteracuta Gardner , n . sp . , s . 1 . Between 20 and 25 concentric ridges , most prominent ... elevated . Escutcheon narrow , lanceolate , concave , unequally divided by a sharply elevated line that cuts off an ...
Page 15
... elevated in the medial portion of each series ; anterior series including approximately 18 teeth , the posterior 11 or 12 - the larger number in the anterior series due to the larger number of fine , crowded , subumbonal teeth . Inner ...
... elevated in the medial portion of each series ; anterior series including approximately 18 teeth , the posterior 11 or 12 - the larger number in the anterior series due to the larger number of fine , crowded , subumbonal teeth . Inner ...
Page 17
... elevated , acute , somewhat A - shaped , the angle directed toward the umbones , 10 or 11 in the posterior series , 12 or 13 in the anterior . Anterior adductor scar moderately large , irregular in outline , placed at the distal ...
... elevated , acute , somewhat A - shaped , the angle directed toward the umbones , 10 or 11 in the posterior series , 12 or 13 in the anterior . Anterior adductor scar moderately large , irregular in outline , placed at the distal ...
Page 18
... elevated , the hinge margin also slightly raised . Concentric sculpture quite sharp and regular upon the escutcheon but more or less obsolete upon the lunule . Anterior dorsal margin not far from horizontal , merging Type : U. S. Nat ...
... elevated , the hinge margin also slightly raised . Concentric sculpture quite sharp and regular upon the escutcheon but more or less obsolete upon the lunule . Anterior dorsal margin not far from horizontal , merging Type : U. S. Nat ...
Page 19
... elevated or obtusely flattened concentric ridges , numbering about 40 to 45. Rostrum smooth , the unsculptured area becom- ing increasingly narrow toward the umbones . Sculp- ture less elevated upon the anterior portion of the shell ...
... elevated or obtusely flattened concentric ridges , numbering about 40 to 45. Rostrum smooth , the unsculptured area becom- ing increasingly narrow toward the umbones . Sculp- ture less elevated upon the anterior portion of the shell ...
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Common terms and phrases
acute adult altitude angulated anteriorly Apertural view arcuate axial sculpture Baileys Ferry base body whorl Calhoun County canal cardinal Chipola formation Chipola River chipolana conch Conrad constricted costals Dall denticles Dimensions dorsal margin elevated fauna feebly FIGURE flattened front Gardner genus grooves height hinge holotype incremental Inner margin labrum later whorls latitude left valve less Liberty County ligament lirae lirate lunule Maury maximum diameter mile below Baileys millimeters Miocene moderately narrow Oak Grove Oak Grove sand obliquely obscure obtuse Occurrence Okaloosa County Outer lip outline pallial line paratype penult periphery pillar Plate posterior fasciole posterior margin posteriorly prominent protoconch radial ribs right valve sharply Shell Bluff Shell small Shoal River formation sinus slender slightly smooth specimens spiral sculpture spire striated subsp suture Trans Type locality U. S. Nat umbones valve cotype varix view of holotype volutions Wagner Free Inst Walton County