Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Lenticulina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Nodosariacea
Family:
Nodosariidae
Subfamily:
Nodosariinae
Formal Genus Name and Reference:
Lenticulina LAMARCK, 1804, *1085a, p. 186
Type Species:
Lenticulites rotulata LAMARCK, 1804; SD CHILDREN, 1823, *337, p. 153
Images
(Click to enlarge in a new window)
Fig. 406,1. *L. rotulata (LAMARCK), U.Cret.(Senon.), Fr.; 1a,b, side, face views, X30 (*2117). --Fig. 406,2. L. cultrata (DE MONTFORT), L. Plio., Italy; 2a,b, side, face views, X27 (*7). --Fig. 406,3. L. danvillensis (HOWE & WALLACE), U.Eoc.(Jackson.), USA(La.); 3a-c, opposite sides and face views, X 40 (*972). --Fig. 406,4. L. hempsteadensis (HARRIS & SUTHERLAND), Paleoc.(Midway.), USA(Ark.); 4a-c, opposite sides and face view of holotype, refigured, X 47 (*2117) . --Fig. 406,5. L. pinatensis (PEREBASKINE), U.Cret., Fr.; 5a,b, side, face views, X33 (*1444). --Fig. 406,6-8. L. punctata (RZEHAK), L.Tert., Aus.; 6a,b, side, face views; 7, side view; 8a,b, long. secs. in plane of coiling and perpendicular to this plane, showing radial laminated wall characteristic of Nodosariidae, but described by RZEHAK as characterizing Cristellariopsis; all X28 (*1605).
Synonyms
Lenticulites, Nautilus
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Trias.
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, planispiral or rarely slightly trochoid, lenticular, biumbonate, periphery angled or keeled; chambers increasing gradually in size, in general of greater breadth than height; sutures radial, straight or curved and depressed, flush or elevated; surface may be variously ornamented with thickened, elevated sutures, bosses or sutural nodes; aperture radial at peripheral angle. (Robulus is regarded as a synonym of Len/ieulina, as considerable gradation in length of the radial apertural slits may occur. Darbyella is merely an abnormal asym· metrical form of Lenticulina, and in large assemblages of any species of this genus random asymmetrical, twinned, or even partially uncoiled specimens may be obtained. Similarly Darbyellina is represented by an abnormal specimen showing both a slight asymmetrical development and a final chamber which fails to reach the earlier whorl, and thus appears to be uncoiling. These aberrant forms do not warrant distinct generic assignments.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Nodosariacea
Family:
Nodosariidae
Subfamily:
Nodosariinae
Formal Genus Name and Reference:
Lenticulina LAMARCK, 1804, *1085a, p. 186
Type Species:
Lenticulites rotulata LAMARCK, 1804; SD CHILDREN, 1823, *337, p. 153
Images
(Click to enlarge in a new window)
Fig. 406,1. *L. rotulata (LAMARCK), U.Cret.(Senon.), Fr.; 1a,b, side, face views, X30 (*2117). --Fig. 406,2. L. cultrata (DE MONTFORT), L. Plio., Italy; 2a,b, side, face views, X27 (*7). --Fig. 406,3. L. danvillensis (HOWE & WALLACE), U.Eoc.(Jackson.), USA(La.); 3a-c, opposite sides and face views, X 40 (*972). --Fig. 406,4. L. hempsteadensis (HARRIS & SUTHERLAND), Paleoc.(Midway.), USA(Ark.); 4a-c, opposite sides and face view of holotype, refigured, X 47 (*2117) . --Fig. 406,5. L. pinatensis (PEREBASKINE), U.Cret., Fr.; 5a,b, side, face views, X33 (*1444). --Fig. 406,6-8. L. punctata (RZEHAK), L.Tert., Aus.; 6a,b, side, face views; 7, side view; 8a,b, long. secs. in plane of coiling and perpendicular to this plane, showing radial laminated wall characteristic of Nodosariidae, but described by RZEHAK as characterizing Cristellariopsis; all X28 (*1605).
Synonyms
Lenticulites, Nautilus
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Trias.
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, planispiral or rarely slightly trochoid, lenticular, biumbonate, periphery angled or keeled; chambers increasing gradually in size, in general of greater breadth than height; sutures radial, straight or curved and depressed, flush or elevated; surface may be variously ornamented with thickened, elevated sutures, bosses or sutural nodes; aperture radial at peripheral angle. (Robulus is regarded as a synonym of Len/ieulina, as considerable gradation in length of the radial apertural slits may occur. Darbyella is merely an abnormal asym· metrical form of Lenticulina, and in large assemblages of any species of this genus random asymmetrical, twinned, or even partially uncoiled specimens may be obtained. Similarly Darbyellina is represented by an abnormal specimen showing both a slight asymmetrical development and a final chamber which fails to reach the earlier whorl, and thus appears to be uncoiling. These aberrant forms do not warrant distinct generic assignments.]