Brahmaites (Brahmaites) brahma Forbes 1846 from: Ward, P.D..Kennedy, W.J.. (1993): Maastrichtian Ammonites from the Biscay Region (France, Spain) . Memoir (The Paleontological Society), Journal of Paleontology34 (Supplement to Vol. 67)(5) p. 1-58
|Notice: This catalogue page may contain unedited data.
Species Brahmaites (Brahmaites) brahma Forbes 1846
|Diagnosis / Definition:
Ward & Kennedy (1993):
Largest Biscay specimen 43 mm diameter.
Coiling very involute, with U = 49 percent of diameter, of
moderate depth, umbilical wall slopes outwards, flanks and venter
broadly rounded, but original whorl section cannot be established.
Very distant straight prorsiradiate constrictions, ?three per
half whorl, associated with narrow collar ribs that efface on outer flank and bear umbilical bullae of variable strength. Estimated
five primary ribs between constrictions, weak on umbilical wall
but strengthening into small umbilical bullae, straight on inner
flank, declining and effacing on outer flank. Venter smooth, but
|Discussion / Comments:
Ward & Kennedy (1993):
Lectotype is BMNH C5 1029, designated by Kennedy,
1986a, p. 29, and the original of Forbes, 1846, Pl. 8, fig. 1a,
b. Paralectotype BMNH C5 1030 is the original of Forbes, 1846,
Pl.8, fig. 1c; unfigured paralectotypes are BMNH C5 103 1-5 1037,
all from the Valudavur Formation of Pondicherry, south India.
Although poor, the Biscay material matches well
with the beautifully preserved type material, examples of which
are illustrated for comparison in Figure 26.2-26.5. Brahmaites
kossmati Henderson and McNamara, 1985 (p. 68, Pl. 6, figs.
11-14, Pl. 7, fig. 1, text-figs. 9a, b, 10) is more evolute and
depressed than B. brahma, with more numerous and coarser
ribs. See Kennedy (1986a, p. 30) for further discussion of the
The Biscay examples come from near the middle
of Member I to the top of Member V (Hendaye). The species
is rare. It also occurs in the Maastrichtian of Pondicherry, south
India, the Silex de Mussidan at Mussidan, Dordogne, France,
and allied forms occur in the Maastrichtian of Madagascar.
Species Brahmaites (Brahmaites) brahma
|Ward & Kennedy (1993):
|Stratigraphy - relative ages:
|lower Maastrichtian - lower Maastrichtian: Ward & Kennedy (1993)
Report on the Cretaceous fossil invertebrates from southern India, collected by Mr. Kaye and Mr. Cunliffe . Transactions of the Geological Society of London Vol. 2(7) p. 97–174
Campanian and Maastrichtian ammonites from northern Aquitaine, France . Palaeontological Association of London Special Papers in Palaeontology Vol. 36 p. 145
Ward,P.D.. and Kennedy,W.J.. (1993):
Maastrichtian Ammonites from the Biscay Region (France, Spain) . Memoir (The Paleontological Society), Journal of Paleontology34 (Supplement to Vol. 67)(5) p. 1-58
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