These specimens probably belong to the genus Tornatellaea Conrad (1860)

Diagnosis (by Kaim, 2004): Protoconch strongly medioaxial to almost coaxial, smooth. Subovate shell, spire generally less than half total shell height. Suture impressed to channeled. Sculpture consisting of pitted spiral furrows, narrower than interspaces. Shape of pits hexagonal. Aperture posteriorly narrowed, roundly sub− marginate anteriorly. Outer lip thickened and crenulate or lirate within. Inner lip callused over columellar surface, bearing two oblique, sharp folds (modified after Sohl 1964; and Gründel 1997b).

Diagnosis (by Gründel & Nützel, 2012): The shell is relatively high spired. The protoconch (not known from type species) is medioaxial to almost

coaxial, consisting of one to two visible whorls. The teleoconch whorls have or have not a narrow subsutural ramp. The ornament consists of spiral furrows with variable number and spacing. The intersection of growth lines and furrows produce oval pits in the furrows. The growth lines are almost straight, orthocline on whorl flanks, not or only weakly backward curving adapically. They are weakly

prosocyrt on the base. The aperture is oval. The outer lip is convex and has an inner thickening or dentations (not seen in Jurassic species). The inner lip bears two distinct columellar folds.

Are you sure they are Cretaceous in age? They look more like Cenozoic marginellids to me. Specimen AB appears to have color stripes preserved, which is also unusual for Cretaceous gastropods. Of similar habitus is Mataxa elegans from the Ripley Fm (Sohl 1960, pl 45, figs. 20-27) - similar sculpture and denticles on inside of outer lip. But that species certainly has a much larger aperture. I'd strongly recommend checking the stratigraphy again.

Dear Dr. Kiel

Thank you for your suggestion. Yes, AB consists of colous bandings. But the stratigrphic information is absolutely correct. More precisely they are from Latest Maastrichtian age.

Dear Mariel

Thanks a lot for your concern. But these specimens do not contain any beaded / pitted ornamentation.

Sorry Mariel, but they are not Tornatellaea,..

nor Marginellids... The specimen C shows denticles on inside of outer lip ... it's more certainly about Buccinidae ...

Dear Sumanta,

Jean-Michel is most probably correct. The shells are most probably Buccinidae. Here some suggestions for literature:

Blanford, W.T. (1876): On the Geology of Sindh. – Records of the Geological Survey of India, 9 (1): 8-22.

Blanford, W.T. (1879): The Geology of Western Sindh. – Memoirs of the Geological Survey of India, 17 (1): 1-210.

Carter, H.J. (1854): Summary of the Geology of India between the Ganges, the Indus, and Cape Comorin. – Journal of the Bombay Branch of the Royal Asiatic Society, 5: 1-157, pls. 1-4, tabs.

Cossmann, M. & Pissarro, G. (1909): The Mollusca of the Ranikot Series. 1. Cephalopoda and Gastropoda. – Memoirs of the Geological Survey of India, Palaeontologia Indica (n. s.), 2 (3): 1-84.

Cox, L.R. (1930): Mollusks of the Hangu Shales. - In: Davies, L.M., Currie, E. & Gregory, A.O. (1930): The fossil fauna of the Samana Range and some neighbouring areas. Parts I-VIII. – Paleontological Survey of India (n. s.), 15: 222 pp., 23 pls.

Duncan, P.M. (1880): Monograph on the fossil corals of the South Indian Islands. – Memoirs of the Geological Survey of India, Palaeontologia Indica (n. s.), 14 (1/2):

Fedden, F. (1879): Geology Western Sind. – Memoirs of the Geological Survey of India, 17 (1):

Forbes, E. (1846): Report on the fossil Invertebrata from southern India, collected by Mr. Kaye and Mr. Cunliffe. – Transactions of the Geological Society of London (2nd ser.), 7: 97-174, pls. 7-19.

Kossmat, F. (1897): The Cretaceous deposits of Pondicherry. – Records of the Geological Survey of India, 30 (2): 51-111, pls. 6-10.

Krishkan, M.S. (1943): The Geology of India and Burma. –

Medlicott, H.B. & Blanford, W.T. (1879): Manual on the geology of India, II: Extra-Peninsula India. – Calcutta

Nath, R. & Chiplonker, G.W. (1938): Paleontological study of gastropods from Laki Bagatora, Sind. – Proceedings of the Indian Academy of Science, section B6:

Spengler, E. (1923): Contributions to the paleontology of Assam. – Memoirs of the Geological Survey of India, Palaeontologica Indica (n. s.), 8 (1): iii + 1-80, pls. 1-4.

Stoliczka, F. (1867-1868): The Gastropoda of the Cretaceous Rocks of southern India. – Memoirs of the Geological Survey of India, Palaeontologica Indica (n. s.), 5 (2): 1-498, 1-28 pls.

Vredenburg, E. (1901): Geological Sketch of the Beluchistan Desert. – Memoirs of the Geological Survey of India, 31 (2)

Vredenburg, E. (1908): The Cretaceous Orbitoides of India. – Records of the Geological Survey of India, 36 (3): 171-213, text figs. 1-5, pls. 25-28.

Ciao, Dirk

Dear Sumanta,

Probably, I did not pay enough attention about the ornamentation and aperture from the pictures. I think that the suggestions of Kiel, Pacaud and Fehse are more appropiated

regards

Mariel

We need more closely focused images of the aperture and apex. Also, the apertures need better cleaning. I, too, find it unlikely that these are latest Maastrichtian in age. If they are then that in itself is very interesting. I agree with previous comments that these shells belong to the Family Buccinidae (sensu lato) or to similar Buccinoidea clades.

I agree too with the idea of Buccinoidea. In particular A  and B remember me a species of the genus Pisania. If so, your specimen should have a stronger denticle between the top of external lip and the columellar top zone. The second specimen is not clear, since details are not visible from pictures. It could be a Columbellidae.

Good luck,

Danilo

It is especially necessary of better photo (lighting)

ciao

Jean-Michel

I think this species is a Nassariidae very similar at the actual Bullia indusindica Melvill, 1898.

No, the shell of Sumanta does not show the characters of Nassariidae (siphonal fasciol in the neck) ... it is much rather Buccinidae or even Columbellidae ...

A& B seems to be Nassarius from  the family Nassariidae .

B&C seems to be Mitrella frome the family Columbellidae .

It is especially necessary of better photo ...