Original paper

On the stratigraphic range of Sublunuloceras Spath (Ammonoidea Jurassica)

Kanjilal, S.

Abstract

Sublunuloceras Spath has so far been considered to range from Middle Callovian to Lower Oxfordian. A well preserved specimen has now been recovered from the basal Katrol shale (Middle Kimmeridgian) which is a second example from this formation in Kutch (India) ignored by Spath (1927-33) and Arkell (1957).

Kurzfassung

Sublunuloceras schien bisher nur vom Mittleren Callovium bis in das Untere Oxfordium vorzukommen. Zwei Exemplare von S. discoides Spath aus dem Unteren Katrol-Schiefer erweitern die stratigraphische Reichweite der Gattung bis in das Mittlere Kimmeridgium.

Keywords

Perisphinctida (Sublunuloceras discoides) • Kimmeridgian (Middle-) • shale (Katrol-); Gujarat (Habo Hill/District Kutch)