Cassiopid gastropods from the cretaceous of Western Serbia

Abstract

Three species of Cassiopidae (Cerithioidea, Gastropoda) are described from outcrops in the vicinity of the villages Rastište and Mokra Gora in western Serbia. They occur in marly limestones of near shore shallow water deposits. Earlier micropaleontological investigations have indicated an Albian-Cenomanian age. The species encountered are related to those present in deposits of the European margin of the Tethys and closest relationships exist to those of the Armenian and Transcaucasian region. Our species can be placed in the genera Cassiope, Paraglauconia and Bicarinella. A new species Cassiope kotromanensis is erected. Assumptions about post-mortem shell transport and size sorting of gastropod shells were examined through statistical analysis

Deciphering the geodynamic evolution of the Dinaric orogen through the study of the ‘overstepping’ Cretaceous successions

“…and Brachidontes sasykensis Romanov, and the gastropods Bicarinella bicarinata (Pchelintsev) and Pseudonerinea sp. While Amphidonte and Gyrostrea are typical Cretaceous oyster genera, Brachidontes sasykensis has been reported from the Barremian of the Dniester-Prut region (Romanov, 1976) and Bicarinella bicarinata from the Albian-Cenomanian of Mokra Gora (Banjac et al 2007). A Late Jurassic age of subunit A3, as inferred by Bortolotti et al (1971), is no longer maintained according to our updated determinations.…”

“…The lower portion of the succession was measured at Vardište, a little village north of the railway station (section 1; 43°45 0 40.0″ N 19°27 0 29.1″ Esame outcrops studied by Bortolotti et al 1971) and in the vicinity of Kotroman village (section 2: 43°46 0 01.0″ N 19°28 0 07.2″ E; section 3: 43°46 0 05.0″ N 19°28 0 22.4″ E); the middle and upper portions of the succession were studied on the eastern flank of Tusto Brdo (section 4: 43°46 0 37.1″ N 19°28 0 36.2″ E) and on the southern slope of Ograđenica Hill (section 5: 43°46 0 59.9″ N 19°28 0 54.5″ E) and south of Kotroman village (section 2b: 43°46 0 06.6″ N 19°27 0 54.6″ E) ( lithostratigraphic studies were performed only on the Vardište section by Bortolotti et al (1971). Other studies focused on a general description of the main lithostratigraphic units and their respective biostratigraphic assemblages and gave no precise stratigraphic location for the samples collected and studied (Pejović & Radoičić, 1971;Banjac et al 2007Banjac et al , 2008Radoičić & Schlagintweit, 2007). As a consequence, in some cases it was impossible to make a reliable correlation of the biostratigraphic data, especially in the lower portion of the succession, as previous workers recognized the presence of only one deepening-shallowing cycle.…”

“…As a consequence, in some cases it was impossible to make a reliable correlation of the biostratigraphic data, especially in the lower portion of the succession, as previous workers recognized the presence of only one deepening-shallowing cycle. The majority of workers studied single outcrops located north of Kotroman (section 3; Banjac et al 2007) and north of Mokra Gora village (Pejović & Radoičić, 1971;Radoičić & Schlagintweit, 2007), which are representative of Unit B only.…”

“…Pejović & Radoičić (1971) and Radoičić (1984) placed the lower part of the Mokra Gora succession (Unit B) as older than Cenomanian, and indicated a late Turonian to latest Cretaceous age for the upper part represented by massive limestones with hippuritids and gastropods (Unit C). Banjac (1994aBanjac ( ,b, 2000 and Banjac et al (2007Banjac et al ( , 2008 described Albian-Cenomanian mollusc faunas from the lower part of the succession. The same age was confirmed by I. Dulić (unpub.…”

“…11). The age of these gastropod species is given as Albian-Cenomanian by Banjac et al (2007). The bivalves Brachidontes sasykensis and Eomiodon sp., already mentioned for subunit A3, also occur in the lower part of subunit B3 in addition to oysters (Flemingostreidae gen. et sp.…”