Bivio Macerino (dike A) (Jurassic of Italy)

Where: Central Italy , Italy (42.7° N, 12.6° E: paleocoordinates 29.9° N, 19.1° E)

• coordinate estimated from map

When: Ludwigia murchisonae ammonoid zone, Middle Aalenian (175.6 - 171.6 Ma)

• Was Aalenian - Bajocian, but Ludwigia murchisonae zone is lower-middle Aalenian

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, brown carbonate and lithified, fine-grained, flat-pebble, red carbonate

• "A" dike infilling is made of light brown micrite that encloses centimetric angular pebbles of reddish laminated micrites similar to the above mentioned sediments, ascribed with some doubts to the Bajocian. A deeply bioeroded surface, covered by sedentarid worm tubes, cuts the gastropod bearing infilling.

Size class: macrofossils

Collection methods: mechanical, peel or thin section,

Primary reference: M. A. Conti, S. Monari, and G. Pallini. 1986. A middle Jurassic bivalve and gastropod fauna from Umbria (Central Italy). Geologica Romana 23:175-215 [M. Aberhan/D. Wellmanns/S. Nurnberg]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123679: authorized by Martin Aberhan, entered by Daniel Wellmanns on 27.01.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Arcida - Parallelodontidae
Parallelodon apenninicus n. sp. Conti and Monari 1986 clam
Parallelodon carsulanus n. sp. Conti and Monari 1986 clam
Parallelodon maxiai n. sp. Conti and Monari 1986 clam
holotype- location
"Parallelodon caterinae" = Catella caterinae Parona 1894 clam
 Ammonitida - Lytoceratidae
Nannolytoceras polyhelictum Böckh 1881 ammonite
Nannolytoceras pygmaeum d'Orbigny 1846 ammonite
 Ammonitida - Hammatoceratidae
"Hammatoceras pugnax" = Spinammatoceras pugnax, "Abbasites modestus" = Abbasitoides modestus, Hammatoceras leptoplocum
"Hammatoceras pugnax" = Spinammatoceras pugnax Vacek 1886 ammonite
"Abbasites modestus" = Abbasitoides modestus Vacek 1886 ammonite
 Ammonitida - Hildoceratidae
 Phylloceratida - Phylloceratidae
 Neritoidea - Neridomidae
"Neritoma (Neridomus) paronai" = Neridomus, "Neritoma (Neridomus) riettii n. sp." = Neridomus
"Neritoma (Neridomus) paronai" = Neridomus snail
"Neritoma (Neridomus) riettii n. sp." = Neridomus snail
 Sorbeoconcha - Rissoidae
Zebinostoma sp. Conti and Fischer 1983 snail
 Sorbeoconcha - Aporrhaidae
Pietteia trispinigera Szabo 1983 snail
 Neritoina - Neritopsidae
 Neritoina - Delphinulopsidae
"Naticopsis (Marmolatella) esui n. sp." = Marmolatella
"Naticopsis (Marmolatella) esui n. sp." = Marmolatella snail
holotype- location
 Murchisoniina - Zygopleuridae
Allocosmia geometrica n. sp. snail
 Vetigastropoda - Discohelicidae
 Vetigastropoda - Cirridae
 Trochoidea - Ataphridae
Zircia zircensis Szabo 1981 snail
 Trochoidea - Colloniidae
Crossostoma macerinoi n. sp., Planicollonia macrostoma n. sp., "Paleocollonia angeli" = Palaeocollonia
Crossostoma macerinoi n. sp. snail
Planicollonia macrostoma n. sp. snail
holotype- location
"Paleocollonia angeli" = Palaeocollonia snail
 Trochoidea - Turbinidae
Fischeriella umbra n. sp. snail
Odoardia prosornata n. sp. snail
 Turbinoidea - Proconulidae
Muricotrochus subluciensis Hudleston 1894 snail