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

Show authors, comments, and common names
unclassified
  -
Pseudophylloceras kudernatschi
Bivalvia
 Arcida - Parallelodontidae
Parallelodon apenninicus n. sp., Parallelodon carsulanus n. sp., Parallelodon maxiai n. sp., "Parallelodon caterinae" = Catella caterinae
Parallelodon apenninicus n. sp. Conti and Monari 1986 clam
Holotype
Parallelodon carsulanus n. sp. Conti and Monari 1986 clam
Holotype
Parallelodon maxiai n. sp. Conti and Monari 1986 clam
holotype- location
"Parallelodon caterinae" = Catella caterinae Parona 1894 clam
Cephalopoda
 Ammonitida - Lytoceratidae
Nannolytoceras polyhelictum, Nannolytoceras pygmaeum
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
Tmetoceras regleyi
 Phylloceratida - Phylloceratidae
Ptychophylloceras longa, Ptychophylloceras rosiwali, Calliphylloceras disputabile
Calliphylloceras disputabile Zittel 1869 ammonite
Gastropoda
 Neritoidea - Neridomidae
"Neritoma (Neridomus) paronai" = Neridomus, "Neritoma (Neridomus) riettii n. sp." = Neridomus
"Neritoma (Neridomus) paronai" = Neridomus snail
"Neritoma (Neridomus) riettii n. sp." = Neridomus snail
Holotype
 Sorbeoconcha - Rissoidae
Zebinostoma nicolisi, Zebinostoma cf. turrita, Zebinostoma sp.
Zebinostoma sp. Conti and Fischer 1983 snail
 Sorbeoconcha - Aporrhaidae
Pietteia trispinigera
Pietteia trispinigera Szabo 1983 snail
 Neritoina - Neritopsidae
Neritopsis (Neritopsis) spinigera
 Neritoina - Delphinulopsidae
"Naticopsis (Marmolatella) esui n. sp." = Marmolatella
"Naticopsis (Marmolatella) esui n. sp." = Marmolatella snail
holotype- location
 Murchisoniina - Zygopleuridae
Allocosmia geometrica n. sp.
Allocosmia geometrica n. sp. snail
Holotype
 Vetigastropoda - Discohelicidae
Discohelix cooki
 Vetigastropoda - Cirridae
Lepidotrochus sp.
 Trochoidea - Ataphridae
Zircia zircensis
Zircia zircensis Szabo 1981 snail
 Trochoidea - Colloniidae
Crossostoma macerinoi n. sp., Planicollonia macrostoma n. sp., "Paleocollonia angeli" = Palaeocollonia
Crossostoma macerinoi n. sp. snail
Holotype
Planicollonia macrostoma n. sp. snail
holotype- location
"Paleocollonia angeli" = Palaeocollonia snail
 Trochoidea - Turbinidae
Fischeriella umbra n. sp., Odoardia prosornata n. sp.
Fischeriella umbra n. sp. snail
Holotype
Odoardia prosornata n. sp. snail
Holotype
 Turbinoidea - Proconulidae
Muricotrochus subluciensis, Proconulus (Laeviconulus) keratomorphus n. sp.
Muricotrochus subluciensis Hudleston 1894 snail