Sidi Abderrahmane Layer J (Pleistocene of Morocco)

Where: Morocco (32.3° N, 9.3° W: paleocoordinates 32.3° N, 9.2° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Middle Pleistocene (0.8 - 0.1 Ma)

• layer J; Tyrrhenian

•It seems from Texier et al., 2002 (Quaternaire vol. 13) that this level was subsequently destroyed by continued quarry excavation. My interpretation from this publication and Roberts et al. 2006 (in Quat. Science Reviews) is that layer J is around or older than 500,000 yrs old. Occhietti et al (2002; Quaternaire) performed amino acid racemization on Patella from museum collections of layer J, and while these analyses yielded very low concentrations, they suggest this layer is Stage 15. Stearns (1978; GSA Bulletin) correlates to Stage 17.

• bed-level stratigraphic resolution

Environment/lithology: coastal; grainstone

• From Stearns (1978; GSA Bulletin): calcarenite and coquina

Size class: macrofossils

Primary reference: G. Lecointre. 1952. Recherches sur le Neogene et le Quaternaire marins de la cote Atlantique du Maroc. Publications du Service geologique du Maroc 99(1,2):1-174 [J. Sessa/J. Sessa/S. Ávila]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 127581: authorized by Jocelyn Sessa, entered by Jocelyn Sessa on 18.05.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Cephalopoda
 Spirulida - Spirulidae
Spirula spirula ram's horn shell
Gastropoda
 Trochoidea - Phasianellidae
 Trochoidea - Trochidae
"Solarium fallaciosum" = Trochus (Solarium) top snail
 Lepetellida - Fissurellidae
"Fissurella gibberula" = Diodora gibberula Lamarck 1822 snail
 Epitonioidea - Epitoniidae
"Scala communis" = Epitonium (Scala), "Scala crenata" = Epitonium (Scala)
"Scala communis" = Epitonium (Scala) wentletrap
"Scala crenata" = Epitonium (Scala) wentletrap
 Neotaenioglossa - Calyptraeidae
"Calyptra (Trochatella) trochiformis" = Calyptraea (Trochita) trochiformis, Crepidula sulin
"Calyptra (Trochatella) trochiformis" = Calyptraea (Trochita) trochiformis Gmelin 1791 slipper shell
Crepidula sulin slipper shell
 Cerithioidea - Cerithiidae
Bittium latreillei cerith snail
Bittium reticulatum da Costa 1778 cerith snail
 Cerithioidea - Planaxidae
Fossarus ambiguus Linnaeus 1758 snail
 Cerithioidea - Turritellidae
Turritella decipiens, Turritella communis, "Turritella (Haustator) triplicata" = Haustator
Turritella communis Risso 1826 turret shell
"Turritella (Haustator) triplicata" = Haustator turret shell
 Sorbeoconcha - Aporrhaidae
Aporrhais sp. da Costa 1778 snail
 Neogastropoda - Buccinidae
Nassa reticulata true whelk
Nassa vaucheri true whelk
subspecies "N. vaucheri var. min"
Nassa ferussaci true whelk
Nassa pygmea true whelk
Chauvetia candida true whelk
 Neogastropoda - Nassariidae
"Nassa incrassata" = Nassarius incrassatus, "Nassa (Arcularia) gibbosula" = Nassarius (Arcularia), "Nassa (Arcularia) circumcincta" = Nassarius (Arcularia), "Nassa (Arcularia) granum" = Nassarius (Arcularia), Fusus sp.
"Nassa incrassata" = Nassarius incrassatus Müller 1773 snail
subspecies "N. incrassata var. senegalensis"
"Nassa (Arcularia) gibbosula" = Nassarius (Arcularia) snail
"Nassa (Arcularia) circumcincta" = Nassarius (Arcularia) snail
"Nassa (Arcularia) granum" = Nassarius (Arcularia) snail
Fusus sp. Bruguière 1789 snail
 Neogastropoda - Columbellidae
"Columbella (Mitrella) gervillei" = Mitrella
"Columbella (Mitrella) gervillei" = Mitrella snail
 Neogastropoda - Mangeliidae
Mangelia nebula Montagu 1803 snail
 Neogastropoda - Marginellidae
Marginella oryza margin shell
Marginella epigrus margin shell
Marginella carneola margin shell
 Neogastropoda - Muricidae
"Purpura lapillus" = Nucella lapillus Linnaeus 1758 murex snail
"Purpura (Acanthina) crassilabrum" = Crassilabrum crassilabrum Sowerby 1834 murex snail
subspecies "P. (Acanthina) crassilabrum var. costata"
 Sorbeoconcha - Ranellidae
"Cymatium cutaceum" = Linatella caudata Gmelin 1791 triton shell
Cymatium nodiferum triton shell
Cymatium corrugatim triton shell
 Sorbeoconcha - Triviidae
"Trivia europaea" = Trivia (Trivia) europaea
"Trivia europaea" = Trivia (Trivia) europaea Montfort 1808 snail
 Sorbeoconcha - Littorinidae
Littorina saxatilis Olivi 1792 periwinkle
subspecies "L. saxatilis var. rudissima"
Littorina obtusata Linnaeus 1758 periwinkle
subspecies "L. obtusata littoralis"
Littorina (Melaraphe) neritoides Linnaeus 1758 periwinkle
 Sorbeoconcha - Naticidae
Natica marochiensis Gmelin 1791 moon snail
 Sorbeoconcha - Rissoidae
"Rissoa (Alvania) lineata" = Alvania, Rissoa (Alvania) cancellata
"Rissoa (Alvania) lineata" = Alvania snail
Rissoa (Alvania) cancellata da Costa 1778 snail
 Sorbeoconcha - Vermetidae
 Sorbeoconcha - Triphoridae
Triphora perversa Linnaeus 1758 snail
 Heterostropha - Pyramidellidae
 Heterostropha - Ellobiidae
"Melampus pyramidalis" = Ellobium pyramidale
"Melampus pyramidalis" = Ellobium pyramidale Sowerby 1822 snail
 Patellogastropoda - Patellidae
Patella vulgata Linnaeus 1758 limpet
Patella intermedia Murray 1857 limpet
Bivalvia
 Arcida - Arcidae
Arca (Fossularca) lactea Linnaeus 1767 ark
 Arcida - Cucullaeidae
"Arca tetragona" = Tetrarca tetragona
"Arca tetragona" = Tetrarca tetragona Poli 1795 clam
 Arcida - Glycymerididae
"Pectunculus glycimeris" = Glycymeris
"Pectunculus glycimeris" = Glycymeris clam
 Pectinida - Limidae
Lima subauriculata Montagu 1808 file clam
 Pectinida - Pectinoidae
"Chlamys varia" = Chlamys (Chlamys) varia Linnaeus 1758 scallop
 Mytilida - Mytilidae
Mytilus edulis Linnaeus 1758 mussel
Mytilus galloprovincialis Lamarck 1819 mussel
 Cardiida - Cardiidae
"Cardium (Laevicardium) norvegium" = Laevicardium, "Cardium (Parvicardium) exiguum" = Parvicardium exiguum
"Cardium (Laevicardium) norvegium" = Laevicardium cockle
"Cardium (Parvicardium) exiguum" = Parvicardium exiguum Gmelin 1791 cockle
 Cardiida - Tellinidae
Tellina pulchella Lamarck 1818 tellin clam
 Carditida - Carditidae
"Cardita calyculata" = Cardita (Cardita) calyculata
"Cardita calyculata" = Cardita (Cardita) calyculata Linnaeus 1758 clam
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Malacostraca
 Decapoda - Carcinidae
Thecostraca
 Balanomorpha - Balanidae
Balanus crenatus Bruguière 1789 barnacle