Ortona Lock [Belle Glade Mbr, Bermont Fm] (Pleistocene of the United States)

Where: Palm Beach County, Florida (26.8° N, 81.3° W: paleocoordinates 26.8° N, 81.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Belle Glade Member (Bermont Formation), Middle Pleistocene (0.8 - 0.1 Ma)

• STRATIGRAPHIC RELATIONS: Presumably from Bermont Formation, formely referred to as the "Glades" unit (McGinty 1970, Hoerle 1970), or Unit A (Olsson 1964), which overlies the Caloosahatchee Fm (Plio-Pleistocene) and underlies the Pleistocene Fort Thompson Fm. THICKNESS: Unknown thickness of unit, or strata from which collection was obtained. AGE: Early Pleistocene. STRATIGRAPHIC POSITION: Unknown position within formation, presumably collection represents the entire unit.

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; unlithified, shelly/skeletal, silty marl

• ENVIRONMENT: Similar to those occuring off the ocean side of the Florida Keys . Greater proportion of unit represents soft mud or marl with 1 or 2 fathoms of sea water and large beds of Thalassia or "turtle grass". Sand bars, indicated by vast numbers of Oliva in the deposit, must also have existed, for Oliva would only have lived in such a situation. Rocky or reef bottom would appear to have been restricted, for species which require such an ecological sitiation prove scarce.
• SPECIFIC LITHOLOGY: Shell marl and mudstone. LITHIFICATION: Unlithified on the basis of facies description and figured specimens.

Size class: macrofossils

Preservation: original aragonite, original calcite

Reposited in the FMNH

Collection methods: bulk, quarrying, surface (float),

• COLLECTOR: R.C. Hoerle, S. Hoerle, T.L. McGinty and P. McGinty. REPOSITORY: Probably within private collections, though much of T.L. McGinty's collection is now reposited at FLMNH.

Primary reference: T. L. McGinty. 1970. Mollusca of the "Glades" unit in southern Florida: Part I Introduction and observations. Tulane Studies in Geology and Paleontology 8(2):53-56 [A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 67070: authorized by Austin Hendy, entered by Austin Hendy on 06.11.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not exhaustive, but listing characteristic forms from this locality. NOMENCLATURE: Not an authoritative publication, but uses fairly modern nomenclature with species-level designations.
Bivalvia
 Pholadida - Corbulidae
"Corbula scutata" = Juliacorbula scutata
"Corbula scutata" = Juliacorbula scutata Gardner 1943 clam
 Cardiida - Cardiidae
 Cardiida - Semelidae
Semele perlamellosa Heilprin 1887 clam
 Arcida - Arcidae
Anadara aequalis, "Barbatia tenera" = Fugleria tenera
"Barbatia tenera" = Fugleria tenera Reeve 1844 Delicate Ark
Gastropoda
 Sorbeoconcha - Ovulidae
"Cyphoma intermedium" = Pseudocyphoma intermedium
"Cyphoma intermedium" = Pseudocyphoma intermedium Sowerby 1828 snail
 Sorbeoconcha - Cypraeidae
"Cypraea cervus" = Macrocypraea cervus
"Cypraea cervus" = Macrocypraea cervus Linnaeus 1771 cowry
 Sorbeoconcha - Cassidae
 Sorbeoconcha - Tonnidae
Tonna galea Linnaeus 1758 tun shell
 Sorbeoconcha - Strombidae
 Neogastropoda - Harpidae
"Morum oniscus" = Morum (Morum) oniscus
"Morum oniscus" = Morum (Morum) oniscus Linnaeaus 1767 snail
 Neogastropoda - Muricidae
"Tripterotyphis triangularis" = Pterotyphis (Tripterotyphis) triangularis, Murexiella graceae, "Murex bellegladeensis" = Vokesimurex bellegladeensis, "Murex anniae" = Vokesimurex anniae
"Tripterotyphis triangularis" = Pterotyphis (Tripterotyphis) triangularis Adams 1855 murex snail
Murexiella graceae McGinty 1940 murex snail
"Murex bellegladeensis" = Vokesimurex bellegladeensis Vokes 1963 murex snail
"Murex anniae" = Vokesimurex anniae Smith 1940 murex snail
 Neogastropoda - Buccinidae
Monostiolum thomasi Olsson 1967 true whelk
Bailya intricata Dall 1884 true whelk
 Neogastropoda - Melongenidae
Melongena bispinosa Philippi 1844 snail
 Neogastropoda - Fasciolariidae
Fasciolaria okeechobeensis tulip snail
[entered as Fasciolaria okeechobensis]
"Latirus jucundus" = Polygona jucunda McGinty 1940 snail
 Neogastropoda - Cancellariidae
"Trigonostoma rugosa" = Bivetopsia rugosa
"Trigonostoma rugosa" = Bivetopsia rugosa Lamarck 1822 snail
 Neogastropoda - Turbinellidae
 Cerithioidea - Batillariidae