Sphaerirhynchia wilsoni association, Drom Point Fm. (Silurian of Ireland)

Where: Ireland (52.1° N, 10.3° W: paleocoordinates 29.6° S, 18.8° W)

• coordinate based on nearby landmark

When: Drom Point Formation, Wenlock (433.4 - 427.4 Ma)

• "younger than Holcospirifer bigugosus assoc."

Environment/lithology: transition zone or lower shoreface; siltstone

• "sltst w/fine ss w/shell lenses, laminated beds (tempestites) ripples, bioturbation. shallow shelf, nearshore, BA2"

Size class: macrofossils

Primary reference: R. Watkins. 1977. Silurian marine community west of Dingle, Ireland. Palaeogeography, Palaeoclimatology, Palaeoecology 23:79-118 [P. Wagner/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 501: authorized by Jack Sepkoski, entered by Mike Sommers on 17.12.1998, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Watkins, 1977"
Anthozoa
 Auloporida - Syringoporidae
Syringoporidae indet. Fromentel 1864 tabulate coral
syringoporid
 Favositida - Favositidae
Favositidae indet. Dana 1846 tabulate coral
favositid
Cephalopoda
 Orthocerida - Kionoceratidae
? Kionoceras sp. Hyatt 1884
originally entered as "? Kionoceras sp."
Gastropoda
 Murchisoniina -
Murchisonioidea indet. Koken 1896 snail
 Bellerophontida -
Bellerophontida indet. Ulrich and Scofield 1897 snail
bellerophontid
 Euomphalina - Oriostomatidae
Oriostoma sp. Munier-Chalmas 1876 snail
Bivalvia
 Ostreida - Pterineidae
Actinopteria cf. sowerbyi oyster
originally entered as "Actinopteria cf. sowerbyi"
 Cardiiformii -
"Modiomorphoida indet." = Modiomorphida
"Modiomorphoida indet." = Modiomorphida Newell 1969 clam
modiomorphid
 Nuculoida -
"Nuculoida indet." = Nuculida
"Nuculoida indet." = Nuculida Dall 1889 clam
nuculoid
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculites sp. von Schlotheim 1820
Strophomenata
 Strophomenida - Strophochonetidae
 Strophomenida - Rafinesquinidae
"Leptaena depressa" = Leptaena (Leptaena) depressa
"Leptaena depressa" = Leptaena (Leptaena) depressa Sowerby 1824
 Strophomenida - Leptostrophiidae
"Leptostrophia filosa" = Mesoleptostrophia filosa
"Leptostrophia filosa" = Mesoleptostrophia filosa Sowerby 1839
Rhynchonellata
 Rhynchonellida - Camarotoechiidae
Camarotoechia sp. Hall and Clarke 1893
 Rhynchonellida - Hebetoechiidae
Sphaerirhynchia wilsoni de Sowerby 1816
 Orthida - Rhipidomellidae
Dalejina sp. Havlicek 1953
 Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
 Orthida - Draboviidae
Salopina cf. conservatrix McLearn 1924
originally entered as "Salopina cf. conservatrix"
 Atrypida - Atrypidae
Atrypa reticularis Linnaeus 1758
 Spiriferida - Delthyrididae
Howellella sp. Kozlowski 1946
 Athyridida - Hyattidinidae
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
lamellose
Stenolaemata
 Trepostomata -
? Trepostomata indet. Ulrich 1882
ramose - originally entered as "? Trepostomata indet."
Tentaculita
 Cornulitida - Cornulitidae
Cornulites sp. Schlotheim 1820
Trilobita
 Proetida -
Proetida indet. Fortey and Owens 1975 trilobite
proetid
 Phacopida - Calymenidae
Calymene sp. Brongniart 1822 trilobite
 Phacopida - Dalmanitidae
Dalmanites sp. Barrande 1852 trilobite
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
est. 1200 crinoid ossicles in 6.9:3.4 ratio of crinoid debris to other fossils