Eurypterid-Associated Biota of the Hogklint Group, Unit D, at Visby (Silurian of Sweden)

Where: Gotland, Sweden (57.6° N, 18.3° E: paleocoordinates 21.6° S, 2.9° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Unit D Member (Hogklint Formation), Sheinwoodian (433.4 - 430.5 Ma)

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; peloidal, calcareous shale and limestone

• " 'very shallow, warm, tranquil water in a sheltered position' (Jaanusson 1979a). Note that eurypterid fragments are also known from the higher energy and somewhat deeper Hogklint B anc D. BA 3"
• "Finely laminated, fine-grained, pelletal, calcareous shale"

Primary reference: R. E. Plotnick. 1999. Habitat of Llandoverian-Lochkovian eurypterids. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities - a case study from the Silurian and Lower Devonian 106-136 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26919: authorized by Michael Foote, entered by Michael Foote on 08.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Asteroidea
  -
Asteroidea indet. de Blainville 1830 sea star
Ophiuroidea
  -
Ophiuroidea indet. Gray 1840 brittle star
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Pterobranchia
 Dendroidea -
Dendroidea indet. Nicholson 1872 graptolite
Lingulata
 Discinida -
Rhynchonellata
 Atrypida - Septatrypidae
Septatrypa sp. Kozlowski 1929
Euchelicerata
 Eurypterida - Eurypteridae
"Baltoeurypterus serratus" = Eurypterus
"Baltoeurypterus serratus" = Eurypterus eurypterid
 Eurypterida - Pterygotidae
"Erettopterus carinatus" = Erettopterus, "Truncatiramus serricaudatus" = Erettopterus
"Erettopterus carinatus" = Erettopterus eurypterid
"Truncatiramus serricaudatus" = Erettopterus eurypterid
 Eurypterida - Dolichopteridae
 Eurypterida -
Scorpionida
 Scorpionida -
Scyphozoa
 Conulariida -
Conulariida indet. Miller and Gurley 1896 jellyfish