Talacasto Formation Echinoderms, southwestern Jachal, Argentine Precordillera (Devonian of Argentina)

Where: Jachal, Argentina (30.5° S, 68.5° W: paleocoordinates 58.0° S, 118.4° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Talacasto Formation, Early/Lower Devonian (419.2 - 393.3 Ma)

• Upper Talacasto Formation

• formation-level stratigraphic resolution

Environment/lithology: marine; micaceous, calcareous siltstone

• "The green-gray siltstone is slightly calcitic and contains some mica...fine parallel laminations are discernible in cross-section"

Primary reference: R. Haude. 1995. Echinodermen aus dem Unter-Devon der argentinischen Praekordillere. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 197(1):37-86 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 39230: authorized by Michael Foote, entered by Michael Foote on 24.05.2004, edited by Loic Villier

Creative Commons license: CC BY (attribution)

Taxonomic list

• Echinoderms only
unclassified
  -
Holothuroidea
 Dendrochirotida -
Andenothyone gondwanensis n. gen. n. sp. sea cucumber
Ophiuroidea
 Oegophiurida - Protasteridae
Furcaster separatus n. sp. brittle star
  - Encrinasteridae
"Marginaster yachalensis" = Marginura
"Marginaster yachalensis" = Marginura brittle star
 Ophiurida - Ophiurinidae
Asteroidea
  -
Promopalaeaster quadriserialis n. gen. n. sp. sea star
Stylophora
 Mitrata -
Yachalicystis triangularis n. gen. n. sp., Occultocystis koeneni n. gen. n. sp.
Occultocystis koeneni n. gen. n. sp.
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
 Cyathocrinida - Euspirocrinidae
Manocrinus maldigitatus Haude 2004 Sea lily
 Diplobathrida -
Acanthocrinus benedettoi Haude 2004 crinoid
Apurocrinus sp. McIntosh 1981 Sea lily