Tchakras, Amasra region (Triassic of Turkey)

Where: Turkey (41.8° N, 32.5° E: paleocoordinates 15.8° N, 44.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Çakrazboz Formation, Rhaetian (208.5 - 201.3 Ma)

• Laurentiaux states that the sampled unit overlies the Carboniferous coals and assigns a probable Rhaetian (or perhaps Lower Jurassic) age based on the conchostracan "Estheria (Euestheria) minuta var. brodiei Jones." The Çakrazboz Formation contains a latest Triassic flora (mentioned in Gand et al., 2011), so is presumably the source for the insects.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; lithified marl

• Zonguldak-Amasra basin

Size class: macrofossils

Preservation: mold/impression, adpression

Collected by M.F. Charles

• Repository: possibly University of Lille

Primary reference: D. Laurentiaux. 1946. La faune continentale des marnes de Tchakras (Asie Mineure). Annales de la Société Géologique du Nord 66:213-235 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152783: authorized by Matthew Clapham, entered by Matthew Clapham on 01.12.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Conchostraca -
Estheria (Euestheria) minuta Goldfuss 1840 clam shrimp
var. brodiei
Insecta
 Blattaria - Raphidiomimidae
Mesoblattopsis pruvosti n. sp. Laurentiaux 1946 cockroach
 Blattodea - Mesoblattinidae
Actinoblattula charlesi n. sp. Laurentiaux 1946 cockroach
 Dicondylia - Blattulidae
"Mesoblattula piveteaui n. sp." = Blattula piveteaui, Blattula tchakrasensis n. sp.
"Mesoblattula piveteaui n. sp." = Blattula piveteaui Laurentiaux 1946 winged insect
Blattula tchakrasensis n. sp. Laurentiaux 1946 winged insect
 Dicondylia -
Coleoptera indet. Linnaeus 1758 beetle
elytron forms A through D