Alassa

Alassa

: 13.6-11.6
: ()
: Pakhna Formation
: Deep marine slope basin (bathyal)
: Fish (e.g. pipefish, cutlassfish), echinoids (heart urchins), cephalopods (Argonauta, Aturia), planktonic foraminifera, pteropods, nannofossils, occasional plant fragments
: Soft seafloor with burrowing echinoids, abundant plankton, occasional anoxic events, nearby vegetated landmass shedding organic debris

Alassa shown on the globe

Artistic depiction of Actinopterygii

Unknown fish - before cleaning

Unknown fish

Unknown fish - body detail

+1

Unknown fish

Unknown fish

Fish

Artistic depiction of Aves

Pre-preparation

Prepared. Bird(?)

Damaged (by preparation)

+1

Artistic depiction of Bivalvia

Pre-preparation

Radiating lines are visible

Radiating lines are visible

Artistic depiction of Chordata

Spine and (?)fins

Scale and (?)plant remains

Spine and (?)head

Spine and (?)head

Spine and (?)part of body

Scales (from a tail?)

+1

Spine and (?)head

Scales (of a fish?), elongated shape. 7 fragments

3 large fragments

Large fragments. Side Α

+6

Scales (of a fish?), elongated shape. 7 fragments

3 large fragments

Large fragments. Side Α

Large fragment. Side B

Small fragments

Small fragment A, detail

Small fragment B, detail

Small fragment C, detail

Small fragment D, detail

Spine and (?)head

Scales

Scale

+1

Unclear detail with spine - perhaps a fish head

+1

Scale + negative impression

Scale

Negative impression

Fish tail

View A

View A - detail. Fish(?)

View B

+1

Artistic depiction of Heterobrissus montesi

In-situ, in a riverbed. Very eroded

+1

In-situ, inside the matrix

After digging up

The sample has been removed from the rock

+2

Artistic depiction of Ostreida

+1

Artistic depiction of Plantae

Leaf

Scale and (?)plant remains

Plant(?) - perhaps Posidonia oceanica?

Various plant(?) impressions

Detail

Detail

+1

View A

View A - detail. Fish(?)

View B

+1

Artistic depiction of Unclassified

Unknown

Conical impressions.

Conical impressions.

Conical impressions.

+4

Conical impressions.

Conical impressions.

Conical impressions.

Conical impressions.

Conical impressions.

Conical impressions.

Conical impressions.

Unclear detail with spine - perhaps a fish head

+1

+1

Artistic depiction of Venus

3-4 shells. One likely of the genus Venus