Dideroceras glauconiticum (Heinrichson, 1935) from
Paroistodus originalis Zone, Volkhovian; 1. Phragrnocone in ventral (a) and lateral (b) views, ZPAL N /02 5; boulder E- 116, Rozewie. 2. Medial section through a phragmocone, IG 8.11.265; Opatów (medieval import from Oland?), 3. Transverse section through a phragmocone at the mid-length of the specimen, ZPAL N/030; boulder E-116. Rozewie.4. Medial section through a  phragmocone, IG 8.11.267; Opatów. 5. Medial section through spiculum of a phragmocone, ZPAL N/039 ; boulder E-228, Międzyzdroje, 6. Transverse section through a phragmocone at the mid-length of the spiculum, ZPAL N/032; boulder E-116, Rozewie. 7. Medial section through spiculum of a phragmocone, ZPAL N/094; boulder E-116, Rozewie, 8. Medial section through spiculum and shell of a phragmocone, IG 8.11.258a; Opatów. 9. Phragmocone in ventral view, IG 8.11.264: Opatów.

Dideroceras glauconitum (Heinrichson, 1935) from P. originalis Zone, Volkhovian; a Reconstruction of apical part of the phragrnocone; b-j section through apical part of a shell; k-l section through siphuncle.