Suecoceras holmi Patrunky, 1929 from Eoplacognathus reclinatus Zone, Lasnarnagian. 1. Phragmocone in ventral view (a, b), ZPAL N/070; erratic boulder E-138, Międzyzdroje. 2. Phragrnocone, ZPALN/969; same boulder. 3. Longitudinal (a) and transverse (b) sections through the apical part of inflated larval shell, ZPAL N/07l; eratic boulder E-132. 4. Phragmocone in ventral view, ZPAL N/074; Mochty. 5. Phragmocone in ventral view, ZPAL N/075; Zgierz .

Suecoceras holmi (Patrunky, 1926). a Reconstruction of longitudinal section through apical part of the shell, mostly from the specimen ZPAL N/071. b section through a siphuncle, ZPAL N/079, erratic boulder, Orlowo, Poland.