Image: haeckel ammonitida

Ammonitida:
Ammonites (Cardioceras) cordatus (Quenstedt) = Cardioceras cordatum (Sowerby 1813), from the side
Ammonites (Cardioceras) cordatus (Quenstedt) = Cardioceras cordatum (Sowerby 1813), from below
Ammonites (Schloenbachia) Coupei (Brogniart) = Schloenbachia varians? (J.Sowerby, 1817), from the side
Ammonites (Schloenbachia) Coupei (Brogniart) = Schloenbachia varians? (J.Sowerby, 1817), from below
Ammonites (Ptychites) opulentus (Mojsisovich) = Ptychites opulentus Mojsisovich, 1882, from the side (outer shell layer removed)
Ammonites (Ptychites) opulentus (Mojsisovich) = Ptychites opulentus Mojsisovich, 1882, from below
Ammonites (ornatus) mammillaris (Schlotheim) = Douvilleiceras mammillatum (Schlotheim 1813), from the side
Ammonites (planulatus) cavernosus (Quenstedt) = Puzosia planulatus (J.Sowerby,1827) cross-section
Ammonites (amaltheus) rotula (Schlotheim) = Amaltheus margaritatus Montfort, 1808, from the side
Ammonites (stephanoceras) Humphryi (Sowerby) = Stephanoceras humphriesianum (Sowerby, 1825), from the side
- from the book sets: Art Forms in Nature (Kunstformen der Natur) - by Ernst Haeckel (1899-1904).

- من صور كتب: النماذج الفنية في الطبيعة، لـ إرنيست هيكل (نشر ما بين 1899-1904 م.)