Subclass

Orthogastropoda Ponder et Lindberg, 1997

Selection of related publications

Toom, U., Vinn, O., Isakar, M., Madison, A., Hints, O. 2020. Small faecal pellets in Ordovician shelly fossils from Estonia, Baltoscandia. Estonian Journal of Earth Sciences 69, 1, 1-19. DOI:10.3176/earth.2020.01

Frisk, Ǻ. M., Ebbestad, J. O. R. 2007. Paragastropoda, Tergomya and Gastropoda (Mollusca) from the Upper Ordovician Dalby Limestone, Sweden. GFF 129, 2, 83-99. DOI:10.1080/11035890701292083

Isakar, M. 1990. Bivalvia and Gastropoda. Field Meeting Estonia 1990. An Excursion Guidebook, pp. 64-65. Estonia Academy of Sciences.

Saladžius, V. J. 1966. Mollusk fauna of the Silurian deposits of the south of the East Baltic territory. Palaeontology and stratigraphy of the Baltic and the Byelorussia. Number I (VI), pp. 31-73. Mintis.

Öpik, A. 1930. Beiträge zur Kenntnis der Kukruse-(C2-C3-)Stufe in Eesti. IV. Tartu Ülikooli Geoloogia Instituudi Toimetused 24, 1-34.

Koken, E., Perner, J. 1925. Die Gastropoden des baltischen Untersilurs. Zapiski Rossiiskoi Akademii Nauk 37, 1, 1-318. Venemaa Teaduste Akadeemia.

Bekker, H. 1925. Lühike ülevaade Eesti geoloogiast (Eozoiline ja paleozoiline ladekond). Eesti Loodus. Äratrükk koguteosest "Eesti", pp. 31-61.

Lindström, G. 1884. On the Silurian Gastropoda and Pteropoda of Gotland. Kungliga Svenska Vetenskapsakademiens Handlingar 19, 6, 1-250. P. A. Norstedt.

Kjerulf, T. 1865. Veiviser ved geologiske excursioner i Christiania Omegn med et Farvetrykt Kart or Flere Traensit. Universitätsprogram for andet Halvaar 1865. pp. . Brøgger & Christie's Bogtrykkeri.

Eichwald, E. 1860. Lethaea Rossica ou Paléontologie de la Russie. Premier volume. Ancienne Période en deux sections. pp. XIX+1–1657. E. Schweizerbart. DOI:10.5962/bhl.title.52391

Schmidt, Fr. 1858. Untersuchungen über die Silurische Formation von Ehstland, Nord-Livland und Oesel. Archiv für die Naturkunde Liv-, Ehst- und Kurlands 2, 1, 1-249. Heinrich Laakmann.

Eichwald, E. 1854. Die Grauwackenschichten von Liv- und Estland. Bulletin de la Société Imperiale des Naturalistes de Moscou 27, 1, 1-111.

Pacht, R. 1849. Der devonische Kalk in Livland. Ein Beitrag zur Geognosie der Ostseeprovinzen. pp. . J. C. Schünmann's Wittwe und C. Mattiesen.

List of species

1. Brachytomaria baltica (Verneuil, 1845) | Jõhvi Substage→Rakvere Stage

2. Brachytomaria nodulosa (Schmidt, 1858) | Nabala Stage→Pirgu Stage

3. Brachytomaria plautini Koken et Perner, 1925 | Kunda Stage

4. Brachytomaria plicifera (Eichwald, 1854) | Vormsi Stage→Pirgu Stage

5. Cataschisma nitida (Koken et Perner, 1925) | Porkuni Stage

6. Cataschisma winkleri (Öpik, 1930) | Kukruse Stage

7. Deaechospira elliptica (Hisinger, 1831) | Lasnamägi Stage→Kukruse Stage

8. Deaechospira inflata (Koken, 1896) | Aseri Stage→Lasnamägi Stage

9. Deaechospira maritima (Koken, 1897) | Aseri Stage

10. Ectomaria nieszkowskii (Schmidt, 1858) | Porkuni Stage

11. Eocryptaenia singularis Koken et Perner, 1925 | Porkuni Stage

12. Eotomaria notabilis (Eichwald, 1840)

13. Eunema sulcifera (Eichwald, 1840) | Nabala Stage

14. Globonema piersalense (Koken, 1897) | Pirgu Stage

15. Hormotoma exilis (Eichwald, 1854) | Rakvere Stage→Nabala Stage

16. Hormotoma insignis (Eichwald, 1856) | Rakvere Stage→Pirgu Stage

17. Hormotoma meyendorfi (Koken, 1896) | Porkuni Stage

18. Hormotoma rudis Koken et Perner, 1925 | Pirgu Stage

19. Hormotoma scorbiculata (Koken, 1897) | Pirgu Stage

20. Latitaenia aequicrescens (Koken, 1897) | Vormsi Stage

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Mollusca
Class	Gastropoda
Subclass	Archaeobranchia
	Archaeogastropoda
	Eogastropoda
	Neritimorpha
	Orthogastropoda
Order	Murchisoniina
Family	Pleurotomariidae
Subclass	Prosobranchia
	Streptoneura
Order	Bellerophontida
	Heterostropha
Superfamily	Patelloidea
Genus	Semizona