Definition of Isorthis. Meaning of Isorthis. Synonyms of Isorthis

- alamanni (Di Stefano, 1884). Isorthis (Ovalella) clarksoni Sp. nov Valid Gallagher & Harper Silurian  United Kingdom Isorthis (Ovalella) equimulticostellata...
- species of this Ordovician genus. Hesperorthis Fox Point Member. An orthide. Isorthis (Ovalella) Fox Point Member. An orthide. Koigia An athyridid, originally...
- Rhynchonellata belonging to the group Retziida and the family Retziidae. Isorthis (Arcualla) delegatensis Sp. nov Valid Strusz & Percival Silurian (Wenlock)...
- †Inversoceras †Inversoceras dayi †Irvingella †Ischadites †Ischadites tenuis †Isorthis †Isorthis clivosa †Isotelus †Isotelus simplex Contents A B C D E F G H I J K...
- extensum †Isophragma subabbreviatum – type locality for species †Isorthis †Isorthis pygmaea †Isotelus Contents A B C D E F G H I J K L M N O P Q R S T...
- type locality for species †Isochilina †Isochilina bulbosa †Isorthis †Isorthis arcuaria †Isorthis pygmaea †Isoteloides †Isoteloides peri †Isotelus †Isotelus...
- †Isochilina †Isochilina labrosa †Isograptus †Isorthis †Isorthis perelegans †Isorthis proinqua †Isorthis propinqua †Isoteloides †Isoteloides canalis †Isoteloides...
- †Ianthinopsis †Inflatia †Innitagnostus †Innitagnostus inexpectans †Isophragma †Isorthis Contents A B C D E F G H I J K L M N O P Q R S T U V W X Y Z †Kingstonia...
- pottsvillensis – type locality for species †Isochilina †Isochilina subnodosa †Isorthis †Isorthis arcuaria – or unidentified related form †Isotelus †Isotelus gigas...
- Isjuminella Ismenia Isochonetes Isocrania Isogramma Isophragma Isopoma Isorthis Isospinatrypa Isovella Israelaria Issedonia Isumithyris Ivanothyris Ivanoviella...