Strobilops affinis - Eightfold Pinecone

Classification

"What did you call it?"Chicago Field Museum Specimen. Marks are mm. Photo by Terrell Hyde and W.A. Smith, WDNR.

Domain- Eukarya
Strobilops affinis is classified as Eukarya because it has DNA enclosed in a nucleus.

Kingdom- Animalia
Strobilops affinis is classified as Animalia because it is a heterotrophic organism, multicellular, and lacks a cell wall.

Phylum- Mollusca
Strobilops affinis is classified as Mollusca because it has a mantle specialized for excretion and breathing, a nervous system, a coelum, and a soft body that lack a vertebrate. 

Class- Gastropoda
Strobilops affinis is classified as Gastropoda because it has a head, a foot, and a hump that is enclosed in a hard shell.  The word Gastropod comes form the Latin root word for "belly foot."

Subclass- Pulmonata
Strobilops affinis is classified as Pulmonata because instead of having a gill, S. affinis has a vascular lung to obtain oxygen.

Order- Stylommatophora
Strobilops affinis is classified as Stylommatophora because it is an air-breathing terrestrial snail and has two tentacles with eyes at the tips.

Suborder- Orthurethra
Strobilops affinis is classified as Orthurethra based on kidney anatomy.  In S. affinis the ureter does not run along intestine.

Family- Strobilopsidae
Strobilops affinis is classified as Strobilopsidae because it has a small, ribbed shell.  The shell is dome shaped and contains lamellae or folds that are unique only to this family or organisms.  Snails in this family live on dead or decaying logs in moderately damp forests.

Genus- Strobilops
This is the only known genus in the Strobilopsidae family.  Comes from the Greek root word meaning "pinecone."

Species- Strobilops affinis
Strobilops affinis
comes from the Greek root word meaning "Eightfold Pinecone."  This specific species was discovered in 1893 by Henry A. Pilsbry.  The Eightfold Pinecone has an elevated shell with a diameter between 2.75mm and 2.80mm.  The shell is much larger than the other Strobilops species. 

Classification information from (Burch, 1962) and (Pilsbry, 1927-1939, 1939-1948).

Where can I find Strobilops affinis?
HOME