Two western Atlantic vitrinellids, Cyclostremiscus beauii (Fischer, 1857) and Circulus texanus (Moore, 1965) new combination are redescribed based on a study of live snails from the burrows of the stomatopod crustacean Lysiosquilla scabricauda (Lamarck, 1818). Anatomy and reproductive biologyare emphasized, with the first recorded description of spawn and larval development in the family. Synonymies are given, and a lectotype isselected for Cy. beauii. Literature data concerning anatomy are reviewed for the marine near-planispiral rissoaceans; Vitrinellidae (including Cyclostremiscus and Circulus, with Circulidae as a synonym) is considered distinct from Tornidae. Unusual morphological aspects of Cy. beauii are discussed, including external ciliation patterns, pallial tentacles (which are functionally and morphologically different from each other), and stomach morphology (with a large posterior chamber). Protandroussequentialhermaphroditismin Cy. Beauii is inferred (for the first time in the Rissoacea) from morphological evidence of sex change correlated with size.
Member of
Contributors
Publisher
The Bailey-Matthews Shell Museum
Date Issued
1988
Note
Language
Type
Genre
Extent
30 p.
Subject (Topical)
Identifier
3351935
Additional Information
Two western Atlantic vitrinellids, Cyclostremiscus beauii (Fischer, 1857) and Circulus texanus (Moore, 1965) new combination are redescribed based on a study of live snails from the burrows of the stomatopod crustacean Lysiosquilla scabricauda (Lamarck, 1818). Anatomy and reproductive biologyare emphasized, with the first recorded description of spawn and larval development in the family. Synonymies are given, and a lectotype isselected for Cy. beauii. Literature data concerning anatomy are reviewed for the marine near-planispiral rissoaceans; Vitrinellidae (including Cyclostremiscus and Circulus, with Circulidae as a synonym) is considered distinct from Tornidae. Unusual morphological aspects of Cy. beauii are discussed, including external ciliation patterns, pallial tentacles (which are functionally and morphologically different from each other), and stomach morphology (with a large posterior chamber). Protandroussequentialhermaphroditismin Cy. Beauii is inferred (for the first time in the Rissoacea) from morphological evidence of sex change correlated with size.
This author manuscript appears courtesy of The Nautilus, a peer-reviewed, not-for-profit quarterly published by the non-profit organization The Bailey-Matthews Shell Museum. The published version is available at http://shellmuseum.org/nautilus/index.html and may be cited as: Bieler, R., & Mikkelsen, P. M. (1988). Anatomy and reproductive biology of two Western Atlantic species of Vitrinellidae, with a case of protandrous hermaphroditism in the Rissoacea. The Nautilus, 102(1), 1-29.
Florida Atlantic University. Harbor Branch Oceanographic Institute contribution #622.
Date Backup
1988
Date Text
1988
Date Issued (EDTF)
1988
Extension
FAU
FAU
admin_unit="FAU01", ingest_id="ing13496", creator="creator:BCHANG", creation_date="2012-08-10 17:12:30", modified_by="super:FAUDIG", modification_date="2014-02-14 12:59:03"
IID
FADT3351935
Issuance
single unit
Organizations
Attributed name: Harbor Branch Oceanographic Institute
Person Preferred Name
Bieler, R.
creator
Physical Description
30 p.
Title Plain
Anatomy and reproductive biology of two Western Atlantic species of Vitrinellidae, with a case of protandrous hermaphroditism in the Rissoacea
Origin Information
The Bailey-Matthews Shell Museum
1988
single unit
Title
Anatomy and reproductive biology of two Western Atlantic species of Vitrinellidae, with a case of protandrous hermaphroditism in the Rissoacea
Other Title Info
Anatomy and reproductive biology of two Western Atlantic species of Vitrinellidae, with a case of protandrous hermaphroditism in the Rissoacea