Crepidula argentina (Gastropoda: Calyptraeidae), a new species from the littoral of Argentina

Crepidula argentina, a new species of gastropod of the family Calyptraeidae, is described from the littoral of Mar del Plata, province of Buenos Aires, Argentina. The new species is conchologically similar to C. protea d'Orbigny from southern Brazil. Crepidula argentina has a larger, subcircula...

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Autores principales: Simone, L.R.L., Pastorino, G., Penchaszadeh, P.E.
Formato: JOUR
Lenguaje:English
Materias:
Anatomy
Crepidula protea
Littoral
Reproduction
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00281344_v114_n4_p127_Simone
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00281344_v114_n4_p127_Simone2023-10-03T14:38:42Z Crepidula argentina (Gastropoda: Calyptraeidae), a new species from the littoral of Argentina Simone, L.R.L. Pastorino, G. Penchaszadeh, P.E. Anatomy Crepidula protea Littoral Reproduction Crepidula argentina, a new species of gastropod of the family Calyptraeidae, is described from the littoral of Mar del Plata, province of Buenos Aires, Argentina. The new species is conchologically similar to C. protea d'Orbigny from southern Brazil. Crepidula argentina has a larger, subcircular shell and lower convexity than C. protea. Anatomical characters that allow differentiation from this latter species are: larger lateral shell muscle and very weak dorsal shell muscle; kidney proportionally smaller, with a characteristic arrangement of inner folds of dorsal lobe; presence of a renal vessel edging rectum and working as adrectal sinus; connection between odontophore muscle pairs m7 and m11; longer salivary gland; four ducts to digestive gland in stomach (instead of two); distinctive arrangement of folds in inner surface of stomach between esophageal aperture and posterior pair of ducts to digestive gland; seminal vesicle of males broad and few coiled; penis and papilla long and narrow; vaginal tube running closely attached to capsule gland. The reproductive biology is also distinctive. Crepidula argentina new species has a very well defined seasonal reproductive cycle. Females brood between 1 and 46 egg capsules per spawn. The average total number of embryos per spawn is 5600. The uncleaved, laid egg diameter is 170 μm and the number of eggs per egg capsule is about 320. All eggs develop, there are no nurse eggs. Larvae hatch as planktotrophic veligers. The new species is compared with other members of the genus Crepidula from the southern Atlantic coast of South America. Fil:Penchaszadeh, P.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00281344_v114_n4_p127_Simone
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language English
orig_language_str_mv English
topic Anatomy
Crepidula protea
Littoral
Reproduction
spellingShingle Anatomy
Crepidula protea
Littoral
Reproduction
Simone, L.R.L.
Pastorino, G.
Penchaszadeh, P.E.
Crepidula argentina (Gastropoda: Calyptraeidae), a new species from the littoral of Argentina
topic_facet Anatomy
Crepidula protea
Littoral
Reproduction
description Crepidula argentina, a new species of gastropod of the family Calyptraeidae, is described from the littoral of Mar del Plata, province of Buenos Aires, Argentina. The new species is conchologically similar to C. protea d'Orbigny from southern Brazil. Crepidula argentina has a larger, subcircular shell and lower convexity than C. protea. Anatomical characters that allow differentiation from this latter species are: larger lateral shell muscle and very weak dorsal shell muscle; kidney proportionally smaller, with a characteristic arrangement of inner folds of dorsal lobe; presence of a renal vessel edging rectum and working as adrectal sinus; connection between odontophore muscle pairs m7 and m11; longer salivary gland; four ducts to digestive gland in stomach (instead of two); distinctive arrangement of folds in inner surface of stomach between esophageal aperture and posterior pair of ducts to digestive gland; seminal vesicle of males broad and few coiled; penis and papilla long and narrow; vaginal tube running closely attached to capsule gland. The reproductive biology is also distinctive. Crepidula argentina new species has a very well defined seasonal reproductive cycle. Females brood between 1 and 46 egg capsules per spawn. The average total number of embryos per spawn is 5600. The uncleaved, laid egg diameter is 170 μm and the number of eggs per egg capsule is about 320. All eggs develop, there are no nurse eggs. Larvae hatch as planktotrophic veligers. The new species is compared with other members of the genus Crepidula from the southern Atlantic coast of South America.
format JOUR
author Simone, L.R.L.
Pastorino, G.
Penchaszadeh, P.E.
author_facet Simone, L.R.L.
Pastorino, G.
Penchaszadeh, P.E.
author_sort Simone, L.R.L.
title Crepidula argentina (Gastropoda: Calyptraeidae), a new species from the littoral of Argentina
title_short Crepidula argentina (Gastropoda: Calyptraeidae), a new species from the littoral of Argentina
title_full Crepidula argentina (Gastropoda: Calyptraeidae), a new species from the littoral of Argentina
title_fullStr Crepidula argentina (Gastropoda: Calyptraeidae), a new species from the littoral of Argentina
title_full_unstemmed Crepidula argentina (Gastropoda: Calyptraeidae), a new species from the littoral of Argentina
title_sort crepidula argentina (gastropoda: calyptraeidae), a new species from the littoral of argentina
url http://hdl.handle.net/20.500.12110/paper_00281344_v114_n4_p127_Simone
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AT pastorinog crepidulaargentinagastropodacalyptraeidaeanewspeciesfromthelittoralofargentina
AT penchaszadehpe crepidulaargentinagastropodacalyptraeidaeanewspeciesfromthelittoralofargentina
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