On Pomacea sordida (Swainson, 1823) (Prosobranchia, Ampullariidae)

Memórias do Instituto Oswaldo Cruz

Silvana Carvalho Thiengo¹ 

[1] ,Instituto Oswaldo Cruz Departamento de Malacologia Rio de Janeiro,Brasil

关键词: Mollusca;    Ampullariidae;    Pomacea sordida;    Pomacea lineata;    morphology;    Mollusca;    Ampullariidae;    Pomacea sordida;    Pomacea lineata;    morfologia;   

DOI  :  10.1590/S0074-02761989000300009

来源: SciELO

【 摘 要 】

A description of Pomacea sordida (Swainson, 1823) collected in Caxias and Nova Iguaçu, state of Rio de Janeiro, is presented. The shell is globose, heavy, whith greenish or horn-colored periostracum and dark spinal bands; apex subelevated, 4-5 moderately shoudered whorls, increasing rather rapidly and separated by deep suture. Aperture large, moderately round, yellowish or violaceous; lip thick and sometimes dark brown; umbilicus large and deep; operculum corneous and heavy, entirely closing the aperture. Ratios: shell width/shell length = 0.81-0.91 (mean 0.86); aperture length/shell length = 0.66-0.75 (mean 0.70). Testis, spermiduct and penis pouch as in Pomacea lineata (Spix, 1827). Seminal vesicle whitish and bean-shaped. Prostate cylindric and narrow, cream in coloar as the testis. Penis whiplike whith a closed circular spermiduct. Penial sheath elongated and tapered, with its distal tip turned to the right; outer basal gland situated on the left; inner median gland rounded; apical gland elongated and wrinkled. Ovary composed of branched whitish tubules lying superficially on the digestive gland; oviduct and seminal receptacle as in P. lineata; albumen gland yellowish - orange. Vestigial male copulatory apparatus (penis and its sheath) present in all females examined.

【 授权许可】

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