First record of Thylaeodus (Gastropoda: Vermetidae) from the Equatorial Atlantic Ocean, with the description of a new species

被引：5

作者：

Spotorno, Paula ^{[1
]}

Simone, Luiz Ricardo L. ^{[2
]}

机构：

[1] Univ Fed Rio Grande, Museu Oceanog Prof Eliezer de Carvalho Rios, BR-96200580 Rio Grande, RS, Brazil

[2] Univ Sao Paulo, Museu Zool, BR-04299970 Sao Paulo, Brazil

来源：

ZOOLOGIA | 2013年 / 30卷 / 01期

关键词：

Mollusca; Sao Pedro and Sao Paulo Archipelago; taxonomy; anatomy Thylaeodus equatorialis sp nov; vermetid; SAO-PAULO ARCHIPELAGO; REPRODUCTIVE-BIOLOGY; DENDROPOMA; MORPHOLOGY;

D O I：

10.1590/S1984-46702013000100011

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

The vermetid Thylaeodus equatorialis sp. nov. is endemic to the Sao Pedro and Sao Paulo Archipelago, located at the mid equatorial Atlantic Ocean. The species is closely related to Thylaeodus rugulosus (Monterosato, 1878), as indicated by similar shell characters, coloration of the soft parts, and feeding tube scars. However, T equatorialis sp. nov. mainly differs from T rugulosus in the operculum/aperture diameter ratio (similar to 79% versus 100%), by having well developed pedal tentacles and fewer egg capsules in brooding females. In addition, the new species has the following unique characteristics: size almost twice as large (shell, tube aperture, erect feeding tube, protoconch and egg capsules) as the other Atlantic species; unusual method of brooding egg capsules; radula with prominent and more numerous flanking cusps; and small pustules following the suture of the protoconch. A detailed discussion on the taxonomy and biology of vermetid Thylaeodus and allies is also presented.

引用

页码：88 / 96

页数：9

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