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Cardiapoda richardi Vassi?re 1904

Roger R. Seapy
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Containing group: Cardiapoda

Introduction

Cardiapoda richardi is distinguished from C. placenta by the following: small adult body size (to about 30 mm); eight gills located at the entrance to the mantle cavity; lens of the eye rests in a depression in a black base of hemispherical shape; fin sucker present only in males; tail with a low dorsal crest, a retractable, brown membranous structure on the mid-ventral surface, and a reddish-brown, filamentous tail extension.

Brief Diagnosis

A species of Cardiapoda with:

Characteristics

  1. Body morphology
    1. Eight gills located at entrance to mantle cavity
    2. Tentacles elongate and of equal length
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      Click on an image to view larger version & data in a new window

      Figure. Frontal view of Cardiapoda richardi.  Elongate pair of tentacles project outward from proboscis, which is directed toward the viewer. © L. Madin

    3. Numerous, small white spots cover the body. In side profile the spots appear elevated, like very low tubercles (click on the photo below for enlarged view).  Each spot appears to consist of a cluster of minute, white specks.
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      Click on an image to view larger version & data in a new window

      Figure. Right side of body in Cardiapoda richardi. Small, white spots cover the body. © L. Madin

    4. Lens of eye rests in a cup-like depression in a large, pigmented base

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      Click on an image to view larger version & data in a new window

      Figure. Side view of head region in Cardiapoda richardi. The spherical lens rests in a hemispherical, solid black base. © L. Madin

    5. Tail with a low dorsal crest, a brown membranous structure (see first title illustration) that can be retracted into an elongate mid-ventral groove (see below), and a terminal reddish-brown, filamentous extension that is highly contractile (compare the length of the tail extension in the two title illustrations).
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      Click on an image to view larger version & data in a new window

      Figure. Ventro-lateral view of tail in Cardiapoda richardi. Note the low dorsal crest and the elongate indentation on the mid-ventral surface into which the brown membranous structure is retracted. © L. Madin

  2. Shell
    1. Adult shell not characterized in the literature, but presumably similar to that of C. placenta (see C. placenta page)
    2. Larval shell globular, consisting of 3.25 whorls at the time of metamorphosis (Seapy, unpubl.). Spire whorls smooth except for a pair of elevated spiral ridges on the second whorl. Umbilicus open, with about 13 elevated, radiating striae on wall. Aperture wide, slightly greater than 1/2 shell diameter
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      Click on an image to view larger version & data in a new window

      Figure. Scanning electron micrographs of the larval shell of Cardiapoda richardi, viewed from the right side, left side, and aperture. Shell diameter = 0.6 mm. © R. Seapy

References

Lalli, C. M. and R. W. Gilmer. 1989. Pelagic snails. The biology of holoplanktonic gastropod snails. Stanford: Stanford University Press. 259 pp.

Richter, G. and R. R. Seapy. 1999. Heteropoda, pp. 621-647. In: D. Boltovskoy (ed.), South Atlantic Zooplankton. Leiden: Backhuys Publ.

Seapy, R. R. and C. Thiriot-Quievreux. 1994. Veliger larvae of Carinariidae (Mollusca: Heteropoda) from Hawaiian waters. Veliger 37:336-343.

Tesch, J. J. 1949. Heteropoda. Dana Report 34. 54 pp.

Thiriot-Qui?vreux, C. Observations sur les larves et les adulte de Carinariidae (Mollusca: Heteropoda) de l'Oc?an Atlantique Nord. Marine Biology 32: 379-388.

Title Illustrations
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Click on an image to view larger version & data in a new window
Scientific Name Cardiapoda richardi
Location Florida Current
Specimen Condition Live Specimen
Sex Female
Life Cycle Stage adult
View left side
Size 65 mm
Copyright © Ronald Gilmer
Scientific Name Cardiapoda richardi
Location Sargasso Sea
Specimen Condition Live Specimen
Sex Female
Life Cycle Stage adult
View ventral
Copyright © L. Madin
About This Page


California State University, Fullerton, California, USA

Correspondence regarding this page should be directed to Roger R. Seapy at

Page: Tree of Life Cardiapoda richardi Vassi?re 1904. Authored by Roger R. Seapy. The TEXT of this page is licensed under the Creative Commons Attribution License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.

Citing this page:

Seapy, Roger R. . 2008. Cardiapoda richardi Vassi?re 1904. Version 12 February 2008. http://tolweb.org/Cardiapoda_richardi/28745/2008.02.12 in The Tree of Life Web Project, http://tolweb.org/

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