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  • 1
    Electronic Resource
    Electronic Resource
    Heart, pericardium, coelomoduct openings, and juvenile gonad in Chaetoderma nitidulum and Falcidens caudatus (Mollusca, Aplacophora) (1973)
    Springer
    Zoomorphology 76 (1973), S. 97-107 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. The single auricle of Chaetoderma nitidulum originates as double invaginations of pericardial epithelium; these invaginations lie laterally at the base of an intrapericardial channel and receive blood from a capacious gill sinus into which empty the dorsally situated efferent vessels of the gills. The ventricle and aortal bulb with its strong sphincter change shape markedly during systole and diastole. The auriculo-ventricular valve is a cup-shaped check valve, the blind end facing posteriorly toward the auricle. It is attached medially both dorsally and ventrally to the wall of the auriculo-ventricular opening, thus forming a double passage. The heart of Falcidens remains to be described in detail. The ventricle in neither genus is open to the dorsal sinus. 2. The pericardium in Falcidens caudatus and Chaetoderma nitidulum divides medially around the dorsal gill retractors, forming an intrapericardial channel connecting the gill sinus and dorsal sinus. The pericardium is completely closed off from the dorsal sinus. A pair of lateral V-shaped extensions open ventrally into the coelomoducts. 3. The male coelomoduct openings into the mantle cavity of C. nitidulum and F. caudatus pass through strong sphincters, which may or may not be protruded into papillae. The female openings are slits also surrounded by sphincters. Paired funnel-shaped areas of the mantle wall epithelium of females only are produced into columnar gland cells and surround the openings; their function is not known. 4. The gonad primordium of juvenile C. nitidulum is paired; the anlagen lie in paired coelomic lumina. As in Bivalvia, adults do not distinctly show a paired condition in the ripe gonad. 5. The shape of the heart, the supposed number of auriculo-ventricular openings, and the type of coelomoduct openings into the mantle cavity are not useful taxonomic characters for species differentiation in the family Chaetodermatidae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00452060
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  • 2
    Electronic Resource
    Electronic Resource
    The radula of the chaetodermatidae (Mollusea, Aplaeophora) (1972)
    Springer
    Zoomorphology 72 (1972), S. 361-370 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Members of the aplacophoran family Chaetodermatidae (genera Falcidens and Chaetoderma) have a radula consisting of a single cone-shaped structure associated with a pair of teeth. In the genus Falcidens there also occurs a plate with two pairs of apophyses that wrap around the paired teeth. 2. One species of each genus is known to feed on foraminifera. 3. The buccal mass bears many similarities to the gastropod buccal mass: it lies in a buccal cavity; it is covered distally by a membrane connected to the radula, apparently the subradular membrane; it contains a pair of bolsters, from which run muscles to the radula and subradular membrane; and it has a blood sinus surrounding a sac of epithelial cells which secrete the cone-shaped radula. This sac appears to be homologous to the radula gland of other mollusks. It lies above and between the bolsters, and at its ventral, blind end are four large cells, the odontoblasts. 4. The cone-shaped median structure appears to be a fused, permanent, continuously secreted radula. The structures seen with scanning electron microscopy, the increase in size with size of animal, and the indication of tanning by the radula gland support this view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00283130
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  • 3
    Electronic Resource
    Electronic Resource
    Pelagic larvae of New England intertidal gastropods II. Anachis avara (1963)
    Springer
    Hydrobiologia 22 (1963), S. 85-91 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die Arbeit beschreibt die Eierkapseln, die pelagischen Larven und die Jugendformen von Anachis avara Say, einer prosobranchen Gastropoden-Spezies, die zur Familie der Columbelliden gehört. Abbildungen von Exemplaren, die im Laboratorium aufgezogen wurden, werden wiedergegeben.
    Notes: Summary The egg case, pelagic larvae, and young juvenile of Anachis avara Say, a species of prosobranch gastropod belonging to the family Columbellidae, are described and figured from specimes reared in the laboratory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039683
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  • 4
    Electronic Resource
    Electronic Resource
    Pelagic larvae of New England intertidal gastropods (1965)
    Springer
    Hydrobiologia 25 (1965), S. 321-329 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die Arbeit beschreibt die Eierkapseln, die pelagischen Larven und die Postlarven vonNassarius trivittatus Say. Abbildungen von Examplaren, die im Laboratorium aufgezogen wurden, werden wiedergegeben.
    Notes: Summary The egg case, pelagic larva and postlarva ofNassarius trivittatus Say are described and figured from specimens reared in the laboratory. Similarities and differences in the larvae of New England and European species ofNassarius are indicated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00838496
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  • 5
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    Pelagic larvae of New England intertidal gastropods (1965)
    Springer
    Details
    Publication Date: 1965-05-01
    Print ISSN: 0018-8158
    Electronic ISSN: 1573-5117
    Topics: Biology
    Published by Springer
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  • 6
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    Pelagic larvae of New England intertidal gastropods II. Anachis avara (1963)
    Springer
    Details
    Publication Date: 1963-09-01
    Print ISSN: 0018-8158
    Electronic ISSN: 1573-5117
    Topics: Biology
    Published by Springer
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  • 7
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    PROCHAETODERMATIDAE OF THE EASTERN ATLANTIC OCEAN AND MEDITERRANEAN SEA (MOLLUSCA: APLACOPHORA) (2000)
    Oxford University Press
    Details
    Publication Date: 2000-08-01
    Print ISSN: 0260-1230
    Electronic ISSN: 1464-3766
    Topics: Biology
    Published by Oxford University Press
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  • 8
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    A natural history of the deep-sea aplacophoran Prochaetoderma yongei and its relationship to confamilials (Mollusca, Prochaetodermatidae) (2009)
    Elsevier
    Details
    Publication Date: 2009-09-01
    Print ISSN: 0967-0645
    Electronic ISSN: 1879-0100
    Topics: Biology , Geosciences , Physics
    Published by Elsevier
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  • 9
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    Hard and soft anatomy in two genera of Dondersiidae (Mollusca, Aplacophora, Solenogastres) (2012)
    Marine Biological Laboratory
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Marine Biological Laboratory, 2012. This article is posted here by permission of Marine Biological Laboratory for personal use, not for redistribution. The definitive version was published in Biological Bulletin 222 (2012): 233-269.
    Description: Phylogenetic relationships and identifications in the aplacophoran taxon Solenogastres (Neomeniomorpha) are in flux largely because descriptions of hard parts––sclerites, radulae, copulatory spicules––and body shape have often not been adequately illustrated or utilized. With easily recognizable and accessible hard parts, descriptions of Solenogastres are of greater use, not just to solenogaster taxonomists, but also to ecologists, paleontologists, and evolutionary biologists. Phylogenetic studies of Aplacophora, Mollusca, and the Lophotrochozoa as a whole, whether morphological or molecular, would be enhanced. As an example, morphologic characters, both isolated hard parts and internal anatomy, are provided for two genera in the Dondersiidae. Five species are described or redescribed and earlier descriptions corrected and enhanced. Three belong to Dondersia: D. festiva Hubrecht, D. incali (Scheltema), and D. namibiensis n. sp., the latter differentiated unambiguously from D. incali only by sclerites and copulatory spicules. Two species belong to Lyratoherpia: L. carinata Salvini-Plawen and L. californica (Heath). Notes are given for other species in Dondersiidae: L. bracteata Salvini-Plawen, Ichthyomenia ichthyodes (Pruvot), and Heathia porosa (Heath). D. indica Stork is synonymized with D. annulata. A cladistic morphological analysis was conducted to examine the utility of hard parts for reconstructing solenogaster phylogeny. Results indicate monophyly of Dondersia and Lyratoherpia as described here.
    Description: Major funding was by a U. S. National Science Foundation grant (DEB-9521930) under the PEET program (Partnerships for Enhancing Expertise in Taxonomy).
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 10
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    A natural history of the deep-sea aplacophoran Prochaetoderma yongei and its relationship to confamilials (Mollusca, Prochaetodermatidae) (2009)
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part II: Topical Studies in Oceanography 56 (2009): 1856-1864, doi:10.1016/j.dsr2.2009.05.026.
    Description: Previously published studies are woven together into a natural history of a deep-sea aplacophoran mollusc species, Prochaetoderma yongei Scheltema, 1985, and its confamilial species in the Prochaetodermatidae. This amphi-Atlantic species occurs in sometimes great numbers at upper bathyal depths, rivaling polychaetes in numerical dominance. It appears to be an opportunist, with wide geographic and depth distribution, rapid development from lecithotrophic larva to settlement and maturity, and omnivory. A short illustrated morphological description using characters useful for identifying all prochaetodermatid species should prove useful to nontaxonomists whose business is the deep-sea benthic fauna.
    Keywords: Distribution ; Spathoderma ; Collecting equipment ; Taxonomy ; Reproduction ; Feeding
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: application/pdf
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