Reproductive ecology of the brooding, hermaphroditic clam Lasaea subviridis

Beauchamp, Katherine A.

doi:10.1007/bf00508260

Cited by 19 publications

(41 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Oldfield (1955) described the inner organization of the adult L. rubra and subsequently (Oldfield, 1964) also made observations of the larva, but did not apply electron microscopy or immunocytochemical tracing methods. The fine structure of sperm cells of L. subviridis has been published by Ó Foighil (1985), and Beauchamp (1986) collected information on the reproductive ecology of the same species.…”

mentioning

confidence: 99%

Larval morphology of the brooding clam Lasaea adansonii (Gmelin, 1791) (Bivalvia, Heterodonta, Galeommatoidea)

Altnöder

Haszprunar

2008

Journal of Morphology

View full text Add to dashboard Cite

The strongly modified mode of development of the small and brooding galeommatoid bivalve Lasaea adansonii (Gmelin, 1791) [syn. Lasaea rubra (Montagu, 1803)] has been studied by means of transmission and scanning electron microscopy and by fluorescent staining of the muscular system and of two neurotracers, FMRFamide and serotonin. In addition, two developmental stages were visualized using computer-aided 3D-reconstruction. All larval stages of L. adansonii lack ciliary rings. The apical organ appears invaginated: the base of the duct contacts the cerebral ganglia and opens on the preoral region. Larval protonephridia are lacking. The adult kidneys develop independently of the pericardial cavity and contain a protonephridial part that enables excretory function until the pericardium is formed. The larval muscular system is composed of smooth muscle fibers; striated fibers are lacking. Posteriorly and immediately below the ligament, a paired cell of unknown function is present that contains serotonin and FMRFamide. In summary, L. adansonii exhibits the direct mode of development. Only few truly larval structures (e.g., the modified apical organ) are elaborated.

show abstract

mentioning

confidence: 99%

Larval morphology of the brooding clam Lasaea adansonii (Gmelin, 1791) (Bivalvia, Heterodonta, Galeommatoidea)

Altnöder

Haszprunar

2008

Journal of Morphology

View full text Add to dashboard Cite

show abstract

“…Branchial incubation also shows considerable structural diversity among bivalves (for a review, see Sellmer 1967; Mackie 1984). In the simplest case, reported for Lasaea (Beauchamp 1986), Eupera, Corbicula , and Neocorbicula (= Cyanocyclas ) (Ituarte 1984, 1994), embryos are retained within non‐modified branchial water tubes. A structurally more complex case is found in Pisidium (Burch 1975), in which a brood sac derived from the descending filaments of the inner demibranchs of each gill contains several developing embryos, each one protected within an individual chamber.…”

Section: Discussionmentioning

confidence: 99%

Unusual modes of oogenesis and brooding in bivalves: the case of Gaimardia trapesina (Mollusca: Gaimardiidae)

Ituarte¹

2009

Invertebrate Biology

View full text Add to dashboard Cite

Abstract. I describe an unusual case of follicular oogenesis in a bivalve, Gaimardia trapesina, a common marine bivalve from the Magellan Region and adjacent Sub‐Antarctic waters, whose members brood their developing larvae. The gonad in G. trapesina is an acinus organ that infiltrates the perivisceral connective tissue; the walls of the acini are formed by tall, slender cells with distal nuclei, supported by a thin conjunctive tissue layer. At the onset of vitellogenesis, each developing oocyte becomes surrounded by a one‐cell‐thick layer of follicle cells, which may originate from the wall of the acinus. The cells form a follicle that completely encompasses single oocytes, except at the basal zone, where oocytes are in contact with the acinus wall. The follicle persists beyond the end of vitellogenesis and spawning. After gamete release, the persistent follicle participates in the attachment of ova and developing embryos to the interfilamental junctions of the inner and outer demibranchs of the gill, where embryos are incubated until hatching as late‐stage pediveliger larvae. Ripe eggs are large (∼250 μm diameter), suggesting that development is entirely lecithotrophic. The follicle cells that mediate connections between developing embryos and the maternal individual probably have a mechanical role only, providing support and possibly facilitating the accommodation of a large number of embryos to maximize the branchial space available for brooding.

show abstract

“…These minute, hermaphroditic, crevicedwelling bivalves occur on most rocky shores worldwide (Beauchamp, 1986;0 Foighil, 1989). Apart from Lusaea australis (Lamarck,18 18), karyologically-characterized Lasaea populations (from the northeastern Pacific, northeastern Atlantic, Mediterranean, and the southern Indian Ocean) are composed of highly polyploid clonal lineages, many of which display supernumerary chromosomes (0 Foighil, 1988;Tyler-Walters & Crisp, 1989;Thiriot-Quitvreux, 1992; Thiriot-Quitvreux et al., 1988, 19890 Foighil & Thiriot-Quitvreux, 199 1;Thiriot-Quikvreux, unpubl.…”

Section: Introductionmentioning

confidence: 99%

Sympatric Australian Lasaea species (Mollusca: Bivalvia) differ in their ploidy levels, reproductive modes and developmental modes

Foighil¹,

Thiriot-Quiévreux²

1999

Zoological Journal of the Linnean Society

View full text Add to dashboard Cite

The cosmopolitan marine bivalve genus kisaea is predominantly composed of highly polyploid asexual lineages with one exception: the diploid, sexual Australian species L. australis. Two undescribed, direct-deireloping congeners co-occur with the indirect-developing L. austruliJ on the rocky intertidal of southeastern Australia. One of these, L. colmani sp. nov., is also diploid and sexual. The other direct-developing congener is an asexual polyploid composed of a variety of clonal lineages. All three sympatric Australian h a e a congeners are morphologically distinguishable, although prodissoconch distinctions are required to separate large polyploid clams from equivalently-sized L. australis. Similarities in mitochondria1 gene sequence and in shell morphology suggest that L. australis and the Australian sytnpatric polyploid clones share an exclusive common ancestor despite differing in developmental mode, ploidy and reproductive mode. However, detailed karyological analyses failed to identify a chromosome set morphologically similar to that of L. australis among the sympatric Australian polypoid complement. We propose that generation of the polyploid Australian clones (presumably by hybridization) was followed by radical karyological rearrangement. 0 I999 The Linnean Socier) of London ADDITIONAL

show abstract

Reproductive ecology of the brooding, hermaphroditic clam Lasaea subviridis

Cited by 19 publications

References 20 publications

Larval morphology of the brooding clam Lasaea adansonii (Gmelin, 1791) (Bivalvia, Heterodonta, Galeommatoidea)

Larval morphology of the brooding clam Lasaea adansonii (Gmelin, 1791) (Bivalvia, Heterodonta, Galeommatoidea)

Unusual modes of oogenesis and brooding in bivalves: the case of Gaimardia trapesina (Mollusca: Gaimardiidae)

Sympatric Australian Lasaea species (Mollusca: Bivalvia) differ in their ploidy levels, reproductive modes and developmental modes

Contact Info

Product

Resources

About