Comparative Morphology of the Concave Mirror Eyes of Scallops (Pectinoidea)*

@inproceedings{Speiser2008ComparativeMO,
  title={Comparative Morphology of the Concave Mirror Eyes of Scallops (Pectinoidea)*},
  author={Daniel I. Speiser and S{\"o}nke Johnsen},
  year={2008}
}
Abstract The unique, double-retina, concave mirror eyes of scallops are abundant along the valve mantle margins. Scallops have the most acute vision among the bivalve molluscs, but little is known about how eyes vary between scallop species. We examined eye morphology by immunofluorescent labeling and confocal microscopy and calculated optical resolution and sensitivity for the swimming scallops Amusium balloti (Bernardi, 1861), Placopecten magellenicus (Gmelin, 1791), Argopecten irradians… 

Three-dimensional reconstructions of pallial eyes in Pectinidae (Mollusca: Bivalvia)

TLDR
It is shown how morphological characteristics such as the hyperbolic shape of the lens can be overlooked if only single sections are investigated and how three-dimensional reconstructions of microtome sections enable the comparison of whole eyes and structures in contrast to single-section analysis.

Radiolar Eyes of Serpulid Worms (Annelida, Serpulidae): Structures, Function, and Phototransduction

TLDR
The potential for a shared evolutionary lineage between the radiolar photoreceptors of serpulids and sabellids is explored and these unique innovations in the broader context of metazoan eye evolution are considered.

The ocelli of Archaeognatha (Hexapoda): functional morphology, pigment migration and chemical nature of the reflective tapetum

TLDR
The ocelli of the jumping bristletail Machilis hrabei have a reflective tapetum containing xanthine crystals, which has a dynamic range of approximately 4 log units and is maximally sensitive to green light.

Systematic Differences in Eye Numbers between the Left and Right Valves of the Sea Scallop Placopecten magellanicus: an Evolutionary Response for Visualizing the Water Column?

TLDR
It is found that larger scallops had significantly more eyes than their smaller conspecifics, although eye addition occurred only on the upper mantle, consistent with predictions of an adaptive evolutionary response in eye numbers driven by the need for visualizing objects in the water column.

Scallops visually respond to the size and speed of virtual particles

TLDR
Because scallops must open their anterior mantle gapes to feed, the findings suggest that these animals may visually detect the size and speed of moving particles and use this information to help identify favorable feeding conditions.

Primary Inhibition by Light: A Unique Property of Bivalve Photoreceptors*

TLDR
The inhibitory response is universal in bivalve photoreception, unique among the eyes of invertebrates, but similar in polarity to chordate photoreceptors although the ionic mechanisms are different.

Spectral sensitivity of the concave mirror eyes of scallops: potential influences of habitat, self-screening and longitudinal chromatic aberration

TLDR
It is concluded that environment may influence the λmax of scallop visual pigments: P. magellanicus, generally found in blue oceanic water, has visual Pigments that are maximally sensitive to shorter wavelengths than those found in A. irradians, which lives in greener inshore water.

Mantle margin morphogenesis in Nodipecten nodosus (Mollusca: Bivalvia): new insights into the development and the roles of bivalve pallial folds

TLDR
Analysis of the mantle margin of the scallop Nodipecten nodosus shows that the middle mantle fold forms from the outer surface of the inner fold after metamorphosis and that the initial unfolded mantle margin may represent a common condition among bivalves.

Uncovering a gene duplication of the photoreceptive protein, opsin, in scallops (Bivalvia: Pectinidae).

TLDR
The identification of two highly divergent Gq-opsin genes in scallops is valuable for future functional investigations and provides a foundation for further study of a morphologically and ecologically diverse clade of bivalves that has been understudied with respect to visual ecology and diversification of opsin.

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