open access

Vol 76, No 2 (2017)
ORIGINAL ARTICLES
Published online: 2016-11-04
Submitted: 2016-09-08
Accepted: 2016-10-06
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Morphological characteristics of visual cells in the endemic Korean loach Kichulchoia multifasciata (Pisces; Cobitidae) by microscopy

J. G. Kim, J. Y. Park
DOI: 10.5603/FM.a2016.0072
·
Pubmed: 27813623
·
Folia Morphol 2017;76(2):186-190.

open access

Vol 76, No 2 (2017)
ORIGINAL ARTICLES
Published online: 2016-11-04
Submitted: 2016-09-08
Accepted: 2016-10-06

Abstract

The visual cell of the retina in the Korean loach Kichulchoia multifasciata, a bottom-dwelling freshwater loach in shallow water, contains double cones and large rods. With light microscopy, the cones form a row mosaic pattern in which the partners of double cones are linearly oriented with a large rod. In a double cone or twin cone, the two members are unequal such that one cone may be longer than the other. An anatomical unit is apparent which consists of 5 rod cells and 15 double cone cells per 20 × 20 μm area. We found that the cone cells of outer segments are linked to the inner segment by so-called “calyceal process” using a scanning electron microscopy, unlike rod cells. In the transmission electron microscopy, the outer membrane shows piles of membrane discs surrounded by double membranes.  

Abstract

The visual cell of the retina in the Korean loach Kichulchoia multifasciata, a bottom-dwelling freshwater loach in shallow water, contains double cones and large rods. With light microscopy, the cones form a row mosaic pattern in which the partners of double cones are linearly oriented with a large rod. In a double cone or twin cone, the two members are unequal such that one cone may be longer than the other. An anatomical unit is apparent which consists of 5 rod cells and 15 double cone cells per 20 × 20 μm area. We found that the cone cells of outer segments are linked to the inner segment by so-called “calyceal process” using a scanning electron microscopy, unlike rod cells. In the transmission electron microscopy, the outer membrane shows piles of membrane discs surrounded by double membranes.  

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Keywords

retina, rods, double cones, row mosaic, cobitidae

About this article
Title

Morphological characteristics of visual cells in the endemic Korean loach Kichulchoia multifasciata (Pisces; Cobitidae) by microscopy

Journal

Folia Morphologica

Issue

Vol 76, No 2 (2017)

Pages

186-190

Published online

2016-11-04

DOI

10.5603/FM.a2016.0072

Pubmed

27813623

Bibliographic record

Folia Morphol 2017;76(2):186-190.

Keywords

retina
rods
double cones
row mosaic
cobitidae

Authors

J. G. Kim
J. Y. Park

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