Results 121 to 130 of about 522 (154)
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One or Three Gyrocotylideans (Platyhelminthes) in Chimaera monstrosa (Holocephali)?
The Journal of Parasitology, 1986Between October 1981 and October 1984 1,136 Chimaera monstrosa from Norwegian waters harbored 1,361 gyrocotylideans. Fifteen were initially identified as Gyrocotyloides nybelini Fuhrmann, 1930, 33 as Gyrocotyle confusa van der Land and Dienske, 1968 and the remainder as Gyrocotyle urna Grube and Wagener in Wagener, 1852.
Judith A. Colin +2 more
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The fine structure of spermatozoa of Hydrolagus colliei (Chondrichthyes, Holocephali)
Journal of Ultrastructure Research, 1983The ultrastructure of spermatozoa in Hydrolagus colliei is described. Basic similarities of structure to the sperm of the related elasmobranch fish are noted. The most significant features of sperm structure in Hydrolagus that differ from those of elasmobranch fish occur in the tail.
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The cardiac ultrastructure of Chimaera monstrosa L. (Elasmobranchii: Holocephali)
Cell and Tissue Research, 1979The ultrastructure of the heart in Chimaera monstrosa L. is described. The endocardial and the epicardial cells are similar in the three cardiac regions. Myocardial cells show small variations. The myofibred, 4--6 microns thick, contains one or a few myofibrils. Each myosin filament is surrounded by six actin filaments.
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Note on the terminal nerve in chimaeroid fishes (Holocephali; Chimaeridae)
2012William Locy in 1905 on page 63 of his morphological and embryological account “On a newly recognized nerve connected to the fore-brain of selachians” mentions the “new nerve” or “supernumerary nerve” as it was termed before that time, tentatively traced upon dissection of the brain of Chimaera monstrosa.
Licht, Martin, Bartsch, Peter
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Funktionsmorphologie der Nase vonChimaera monstrosa (Holocephali)
Zeitschrift für Morphologie der Tiere, 1973Die vorliegenden Untersuchungen an der SeekatzeChimaera monstrosa behandeln die Funktionsmorphologie des nasolabialen Systems und die makroskopische Struktur des Geruchsorgans. 2. Die beiden auseren Offnungen der Nase liegen unmittelbar anteromedian zur Oberlippe und sind nur durch ein schmales Septum getrennt. 3.
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Assessment of the dorsal fin spine for chimaeroid (Holocephali: Chimaeriformes) age estimation
Journal of Fish Biology, 2009Previous attempts to age chimaeroids have not rigorously tested assumptions of dorsal fin spine growth dynamics. Here, novel imaging and data‐analysis techniques revealed that the dorsal fin spine of the spotted ratfish Hydrolagus colliei is an unreliable structure for age estimation.
L A K, Barnett +2 more
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Journal of Morphology, 1998
The development of Callorhinchus milii, a primitive chondrichthyan fish (Subclass Holocephali) is described in detail based on a complete series of embryos from stage 17 to hatching. The external features of these specimens, in comparison with other chondrichthyan embryos, are used to establish the first staging table for any chimaeroid species.
Elizabeth E Leclair
exaly +3 more sources
The development of Callorhinchus milii, a primitive chondrichthyan fish (Subclass Holocephali) is described in detail based on a complete series of embryos from stage 17 to hatching. The external features of these specimens, in comparison with other chondrichthyan embryos, are used to establish the first staging table for any chimaeroid species.
Elizabeth E Leclair
exaly +3 more sources
Tissue and Cell, 1984
A histochemical, microdensitometric, and electron microscopic study of testes of the ratfish Hydrolagus colliei shows that an instance of the rare phenomenon of germ line chromatin diminution occurs in this vertebrate species. In primary spermatocytes at metaphase I a spherical mass of heterochromatin accumulates at one side of the metaphase plate.
H P, Stanley, H E, Kasinsky, N C, Bols
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A histochemical, microdensitometric, and electron microscopic study of testes of the ratfish Hydrolagus colliei shows that an instance of the rare phenomenon of germ line chromatin diminution occurs in this vertebrate species. In primary spermatocytes at metaphase I a spherical mass of heterochromatin accumulates at one side of the metaphase plate.
H P, Stanley, H E, Kasinsky, N C, Bols
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On the ultrastructure of the sinus venosus in Chimara monstrosa L. (Elasmobranchii: Holocephali)
Zoomorphology, 1980The wall of the sinus venosus in an elasmobranchian species, Chimaera monstrosa L. is described.
Ingvar Leiv Leknes +1 more
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A survey of the metazoan parasites of the rabbit-fish, Chimaera monstrosa L. (Holocephali)
Journal of Sea Research, 1968exaly +2 more sources