Organization of the catecholaminergic systems in two basal actinopterygian fishes, Polypterus senegalus and Erpetoichthys calabaricus (Actinopterygii: Cladistia)

2018 ◽  
Vol 527 (2) ◽  
pp. 437-461 ◽  
Author(s):  
Jesús M. López ◽  
Daniel Lozano ◽  
Ruth Morona ◽  
Agustín González
Keyword(s):  
Actinopterygian Fishes ◽  
Polypterus Senegalus

Some new and known species of Bomolochidae (Copepoda, Cyclopoida) parasitic on Japanese actinopterygian fishes, 3

Crustaceana ◽  
2021 ◽  
Vol 94 (4) ◽  
pp. 447-465
Author(s):  
Kunihiko Izawa
Keyword(s):  
Male Specimen ◽  
Actinopterygian Fishes ◽  
Dorsal Process ◽  
First Time ◽  
Respective Species ◽  
Copepoda Cyclopoida

Abstract Orbitacolax bispinus sp. nov., Orbitacolax leptoscari (Yamaguti, 1953), Paraorbitacolax sphyraenae Izawa, 2021, and one male specimen of a Bomolochidae sp. are (re)described. The male and copepodid V female of O. leptoscari, and the male and copepodid V male of P. sphyraenae are described for the first time for the respective species. A description performed in Izawa (2020, 2021) that the maxilliped of the female bears a dorsal process in Orbitacolax and Paraorbitacolax spp., was wrong and is herein corrected.

Pectoral and Pelvic Muscles of Actinopterygian Fishes

2018 ◽  
pp. 293-304
Author(s):  
Rui Diogo ◽  
Janine M. Ziermann ◽  
Julia Molnar ◽  
Natalia Siomava ◽  
Virginia Abdala
Keyword(s):  
Actinopterygian Fishes ◽  
Pelvic Muscles

scholarly journals Neuroanatomical Distribution of the Serotonergic System in the Brain and Retina of Holostean Fishes, The Sister Group to Teleosts

2020 ◽  
Vol 95 (1) ◽  
pp. 25-44
Author(s):  
Daniel Lozano ◽  
Agustín González ◽  
Jesús M. López
Keyword(s):  
Spinal Cord ◽  
Preoptic Area ◽  
Area Postrema ◽  
Sister Group ◽  
Brain Regions ◽  
Serotonergic System ◽  
Paraventricular Organ ◽  
Cell Groups ◽  
Actinopterygian Fishes ◽  
The Brain

Among actinopterygian fishes, holosteans are the phylogenetically closest group to teleosts but they have been much less studied, particularly regarding the neurochemical features of their central nervous system. The serotonergic system is one of the most important and conserved systems of neurotransmission in all vertebrates. By means of immunohistochemistry against serotonin (5-hydroxytryptamine), we have conducted a comprehensive and complete description of this system in the brain and retina of representative species of the 3 genera of holostean fishes, belonging to the only 2 extant orders, Amiiformes and Lepisosteiformes. Serotonin-immunoreactive cell groups were detected in the preoptic area, the hypothalamic paraventricular organ, the epiphysis, the pretectal region, the long and continuous column of the raphe, the spinal cord, and the inner nuclear layer of the retina. Specifically, the serotonergic cell groups in the preoptic area, the epiphysis, the pretectum, and the retina had never been identified in previous studies in this group of fishes. Widespread serotonergic innervation was observed in all main brain regions, but more abundantly in the subpallium, the hypothalamus, the habenula, the optic tectum, the so-called cerebellar nucleus, and the area postrema. The comparative analysis of these results with those in other groups of vertebrates reveals some extremely conserved features, such as the presence of serotonergic cells in the retina, the pineal organ, and the raphe column, while other characteristics, like the serotonergic populations in the preoptic area, the paraventricular organ, the pretectum, and the spinal cord are generally present in all fish groups, but have been lost in most amniotes.

Sign in / Sign up

Export Citation Format

Share Document