scholarly journals Development and growth of the pelvic fin in the extant coelacanth Latimeria chalumnae

2020 ◽  
Author(s):  
Rohan Mansuit ◽  
Gaël Clément ◽  
Anthony Herrel ◽  
Hugo Dutel ◽  
Paul Tafforeau ◽  
...  
Keyword(s):  
Latimeria Chalumnae ◽  
Pelvic Fin

scholarly journals The Complete DNA Sequence of the Mitochondrial Genome of a “Living Fossil,” the Coelacanth (Latimeria chalumnae)

Genetics ◽  
1997 ◽  
Vol 146 (3) ◽  
pp. 995-1010 ◽  
Author(s):  
Rafael Zardoya ◽  
Axel Meyer
Keyword(s):  
Mitochondrial Genome ◽  
Tandem Repeats ◽  
Phylogenetic Analyses ◽  
Large Data ◽  
Molecular Data ◽  
Phylogenetic Position ◽  
Data Set ◽  
Living Fossil ◽  
Latimeria Chalumnae ◽  
Relationship Of

The complete nucleotide sequence of the 16,407-bp mitochondrial genome of the coelacanth (Latimeria chalumnae) was determined. The coelacanth mitochondrial genome order is identical to the consensus vertebrate gene order which is also found in all ray-finned fishes, the lungfish, and most tetrapods. Base composition and codon usage also conform to typical vertebrate patterns. The entire mitochondrial genome was PCR-amplified with 24 sets of primers that are expected to amplify homologous regions in other related vertebrate species. Analyses of the control region of the coelacanth mitochondrial genome revealed the existence of four 22-bp tandem repeats close to its 3′ end. The phylogenetic analyses of a large data set combining genes coding for rRNAs, tRNA, and proteins (16,140 characters) confirmed the phylogenetic position of the coelacanth as a lobe-finned fish; it is more closely related to tetrapods than to ray-finned fishes. However, different phylogenetic methods applied to this largest available molecular data set were unable to resolve unambiguously the relationship of the coelacanth to the two other groups of extant lobe-finned fishes, the lungfishes and the tetrapods. Maximum parsimony favored a lungfish/coelacanth or a lungfish/tetrapod sistergroup relationship depending on which transversion:transition weighting is assumed. Neighbor-joining and maximum likelihood supported a lungfish/tetrapod sistergroup relationship.

scholarly journals Resurrection of the genus Homalopteroides (Teleostei: Balitoridae) with a redescription of H. modestus (Vinciguerra 1890)

Zootaxa ◽  
2012 ◽  
Vol 3586 (1) ◽  
pp. 329 ◽  
Author(s):  
ZACHARY S. RANDALL ◽  
LAWRENCE M. PAGE
Keyword(s):  
Lateral Line ◽  
Head Length ◽  
Pectoral Fin ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Interorbital Width ◽  
Fin Rays ◽  
Orbital Rim ◽  
Pectoral Fin Rays ◽  
Pelvic Fin

The genus Homalopteroides Fowler 1905 is resurrected and distinguished from the genus Homaloptera van Hasselt 1823based on a combination of characters including a unique mouth morphology, dorsal-fin origin over pelvic fin,≤60 lateral-line scales, and≤30 predorsal scales. Species included in Homalopteroides are H. wassinkii (Bleeker 1853), H. modestus(Vinciguerra 1890), H. rupicola (Prashad & Mukerji 1929), H. smithi (Hora 1932), H. stephensoni (Hora 1932), H. weberi(Hora 1932), H. tweediei (Herre 1940), H. indochinensis (Silas 1953), H. nebulosus (Alfred 1969), H. yuwonoi (Kottelat1998), and possibly H. manipurensis (Arunkumar 1999). Homalopteroides modestus (Vinciguerra 1890) is a poorlyknown species that was originally described from the Meekalan and Meetan rivers of southern Myanmar. It occurs in theSalween, Mae Khlong, and Tenasserim basins, and can be distinguished from all other species of Homalopteroides by thecombination of caudal-fin pattern (black proximal and distal bars, median blotch), 15 pectoral-fin rays, pectoral-fin lengthgreater than head length, 5½–6½ scales above and 5–6 scales below the lateral line (to the pelvic fin), 39–44 total lateral-line pores, no axillary pelvic-fin lobe, pelvic fin not reaching anus, orbital length less than interorbital width in adult, and maxillary barbel reaching to or slightly past the anterior orbital rim.

Redescription of Mugil setosus Gilbert 1892 with comments on the occurrence of Mugil curema Valenciennes 1836 in the Pacific Ocean (Teleostei: Perciformes: Mugilidae)

Zootaxa ◽  
2019 ◽  
Vol 4671 (3) ◽  
pp. 396-406
Author(s):  
RICARDO BRITZKE ◽  
NAÉRCIO A. MENEZES ◽  
MAURO NIRCHIO
Keyword(s):  
Pacific Ocean ◽  
Pacific Coast ◽  
The Third ◽  
Dorsal Fin ◽  
The Pacific ◽  
Fin Rays ◽  
The Pacific Ocean ◽  
The Western Pacific ◽  
Pectoral Fin Rays ◽  
Pelvic Fin

Mugil setosus Gilbert 1892 was originally described by Gilbert based on specimens from Clarion Island, in the western and most remote of the Revillagigedo Islands, about 1,000 km off the western Pacific coast of Mexico. Examination of the type of material and recently collected specimens from Ecuador and Peru, resulted in the redescription provided herein. Diagnostic characters of the species were mainly: tip of the pelvic fin reaching beyond the vertical through the base of the third dorsal-fin spine, the pectoral-fin rays with ii+13–14 rays, the anterodorsal tip of second (soft) dorsal fin uniformly dark, and an external row of larger teeth, and more internally a patch of scattered smaller teeth, visible mainly in adults 150 mm SL. The expansion of geographic distribution of Mugil setosus and occurrence of Mugil curema Valenciennes 1836 in the Pacific Ocean are discussed. 

Habitat and population size of the coelacanth Latimeria chalumnae at Grand Comoro

1991 ◽  
Vol 32 (1-4) ◽  
pp. 287-300 ◽  
Author(s):  
Hans Fricke ◽  
Karen Hissmann ◽  
J�rgen Schauer ◽  
Olaf Reinicke ◽  
Lutz Kasang ◽  
...  
Keyword(s):  
Population Size ◽  
Latimeria Chalumnae

scholarly journals The gills of the coelacanth,Latimeria chalumnae Latimeriidae.What can they teach us?

1998 ◽  
Vol 65 (sup1) ◽  
pp. 425-429 ◽  
Author(s):  
George M. Hughes
Keyword(s):  
Latimeria Chalumnae

Nothing in excess is good: Double pelvic fin malformation in the wild‐caught hill stream loach, Indoreonectes evezardi (Day, 1872) from biodiversity hotspot of India

2021 ◽  
Vol 37 (2) ◽  
pp. 326-330
Author(s):  
Chandani R. Verma ◽  
Pradeep Kumkar ◽  
Sachin M. Gosavi ◽  
Lukáš Kalous
Keyword(s):  
Biodiversity Hotspot ◽  
In The Wild ◽  
Pelvic Fin

Les premiers stades de la formation de l'ébauche de nageoire pelvienne de Truite (Salmo fario et Salmo gairdneri)

Development ◽  
1973 ◽  
Vol 29 (1) ◽  
pp. 221-237
Author(s):  
J. Geraudie ◽  
Y. François
Keyword(s):  
Basement Membrane ◽  
Hind Limb ◽  
Anatomical Study ◽  
Limb Bud ◽  
Salmo Gairdneri ◽  
Mucous Cells ◽  
Double Origin ◽  
Pelvic Fin

The first stages of genesis of the pelvic fin Anlage in the Trout (Salmo fario and S. gairdneri). I. Anatomical study The Anlage of the pelvic fins appears in Salmo 2 weeks after the fecundation day, at the level of the somites 23–26. The mesoderm has a double origin and seems to differ in this regard from the hind limb of most of the amniotes. The ‘initial mesenchyme’ comes from the local proliferation of the somatopleura. It will give essentially the skeletal components of dermal origin (actinotrichia and lepidotrichia). The ‘secondary mesenchyme’ is obtained by the dispersion of four ventral somitic processes that have reached and entered the initial mesenchyme blastema. The secondary mesenchyme will probably give the muscles and also the endoskeleton of the fin. The origin of the girdle is not clear. When the setting of the initial mesenchyme begins the epithelium that covers the embryo is already differentiated in an epiderm with numerous mucous cells resting on a visible basement membrane. At the apex of the pelvic bud, a localized and transitory thickening of the epiderm is produced by the increase in the height of the basal stratum. We call this structure by the name of ‘pseudo apical cap’ to stress the fact that it must be distinguished from the ‘apical cap’ described for the limb bud of amniotes. So, the morphogenesis of the pelvic fins of Salmo shows some important particularities in the epiderm as well as in the mesoderm.

A new species of Glyptothorax (Teleostei: Sisoridae) from the Brahmaputra River basin, Arunachal Pradesh, India

Zootaxa ◽  
2021 ◽  
Vol 5023 (2) ◽  
pp. 239-250
Author(s):  
LAISHRAM KOSYGIN ◽  
PRATIMA SINGH ◽  
SHIBANANDA RATH
Keyword(s):  
River Basin ◽  
Indian Subcontinent ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
Northeast India ◽  
Arunachal Pradesh ◽  
Brahmaputra River ◽  
Body Depth ◽  
Pectoral Spine ◽  
Pelvic Fin

Glyptothorax rupiri, a new sisorid catfish, is described from the Brahmaputra River basin in Arunachal Pradesh, northeast India. It differs from its congeners in the Indian subcontinent by the following combination of characters: the presence of plicae on the ventral surface of the pectoral spine and first pelvic-fin ray; a posteriorly serrated dorsal-fin spine, its length 11.3–12.2% SL; body depth at anus 11.2–13.4% SL; a thoracic adhesive apparatus longer than broad, with a V-shaped median depression which opens posteriorly; an arrow-shaped anterior nuchal plate element; adipose-fin base length 10.9–12.6% SL; nasal barbel not reaching anterior orbital margin; 14–18 serrae on posterior margin of the pectoral-fin spine; body with two longitudinal pale-cream stripes; densely tuberculated skin; and the presence of numerous tubercles on the dorsal surface of pectoral and pelvic-fin rays.  

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