scholarly journals Pharyngeal Teeth of Porgies

1959 ◽  
Vol 2 (2) ◽  
pp. 86-90 ◽  
Author(s):  
Sohiti ISOKAWA ◽  
Heiji ONUMA ◽  
Haruhiko YOSHIDA
Keyword(s):  
Pharyngeal Teeth

Telomerase Expression in Medaka (Oryzias melastigma) Pharyngeal Teeth

2017 ◽  
Vol 96 (6) ◽  
pp. 678-684 ◽  
Author(s):  
W.H. Tan ◽  
P.E. Witten ◽  
C. Winkler ◽  
D.W.T. Au ◽  
A. Huysseune
Keyword(s):  
Pharyngeal Teeth ◽  
Oryzias Melastigma

scholarly journals Sinorhodeus microlepis, a new genus and species of bitterling from China (Teleostei: Cyprinidae: Acheilognathinae)

Zootaxa ◽  
2017 ◽  
Vol 4353 (1) ◽  
pp. 69 ◽  
Author(s):  
FAN LI ◽  
TE-YU LIAO ◽  
RYOICHI ARAI ◽  
LIANGJIE ZHAO
Keyword(s):  
Yangtze River ◽  
New Genus ◽  
Mitochondrial Gene ◽  
New Genus And Species ◽  
Dorsal Fin ◽  
Chongqing City ◽  
White Spots ◽  
Pharyngeal Teeth ◽  
Fin Rays ◽  
Black Blotch

A new genus and species, Sinorhodeus microlepis gen. et sp. nov., is described from a tributary of the Yangtze River, in Chongqing City, China. Sinorhodeus gen. nov. can be distinguished from four closely related genera, Paratanakia, Pseudorhodeus, Rhodeus, and Tanakia, by the following combination of characters: pharyngeal teeth 0,0,4–4,0,0, longitudinal scales 41–46, white spots on dorsal-fin rays absent, a black blotch on dorsal fin in juvenile absent, and less developed wing-like yolk sac projections in larvae. Phylogenetic analysis of one mitochondrial gene and six nuclear genes supports the establishment of the new genus. 

The capitulum and feeding mechanism of Ixodes hexagonus Leach

Parasitology ◽  
1951 ◽  
Vol 41 (1-2) ◽  
pp. 66-81 ◽  
Author(s):  
D. R. Arthur
Keyword(s):  
Lower Surface ◽  
Tissue Reaction ◽  
Lower Wall ◽  
Feeding Mechanism ◽  
External Structure ◽  
Basal Lobe ◽  
Ixodes Hexagonus ◽  
Pharyngeal Muscles ◽  
Pharyngeal Teeth

1. The external structure of the capitulum of Ixodes hexagonus is described in detail, and the differences between it and the closely allied I. cookei are noted.2. The capitulum is divisible into two portions, an extra-basis and basis regions. The former is divided into the hypostomal groove, the labrohypostomal groove and the labro-hypostomal gutter. Internally the basis is divided into dorsal and ventral chambers by the subcheliceral plate. The dorsal chamber houses the chelicerae while the pharynx and the salivary ducts occupy the ventral portion.3. The so-called ‘stylet-like process’ is the anterior prolongation from the basal lobe of the labrum, and forms the mid-rib of a lamella which divides the hypostome into a dorsal salivary channel and a ventral food conduit.4. There are rows of teeth on the internal faces of the anterior fifth of the pharynx. Two series of pharyngeal muscles are present: (i) those having a dorsal attachment to the floor of the salivary chamber, and (ii) those having similar attachments to the subcheliceral plates.5. During feeding the first incision is made by the denticulate apices of the digits and into it the hypostome is then forced. Further cutting by the digits enables the hypostome to penetrate to its base. At the same time the palps splay out. The blood is then drawn up the food conduit by the action of the sucking pharynx. The lower surface of the labrum is produced into a tooth-like projection that fits into a groove of the lower wall of the pharynx. Presumably it functions as a valve to prevent regurgitation of blood. The pharyngeal teeth may function as a supplementary valvular apparatus or else serve for the breakdown of erythrocytes.6. The tissue reaction of a stoat's skin to penetration by the capitulum of I. hexagonus is described.

scholarly journals Scale and tooth phenotypes in medaka with a mutated ectodysplasin-A receptor: implications for the evolutionary origin of oral and pharyngeal teeth

2011 ◽  
Vol 73 (3) ◽  
pp. 139-148 ◽  
Author(s):  
A.D.S. Atukorala ◽  
Keiji Inohaya ◽  
Otto Baba ◽  
Makoto J. Tabata ◽  
R.A.R.K Ratnayake ◽  
...  
Keyword(s):  
Evolutionary Origin ◽  
Pharyngeal Teeth

The skeleton and pharyngeal teeth of zebrafish (Danio rerio) as a model of biomineralization in vertebrates

2006 ◽  
Vol 37 (6) ◽  
pp. 426-431 ◽  
Author(s):  
F. Neues ◽  
W. H. Arnold ◽  
J. Fischer ◽  
F. Beckmann ◽  
P. Gaengler ◽  
...  
Keyword(s):  
Danio Rerio ◽  
Pharyngeal Teeth

scholarly journals Feeding and trophic ecomorphology of Satanoperca pappaterra (Pisces, Cichlidae) in the Manso Reservoir, Mato Grosso State, Brazil

2005 ◽  
Vol 48 (6) ◽  
pp. 1007-1012 ◽  
Author(s):  
Norma Segatti Hahn ◽  
Fabiane Cunha
Keyword(s):  
Food Resources ◽  
Fish Scales ◽  
Benthic Organisms ◽  
Gill Rakers ◽  
Mato Grosso ◽  
Plant Remains ◽  
Pharyngeal Teeth ◽  
Chironomidae Larvae ◽  
The Relationship ◽  
Selection Of

The aim of this work was to evaluate the relationship between diet and features of the trophic ecomorphology of Satanoperca pappaterra (Heckel, 1840) in an impacted environment. Samples were collected from March 2000 to February 2003 in Manso Reservoir, Cuiabá River, Mato Grosso State. Analysis of 93 stomachs contents showed that food resources associated with the substrate, such as plant remains, detritus, fish scales and Chironomidae larvae, dominated the diet. Consequently this species was characterized as a detritivorous-invertivorous. However, individuals collected in 2003 showed a greater selection of benthic organisms in relation to previous periods. Morphological structures such as position of the mouth, form of the lips, gill rakers and pharyngeal teeth, in addition to the length of the intestine, showed specializations correlated with the diet. However, as long as the food was associated with the substrate, it seemed to be selected according to its abundance in the environment.

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