scholarly journals Developmental and architectural principles of the lateral-line neural map

2013 ◽  
Vol 7 ◽  
Author(s):  
Jesús Pujol-Martí ◽  
Hernán López-Schier
Keyword(s):  
Lateral Line ◽  
Architectural Principles

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

Scanning Electron Microscopy of Fish Scales as an Adjunctive Aid in Speciation

1972 ◽  
Vol 30 ◽  
pp. 394-395
Author(s):  
Edward D. DeLamater ◽  
Walter R. Courtenay ◽  
Cecil Whitaker
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Lateral Line ◽  
Species Differences ◽  
Fish Scale ◽  
Fish Scales ◽  
Anterior Border ◽  
The University ◽  
Multiple Holes ◽  
Scanning Electron

Comparative scanning electron microscopy studies of fish scales of different orders, families, genera and species within genera have demonstrated differences which warrant elaboration. These differences in detail appear to be sufficient to act as “fingerprints”, at least, for family differences. To date, the lateral line scales have been primarily studied. These demonstrate differences in the lateral line canals; the pattern of ridging with or without secondary protuberances along the edges; the pattern of spines or their absence on the anterior border of the scales; the presence or absence of single or multiple holes on the ventral and dorsal sides of the lateral line canal covers. The distances between the ridges in the pattern appear likewise to be important.A statement of fish scale structure and a comparison of family and species differences will be presented.The authors wish to thank Dr. Donald Marzalek and Mr. Wallace Charm of the Marine and Atmospheric Laboratory of the University of Miami and Dr. Sheldon Moll and Dr. Richard Turnage of AMR for their exhaustive help in these preliminary studies.

Discovering Architecture

2017 ◽  
Author(s):  
Matthew Walker
Keyword(s):  
Early Modern ◽  
Ancient World ◽  
Ancient Athens ◽  
Early Modern English ◽  
Degree Of Confidence ◽  
Architectural Principles ◽  
The Subject ◽  
Architectural Knowledge

This chapter deals with the genesis of architectural knowledge. In particular, it explores those rare moments when early modern English authors wrote about newly discovered examples of ancient architecture, the most important forms of architectural knowledge that existed. I will discuss three such accounts (all published in the Philosophical Transactions) of Roman York, Palmyra, and ancient Athens. These three texts share a preoccupation with truth and accuracy, as befitted the task of communicating highly sought-after architectural knowledge. They also demonstrate the degree of confidence of English writers in this period, not only in how they interpreted ancient architecture, but also in how they sought to criticize previous European authors on the subject. But most importantly, these texts reveal the extent of English intellectuals’ knowledge of the architectural principles of the ancient world and how that knowledge was in a state of flux.

scholarly journals Redescription of Astyanax goyacensis Eigenmann, 1908 (Ostariophysi: Characiformes: Characidae)

2009 ◽  
Vol 7 (3) ◽  
pp. 371-376 ◽  
Author(s):  
Valdener Garutti ◽  
Francisco Langeani
Keyword(s):  
Lateral Line ◽  
Species Complex ◽  
Color Pattern ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Black Stripe ◽  
Conspicuous Feature ◽  
Fin Rays ◽  
Shape Pattern ◽  
Eye Diameter

Astyanax goyacensis Eigenmann, 1908 is redescribed based on the holotype and 25 topotypes. The species belongs to the A. bimaculatus species complex, sharing with those species a black, horizontally ovate, humeral spot (the most conspicuous feature of this complex), two diffuse vertical brown bars in the humeral area (the first through humeral spot and the second 2-3 scales behind), and black medium caudal-fin rays. Furthermore, A. goyacensis possesses a black stripe extending along midlateral body portion, more conspicuous in alcohol preserved specimens. These characteristics allow its inclusion in the putative "black lateral stripe" sub-group of A. bimaculatus species complex. From the species of this complex it differs by the black lateral stripe shape, pattern of chromatophores on the flank, coloration of the caudal fin, scales on the lateral line, branched rays on anal fin, eye diameter, and caudal peduncle depth. Comments about the color pattern in Astyanax bimaculatus species complex are added.

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