Studies on Chilodonella cyprini and C. hexasticha (Protozoa, Ciliata) by scanning electron microscopy

1985 ◽  
Vol 63 (10) ◽  
pp. 2483-2487 ◽  
Author(s):  
M. Wiles ◽  
D. K. Cone ◽  
P. H. Odense
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Nova Scotia ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Carassius Auratus ◽  
General Morphology ◽  
Goldfish Carassius Auratus ◽  
Scanning Electron

Specimens of the kinetophragminophorid ciliates Chilodonella cyprini (Moroff, 1902) from goldfish (Carassius auratus) in Nova Scotia and Chilodonella hexasticha (Kiernik, 1909) from channel catfish (Ictalurus punctatus) in Arkansas were examined by scanning electron microscopy. They are round to foliate, ventrally flattened protozoa well suited for adherence to, and movement over, a flat host surface. Organelles including ventral ciliary rows, dorsal cilia, excretory pores, and a prominent cytopharynx are described. Dorsal surfaces of both species have a distinct reticulate pattern which represents a modification of the pellicle. Ventrolateral margins of C. cyprini contain rows of short cuticular proturberances not seen in C. hexasticha. Our specimens of the two species were distinguished by their total ventral ciliary row number (12–14 in C. hexasticha, 21 in C. cyprini). General morphology as revealed by scanning electron microscopy is compared with previous light microscopical observations. The taxonomic separation of the two species, C. cyprini and C. hexasticha, is confirmed.

scholarly journals General morphology of the oral cavity of the Nile crocodile, Crocodylus niloticus (Laurenti, 1768). I. Palate and gingivae

2003 ◽  
Vol 70 (4) ◽  
Author(s):  
J.F. Putterill ◽  
J.T. Soley
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Connective Tissue ◽  
Taste Receptors ◽  
General Morphology ◽  
Histological Features ◽  
Microscopic Features ◽  
Sensory Structures ◽  
Nile Crocodile ◽  
Scanning Electron

The heads of nine 2.5 to 3-year-old Nile crocodiles (Crocodylus niloticus) were obtained from a commercial farm where crocodiles are raised for their skins and meat. The animals from which these specimens originated were clinically healthy at the time they were slaughtered. A detailed description of the macroscopic and microscopic features of the palate and gingivae of the Nile crocodile is presented and the results are compared with published information on this species and other Crocodylia. The histological features are supplemented by information supplied by scanning electron microscopy. Macroscopic features of interest are the small conical process situated at the base of the first two incisors of the maxilla, the distribution of cobbled units on the palate, and the broad dentary shelf forming the rostral aspect of the mandible. Histologically the palate and gingivae did not differ significantly from each other and both regions showed a presence of Pacinian-type corpuscles. Two types of sensory structures (taste receptors and pressure receptors) were identified in the regions examined, both involving modification of the epithelium and the underlying connective tissue.

Scanning electron microscopy of the collar region of Deropristis inflata and Echinostoma revolutum

1999 ◽  
Vol 73 (1) ◽  
pp. 51-57 ◽  
Author(s):  
I. Kanev ◽  
B.S. Dezfuli ◽  
M. Nestorov ◽  
B. Fried
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ventral Sucker ◽  
Oral Sucker ◽  
The Body ◽  
General Morphology ◽  
Collar Region ◽  
Echinostoma Revolutum ◽  
Left And Right ◽  
Scanning Electron

Scanning electron microscopy (SEM) was used to study the collar region of Deropristis inflata (Molin, 1858), an intestinal digenean of fish, and Echinostoma revolutum (Froelich, 1802), an intestinal digenean of birds. The results showed basic differences in the following morphological features. The collar of D. inflata was open ventrally and dorsally whereas that of E. revolutum was closed dorsally and ventrally, forming a kidney-like ring. The collar of D. inflata was located posterior to the oral sucker, some distance behind the anterior end of the body. That of E. revolutum was located terminally around the oral sucker. The collar of D. inflata had numerous collar spines which varied in size, shape and position. That of E. revolutum had 37 collar-spines, mainly homogenous in their general morphology and with a typical arrangement pattern for 37-collar-spined echinostomes. The collar of D. inflata had few tegumentary papillae whereas that of E. revolutum had abundant papillae. A ventral depressed area occurred in D. inflata, between the acetabulum and oral sucker, dividing the collar into two left and right independent parts. The ventral depression in E. revolutum extended from the ventral sucker to the posterior end of the collar, and was not divided. In D. inflata, tegumentary spines were located on the oral sucker, and the collar was posterior to the sucker. In E. revolutum, the oral sucker and the collar lacked tegumentary spines. The region immediately posterior to the collar also lacked spines in E. revolutum. The collar pattern of D. inflata is undoubtedly more primitive than that of E. revolutum.

Sign in / Sign up

Export Citation Format

Share Document