PARTIAL PREPARATORY STAGES OF CATOCALA ILLECTA, WALKER, WITH NOTES

1892 ◽  
Vol 24 (12) ◽  
pp. 307-308
Author(s):  
G. H. French
Keyword(s):  
Anterior Part ◽  
Posterior Part ◽  
The Body ◽  
The Other ◽  
Ground Colour ◽  
Anterior Half ◽  
Black Spots ◽  
Last Stage

Three days before that last moult, the larva is 1.30 inches; after the last moult and three days before pupating, 2 inches. Nearly cylindrical, tapering from the middle to both ends, the under side a little flattened, a slight fold above the legs but no fringe on the sides. The markings in the two last stages are the same, except that the orange is a little heavier in the last stage. The ground colour of dorsum, sides except below stigmata, and venter sordid white, below stigmata clear white; striped transversely over the back as low as the stigmata, thus leaving a clear white substigmatal stripe, eight of these stripes and these somewhat double, some broken and others partly continuous; a subdorsal and substigmatal row of orange patches, two of each row on each joint, the lower of each side of the stigma on the anterior part of the body, but on the posterior part these patches connect above the stigma, gradually passing from one from to the other; on joint two, instead of two pathces, the anterior half of the joint is orange with a row of black spots; joints three and four with an irregular row of orange across near the middle of the joint.

Etude histologique de la régénération pharyngienne de Syllis gracilis Grube (Annélide, Polychète)

1974 ◽  
Vol 52 (1) ◽  
pp. 169-177 ◽  
Author(s):  
B. Boilly ◽  
N. Thibaut
Keyword(s):  
Anterior Part ◽  
Posterior Part ◽  
Muscle Cells ◽  
The Other ◽  
Direct Transformation ◽  
Other Hand ◽  
To Come ◽  
Anterior Regeneration ◽  
Radial Muscle

During anterior regeneration of Syllis gracilis Grube (Annelida, Polychaeta), the pharynx (pharyngeal sheath, proboscis, proventricle, and ventricle) completely regenerates. Most of the regenerated pharynx (pharyngeal sheath, proboscis, and proventricle) proceeds from direct transformation of the stomodeal invagination. On the other hand, the ventricle seems to come from both the posterior end of the regenerated proventricle (anterior part of the ventricle) and the intestine of the stump (posterior part of the ventricle corresponding to the ventricular coeca).Tile differentiation of the pharynx is precocious and mainly appears in a particular disposition, and a typical evolution of the cells of the mesodermal sheath surrounding the stomodeal invagination. Starting from the 11th day after amputation, the proventricle differs from the presumptive proboscis by a thick mesodermal sheath which forms the radial muscle cells, the transverse diaphragms, and the peritoneal epithelium. On the other hand, the differentiation of the ventricle comes later (17th day after the section was done).

scholarly journals The anatomy of symmetrical double monstrosities in the trout

1901 ◽  
Vol 68 (442-450) ◽  
pp. 129-134 ◽  
Keyword(s):  
Anterior Part ◽  
Posterior Part ◽  
Yolk Sac ◽  
The Body ◽  
Special Adaptation ◽  
Structural Details ◽  
Complete Series

This paper contains the results of an investigation into the anatomy of a series of trout embryos exhibiting different degrees of symmetrical duplicity, and gives an account of the structural details which attend the fusion, disappearance, or special adaptation of parts in the region of transition from the double to the single condition. Some general questions suggested by these results are also discussed. The monstrosities examined were four months old counting from the time of fertilisation, and they form a fairly complete series ranging from specimens in which the duplicity does not affect more than the anterior part of the head to specimens in which there is union by the posterior part of the body or by the yolk-sac only.

Acrostichus puri n. sp. (Nematoda: Diplogastridae), a phoretic associate of Augochlora pura mosieri Cockerell (Hymenoptera: Halictidae)

Nematology ◽  
2010 ◽  
Vol 12 (1) ◽  
pp. 49-64 ◽  
Author(s):  
Yongsan Zeng ◽  
W. Kelley Thomas ◽  
Natsumi Kanzaki ◽  
Barbara Center ◽  
Robin Giblin-Davis ◽  
...  
Keyword(s):  
New Species ◽  
Anterior Part ◽  
Posterior Part ◽  
The Body ◽  
Sweat Bee ◽  
Molecular Sequence ◽  
Female Tail ◽  
Triangular Flap ◽  
Mating Tests

AbstractAcrostichus puri n. sp., isolated from the body of a sweat bee, Augochlora pura mosieri, is described and figured. The new species is morphologically, molecularly and biologically very similar to A. halicti, i.e., these two species share a very complicated gubernaculum structure, distally hooked spicules with a triangular flap-like rostrum, stomatal polymorphism and synchronised associations with halcitid bees. The new species can be distinguished from A. halicti by its spicule morphology, distinctive squared manubrium and sharply bent (= ca 90° or L-shaped) distal tip vs an indistinctive rounded manubrium and a strongly recurved (= ca 180° or U-shaped) distal tip; gubernaculum with narrower, longer, anterior part and more complex posterior part than A. halicti, and tail of both sexes, with a long and filiform spike on the male or female tail vs a short spike (male) or conical tail (female). These two species also differ from each other by significant molecular sequence differences in SSU (2.0%), D2/D3 LSU (4.5%) and mtCOI (9.2%), and are reproductively incompatible in mating tests.

scholarly journals Histological and Morphometrical Study of the Filiform Papillae in the Domestic Rabbit (Oryctolagus cuniculus)

2021 ◽  
Vol 78 (1) ◽  
pp. 63
Author(s):  
Mircea CIPOU ◽  
Cristian MARTONOS ◽  
Adrian Florin GAL ◽  
Vasile RUS ◽  
Ion VLASIUC ◽  
...  
Keyword(s):  
Anterior Part ◽  
Posterior Part ◽  
Dorsal Surface ◽  
Maximum Level ◽  
Body Part ◽  
The Body ◽  
Domestic Rabbit ◽  
Mixed Breed ◽  
Filiform Papillae ◽  
Morphometrical Study

The domestic rabbit is often preferred as an experimental model in diverse research and especially those regarding pathologies of the oral cavity, both in human and veterinary medicine. From five domestic mixed breed rabbits, fragments were harvested from the three regions of the tongue: apex, body and root, for histological investigations. The samples were processed by embedding in paraffin, sectioned at a thickness of 5 µm and stained with Goldner’s trichrome method. The histological examination highlighted the presence of the filiform papillae on the entire dorsal surface of the tongue, with morphological particular carachteristics for each portion. The dimension of the filiform papillae of the rabbit’s tongue differs both regarding the length as well as the thickness and density. The shortest filiform papillae were found on the tip of the tongue, then the length increases progressively, reaching the maximum level on the middle portion and decreases in the last portion. The density also differs, in in the three compartments examined, being the highest in the anterior part and the lowest in the posterior part. The thickness of the filiform papillae is inversely proportional to their density. The thickness of the papillae is smaller where the density is higher and highest where the density is lowest. The upper surface of the filiform papillae is variably keratinized depending on the lingual segment. The papillae with the highest level of keratinization are arranged in the body part of the tongue, and those at the tip and root are slightly lower.

scholarly journals The Function of the Anal Gills of the Mosquito Larva

1933 ◽  
Vol 10 (1) ◽  
pp. 16-26 ◽  
Author(s):  
V. B. WIGGLESWORTH
Keyword(s):  
Carbon Dioxide ◽  
Body Surface ◽  
Mosquito Larva ◽  
Anterior Part ◽  
Pure Water ◽  
Posterior Part ◽  
The Body ◽  
Glycerol Water ◽  
Hypertonic Solutions ◽  
Spontaneous Aggregation

The anal gills of the mosquito larva (Aedes argenteus) are the only region of the body that is freely permeable to water. In hypertonic solutions of sugar or glycerol, water is extracted from the gills and the larva shrinks. In pure water this is absorbed by the gills and later excreted by the Malpighian tubes. The absorption of water appears to be effected mainly by osmosis. Larvae can mature without the gills, but they seem to grow more slowly, and show almost no parenteral absorption of water. Normally the larva swallows very little fluid. The fluid in the gut is probably secreted in the posterior part of the mid-gut and reabsorbed in the anterior part and in the caeca. Some of the water excreted by the Malpighian tubes is reabsorbed in the rectum. As judged by the spontaneous aggregation of the flagellate Polytoma, oxygen is absorbed by submerged larvae all over the body surface, but most actively at the base of the gills. Carbon dioxide is given off equally all over the body surface. It is concluded that the anal gills are primarily water-absorbing organs, and are only incidentally concerned in respiration.

scholarly journals Memoirs: Nephridia and Body-cavity of some Decapod Crustacea

1893 ◽  
Vol s2-34 (136) ◽  
pp. 403-426
Author(s):  
EDGAR J. ALLEN
Keyword(s):  
Nerve Cord ◽  
Anterior Part ◽  
Posterior Part ◽  
Body Cavity ◽  
The Body ◽  
Shell Gland ◽  
Central Cavity ◽  
Typical Structure ◽  
Pericardial Cavity ◽  
Dorsal Sac

1. The green gland of Palæmonetes (and Palæmon) at the time of hatching of the larva has not developed a lumen, although the external opening can be detected. When the larva leaves the egg the lumen commences to open, and the gland consists of an end-sac and a U-shaped tube, of which the distal portion gives rise to the bladder. The bladder then enlarges greatly, growing at first inwards towards the middle ventral line, then upwards, within the oesophageal nerve-ring and anterior to the oesophagus, to the middle dorsal line, where it meets its fellow of the opposite side. The two bladders grow backwards over the stomach and beneath the dorsal sac, subsequently fusing together in the middle line to form the unpaired nephro-peritoneal sac. 2. The shell-glands are the functional excretory organs at the time of hatching and during the latter part of the embryonal period. They open at the bases of the second maxillæ, and each consists of an end-sac and a Y-shaped renal tube, which have the typical structure of a crustacean nephridium. 3. A dorsal sac, which is completely enclosed by an epithelial lining, persists in adults of Palsem on, Palæmonetes, and Crangon. This sac, which does not contain blood, lies upon the nephro-peritoneal sac and the front end of the ovary, being much enlarged at its posterior end. The cephalic aorta (ophthalmic artery) lies within the dorsal sac. 4. At its anterior end the dorsal sac is surrounded by a mass of tissue which appears to be producing blood-corpuscles. 5. The dorsal sac is formed as a hollowing out in masses of mesoderm-cells, which lie on either side of the cephalic aorta. Two lateral cavities are thus formed, which increase in size and unite below the aorta. Taking into account this mode of development, a comparison with Peripatus shows that the dorsal sac is homologous with the dorsal portions of the mesoblastic somites of that animal, and must therefore be regarded as a true cœlom. 6. The body-cavity of these Crustaceans varies in different regions. (a) In the anterior part of the thorax it consists of a true cœlom (the dorsal sac and nephridia) and a hæmocœle. The hæmocœle consists of (1) a central cavity, in which the stomach and intestine, the liver and the nerve-cord lie; (2) two lateral cavities, which contain the end-sac and proximal end of the tube of the shell-gland, and which communicate with the central cavity and with the cavities of the legs; and (3) these leg-cavities, which, in the second maxillæ, contain the tube of the shell-gland. (b) In the posterior part of the thorax the body-cavity is entirely a hæmocœle. It consists of (1) the pericardial cavity, in which lies (2) the heart, and which is separated by the pericardial septum from (3) the central cavity of the body, which contains the genital organs, liver, intestine, and nerve-cord; (4) the lateral cavities, which communicate with the central cavity and with (5) the cavities of the legs. (c) In the abdomen the body-cavity is entirely a hæmocœle. It consists of a dorsal and a ventral sinus, which communicate with one another by lateral sinuses.

A new species of patch-nosed snake (Colubridae: Salvadora Baird and Girard, 1853) from Oaxaca, Mexico

Zootaxa ◽  
2019 ◽  
Vol 4564 (2) ◽  
pp. 588
Author(s):  
CARLOS ALBERTO HERNÁNDEZ-JIMÉNEZ ◽  
OSCAR FLORES-VILLELA ◽  
JONATHAN ATWOOD CAMPBELL
Keyword(s):  
New Species ◽  
Anterior Part ◽  
Posterior Part ◽  
The Body ◽  
Taxonomic Descriptions ◽  
A New Species

A new species of snake of the genus Salvadora from Oaxaca, Mexico, is described. This taxon was confused with S. intermedia in previous taxonomic descriptions. It is characterized by lacking a pale vertebral stripe and by having incomplete dorsolateral stripes that do not reach the posterior part of the body, which is typical of congeners; by having both dorsolateral stripes separated each other by five to six scale rows on anterior part of body; and other scalation characters as well as the number maxillary teeth. The importance of this snake and its conservation is discussed. 

Fossorial behavior and ecology of the chorus frog Pseudacris ornate

1984 ◽  
Vol 5 (3-4) ◽  
pp. 261-273 ◽  
Author(s):  
Lauren E. Brown ◽  
D. Bruce Means
Keyword(s):  
Breeding Season ◽  
Sandy Soils ◽  
Great Majority ◽  
The Body ◽  
The Other ◽  
Anterior Half ◽  
Morphological Adaptations ◽  
Sensory Structures ◽  
Chorus Frog ◽  
Fossorial Species

The chorus frog Pseudacris ornata is a fossorial species that uses its forelimbs to burrow in the substrate. This is highly unusual as the great majority of burrowing frogs dig backwards with their hind feet. Pseudacris ornata is quite similar in manner of forelimb burrowing to its nearest relative Pseudacris streckeri. However, P. ornata shows greater hesitancy to burrow and thus is intermediate between the highly fossorial P. streckeri and another species, Pseudacris triseriata, which is not known to burrow . In morphological adaptations of the forelimb for burrowing, P. ornata is also intermediate between the other two species. Pseudacris ornata spends much of its time underground outside its breeding season, and is associated with easily penetrated sandy soils. Pseudacris ornata occasionally communicates underground by vocalization. This type of communication may be of an aversive nature. Forward burrowing may have evolved in salientians to facilitate subterranean feeding or other behaviors requiring efficient orientation using sensory structures on the anterior half of the body.

4. Description of Pygopterus Greenockii (Agassiz); with Notes on the Structural Relations of the genera Pygopterus, Amblypterus and Eurynotus

1866 ◽  
Vol 5 ◽  
pp. 597-600 ◽  
Author(s):  
Ramsay H. Traquair
Keyword(s):  
Anterior Part ◽  
The Body ◽  
The Other ◽  
Vertebral Bodies ◽  
Structural Relations ◽  
Different Parts

In this paper a detailed description is given of a species of Pygopterus (P. Greenockii) from the carboniferous shales of Wardie, Mid-Lothian, which was named by Agassiz, but without any figure or description, beyond the mention of the fact that the scales of the anterior part of the trunk are higher than broad, a circumstance distinguishing it from all the other species of this genus.According to specimens exhibited by the author, the scales are of different forms on different parts of the body, being very minute, and nearly equilateral along the belly; the fins are large, and the dorsal is placed so far back as to be nearly opposite the anal; the interspinous bones of the azygos fins are well developed, and there are traces of vertebral apophyses, but none of vertebral bodies.

Austrobatrachus iselesele, a new toadfish species from South Africa (Teleostei: Batrachoididae)

Zootaxa ◽  
2012 ◽  
Vol 3400 (1) ◽  
pp. 58 ◽  
Author(s):  
DAVID W. GREENFIELD
Keyword(s):  
South Africa ◽  
The Body ◽  
The Other ◽  
Black Spots ◽  
Kwazulu Natal

The second known species in the genus Austrobatrachus is described from KwaZulu-Natal, South Africa. Its live color-ation is very different from the other known species, A. foedus, having many black spots on the body and solid colored fins. It also has a longer snout and larger eye. The species lives in holes in the reef at depths of 49–50 m.

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