On Microstrongylus genetiæ gen. and sp. nov., a Trichostrongyle Parasite of Genetta senegalensis

1927 ◽  
Vol 5 (2) ◽  
pp. 81-88 ◽  
Author(s):  
Thomas W. M. Cameron
Keyword(s):  
Small Intestine ◽  
Excretory Pore ◽  
Posterior Margin ◽  
Anterior Margin ◽  
Body Wall ◽  
Ventral Side ◽  
The Body ◽  
Zoological Society ◽  
Granular Inclusion ◽  
Cephalic Extremity

A Considerable number of specimens of this parasite were collected from the small intestine of a genette which died in the Gardens of the Zoological Society of London.The cuticle of the cephalic extremity is dilated anteriorly. This swelling is terminated posteriorly by the cuticle incurving to meet a raised ring on the body-wall, about the level of the junction of the anterior and second fifths of the œsophagus. There are no cervical papillæ present, and it is probable that this ring may be regarded as replacing them. Just anterior to the middle of the œsophageal region and at the level of the excretory pore is a cervical groove which completely encircles the body. Laterally the cuticle on the anterior margin is thickened; it is also thickened on the ventral side, but less so than laterally. These thickenings are reinforced by a granular inclusion in the cuticle. The posterior margin is thickened only in the region of the excretory pore.

Three new species of earthworms belonging to the genus Amynthas (Oligochaeta: Megascolecidae) from Hainan Island, China

Zootaxa ◽  
2010 ◽  
Vol 2680 (1) ◽  
pp. 26 ◽  
Author(s):  
JING SUN ◽  
QI ZHAO ◽  
JIANG-PING QIU
Keyword(s):  
New Species ◽  
Body Wall ◽  
Hainan Island ◽  
Ventral Side ◽  
The Body ◽  
Pore Region ◽  
Ventral Midline ◽  
Three New Species ◽  
Prostatic Ducts

This paper describes three new species of earthworms from Hainan Island, China: Amynthas trapezoides sp. nov., Amynthas conchipapillatus sp. nov. and Amynthas dongfangensis sp. nov. Amynthas trapezoides has no pigment, and has two pairs of spermathecal pores in 6/7 and 7/8 arranged trapezoidally near the mid-ventral line, a complicated glandular region on ventral side of 1/2XVII–1/4XIX, developed prostates and repeatedly curved prostatic ducts close to ventral midline. Amynthas conchipapillatus sp. nov. has no pigment, and has a pair of large convex smooth shellfish-like papillae in male pore region, only one pair of spermathecal pores in 5/6 and undeveloped thin prostates which closely adherent to the body wall. Amynthas dongfangensis sp. nov. has a pair of male pores on the centre of a flat-topped conical protuberance surrounded by three to five circular folds, and five pairs of spermathecal pores in 4/5–8/9.

The ultrastructure of the cuticle of the nematode Syphacia obvelata (Rudolphi, 1802). IV. The cuticle associated with the female excretory pore, vulva, and vagina vera

1974 ◽  
Vol 52 (2) ◽  
pp. 245-250 ◽  
Author(s):  
T. A. Dick ◽  
K. A. Wright
Keyword(s):  
Internal Pressure ◽  
Excretory Pore ◽  
Body Wall ◽  
The Body ◽  
Muscular System ◽  
Cortical Zone ◽  
Syphacia Obvelata ◽  
Initial Force

The cuticle forming the excretory pore complex and the vulva and vagina vera in female Syphacia obvelata is formed by body wall cuticle. The nature of the cuticle surrounding the excretory pore and forming the bladder, and tile absence of a muscular system to control the complex suggest that internal pressure (probably hydrostatic) is the generating force for fluid expulsion. The lumens of the vulva and vagina vera are lined by and continuous with the cortical zone of the body wall cuticle. The lumens of both the vulva and vagina vera are tetraradiate. The arrangement of the cuticle at the proximal end of the vagina vera allows for a mechanical means of ejecting eggs (the functional ovijector). The initial force to move eggs up to the ovijector is from the muscles surrounding the vagina vera.

Moulting and mating in Lepeophtheirus pectoralis (Copepoda: Caligidae)

1990 ◽  
Vol 70 (2) ◽  
pp. 269-281 ◽  
Author(s):  
Morten Anstensrud
Keyword(s):  
Adult Female ◽  
Anterior Margin ◽  
Ventral Side ◽  
Dorsal Side ◽  
The Body ◽  
Agonistic Behaviour ◽  
Free Living ◽  
Genital Complex ◽  
Frontal Filament ◽  
Receptaculum Seminis

Prior to moulting, the preadult Lepeophtheirus pectoralis produces a temporary frontal filament which attaches the animal to the surface of the host during ecdysis. This filament is extruded from a frontal organ previously thought to have a chemoreceptory function. During ecdysis the exuvium splits at the anterior margin and is shed posteriorly by contractions of the body. After hardening of the exoskeleton the copepod detaches itself from the frontal filament and is free-living on the host during intermoult. Males in precopula position hold on to the dorsal side of the female, with the second antennae grasping the anterior end of the female's genital complex. During the ecdysis of the female, most males release their hold on the female, and are usually found close to her on the host. Copulation occurs between an adult male and an adult female with a hardened exoskeleton. In the copula position the male holds on to the female's genital complex with the second antennae, but now on the ventral side of the female. Two spermatophores are extruded and then transferred simultaneously to the female with the aid of the second pair of swimming legs. Tubes originating from the spermatophores connect them to the orifices of the receptaculum seminis. These tubes seem to grow out of the spermatophores after expulsion. After copulation, the male retains a precopula position before releasing the female. No agonistic behaviour has been observed between a precopulating/copulating male and additional males. However, during the ecdysis of the female, a new male may take over the female, but mating does not seem to be assortative for size in Lepeophtheirus pectoralis.

scholarly journals Two new species of feather mites (Acarina: Psoroptidia) from the Oriental Magpie-Robin, Copsychus saularis (Passeriformes: Muscicapidae)

Acarologia ◽  
2018 ◽  
Vol 58 (2) ◽  
pp. 313-331
Author(s):  
Ioana Cristina Constantinescu ◽  
Gabriel Bogdan Chişamera ◽  
Angela Petrescu ◽  
Adam Costică
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Anterior Margin ◽  
Mite Species ◽  
The Body ◽  
Hysteronotal Shield ◽  
Feather Mites ◽  
Terminal Cleft ◽  
Posterior Quarter ◽  
Lobe Width

Two new feather mite species from the bird host Copsychus saularis (Linnaeus) collected in Indonesia (Kalimantan) are described: Dolichodectes latilobus n. sp. (Proctophyllodidae, Pterodectinae), and Trouessartia saularis n. sp. (Trouessartiidae). The new species, Dolichodectes latilobus, has the following distinctive characters: in males, the opisthosomal lobes are widened in the posterior half; the opisthoventral shields are fused, forming a single shield that covers ventrally the posterior quarter of the body; legs I have longitudinal crest-like processes ; and setae ra on these legs are spiculiform. In females of D. latilobus, the posterior margin of the hysteronotal shield has a deep median invagination, and epimerites II extend to the level of the anterior margin of epigynum. The males of T. saularis have the adanal apodemes with two narrow lateral membranes, and the females have the terminal cleft width smaller than the opisthosomal lobe width, and the collar of the spermatheca cover 1/2 from the length of secondary spermaduct.

scholarly journals NEW NORTH AMERICAN DIPTERA

1902 ◽  
Vol 34 (9) ◽  
pp. 240-242 ◽  
Author(s):  
Chas. W. Johnson
Keyword(s):  
North American ◽  
Posterior Margin ◽  
Anterior Margin ◽  
The Body ◽  
Light Yellow

Macrocera immaculata, n. sp. – ♂ ♀. Head yellow, vertex brownish; antennæ dark brown, the two basal joints yellow. Thorax dark yellow, with the anterior margin and humeri light yellow. Abdomen dark brown, shining, with a wide yellowish posterior margin on each segment. Legs yellow, slightly brownsish at the tips of the femora, tibiæ and tarsi; legs and abdomen in the male with fine black hairs, which are less conspicous in the female. Wings yellowish hyaline, with a slight brownish stigma and very fine hairs. Length of body 5 mm., the antennæ and posterior legs each about double the length of the body.

Lymphangiomatosis of the Body Wall: A Report of Two Cases Associated with Chylothorax and Fatal Outcome

1997 ◽  
Vol 17 (4) ◽  
pp. 617-624 ◽  
Author(s):  
Philippe Moerman ◽  
Chris Van Geet ◽  
Hugo Devlieger
Keyword(s):  
Body Wall ◽  
Fatal Outcome ◽  
The Body

scholarly journals A screen for genetic loci required for body-wall muscle development during embryogenesis in Caenorhabditis elegans.

Genetics ◽  
1994 ◽  
Vol 137 (2) ◽  
pp. 483-498
Author(s):  
J Ahnn ◽  
A Fire
Keyword(s):  
Caenorhabditis Elegans ◽  
Myosin Heavy Chain ◽  
Muscle Cell ◽  
Heavy Chain ◽  
Body Wall ◽  
Muscle Development ◽  
Contractile Function ◽  
The Body ◽  
Body Wall Muscle ◽  
Genetic Loci

Abstract We have used available chromosomal deficiencies to screen for genetic loci whose zygotic expression is required for formation of body-wall muscle cells during embryogenesis in Caenorhabditis elegans. To test for muscle cell differentiation we have assayed for both contractile function and the expression of muscle-specific structural proteins. Monoclonal antibodies directed against two myosin heavy chain isoforms, the products of the unc-54 and myo-3 genes, were used to detect body-wall muscle differentiation. We have screened 77 deficiencies, covering approximately 72% of the genome. Deficiency homozygotes in most cases stain with antibodies to the body-wall muscle myosins and in many cases muscle contractile function is observed. We have identified two regions showing distinct defects in myosin heavy chain gene expression. Embryos homozygous for deficiencies removing the left tip of chromosome V fail to accumulate the myo-3 and unc-54 products, but express antigens characteristic of hypodermal, pharyngeal and neural development. Embryos lacking a large region on chromosome III accumulate the unc-54 product but not the myo-3 product. We conclude that there exist only a small number of loci whose zygotic expression is uniquely required for adoption of a muscle cell fate.

scholarly journals Cloning and sequencing of cDNA of Sarcophaga peregrina humoral lectin induced on injury of the body wall.

1985 ◽  
Vol 260 (22) ◽  
pp. 12228-12233 ◽  
Author(s):  
H Takahashi ◽  
H Komano ◽  
N Kawaguchi ◽  
N Kitamura ◽  
S Nakanishi ◽  
...  
Keyword(s):  
Body Wall ◽  
The Body ◽  
Cloning And Sequencing

scholarly journals Mutations Affecting Nerve Attachment of Caenorhabditis elegans

Genetics ◽  
2001 ◽  
Vol 157 (4) ◽  
pp. 1611-1622 ◽  
Author(s):  
Go Shioi ◽  
Michinari Shoji ◽  
Masashi Nakamura ◽  
Takeshi Ishihara ◽  
Isao Katsura ◽  
...  
Keyword(s):  
Caenorhabditis Elegans ◽  
Nerve Cord ◽  
Ventral Nerve Cord ◽  
Body Wall ◽  
The Body ◽  
Genetic Loci ◽  
Muscle Attachment ◽  
C Elegans ◽  
Ventral Cord ◽  
Excretory Canal

Abstract Using a pan-neuronal GFP marker, a morphological screen was performed to detect Caenorhabditis elegans larval lethal mutants with severely disorganized major nerve cords. We recovered and characterized 21 mutants that displayed displacement or detachment of the ventral nerve cord from the body wall (Ven: ventral cord abnormal). Six mutations defined three novel genetic loci: ven-1, ven-2, and ven-3. Fifteen mutations proved to be alleles of previously identified muscle attachment/positioning genes, mup-4, mua-1, mua-5, and mua-6. All the mutants also displayed muscle attachment/positioning defects characteristic of mua/mup mutants. The pan-neuronal GFP marker also revealed that mutants of other mua/mup loci, such as mup-1, mup-2, and mua-2, exhibited the Ven defect. The hypodermis, the excretory canal, and the gonad were morphologically abnormal in some of the mutants. The pleiotropic nature of the defects indicates that ven and mua/mup genes are required generally for the maintenance of attachment of tissues to the body wall in C. elegans.

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