scholarly journals Alterations in the mantle epithelium during transition from hatching gland to adhesive organ of Idiosepius pygmaeus (Mollusca, Cephalopoda)

2015 ◽  
Vol 135 ◽  
pp. 43-57 ◽  
Author(s):  
Norbert Cyran ◽  
Waltraud Klepal ◽  
Yannick Städler ◽  
Jürg Schönenberger ◽  
Janek von Byern
Keyword(s):  
Adhesive Organ ◽  
Hatching Gland

scholarly journals Oviposition and development in the glass frog Hyalinobatrachium orientale (Anura: Centrolenidae)

2015 ◽  
Vol 14 (1) ◽  
pp. 3 ◽  
Author(s):  
Mohsen Nokhbatolfoghahai ◽  
Christopher J. Pollock ◽  
J. Roger Downie
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Small Area ◽  
Tail Length ◽  
Oral Disc ◽  
Progressive Development ◽  
Gland Cells ◽  
Developmental Features ◽  
Hatching Gland ◽  
Scanning Electron

Oviposition and development in the glass frog Hyalinobatrachium orientale (Anura: Centrolenidae). Oviposition and external embryonic developmental features are described in the Tobago glass frog, Hyalinobatrachium orientale. Egg clutches are nearly always laid on the undersides of leaves (one exception); usually leaves of Heliconia sp. are used, but Philodendron and palms may be used in the absence of Heliconia. Clutches contain 28.0 ± 5.3 eggs (mean ± SD) and eggs are 1.86 ± 0.11 mm in diameter. The behavior of one amplectant pair was followed for more than five hours; the pair rotated several times around a small area of the leaf depositing eggs in a tight spiral formation. External embryonic features were observed by scanning electron microscopy. Surface ciliation is extensive up to the time of hatching when it is lost; external gills are short and a cement gland is absent. Hatching gland cells were detectable on the anterodorsal surface of the head from Day 4 after deposition and persisted until at least Day 10, and hatching occurred between Days 9 and 16. During this period, progressive development in tail length, surface pigmentation, intestinal coiling, and oral disc features was observed. Post-hatching larvae reared for six weeks grew 37% in length and tripled in weight, but remained at Gosner Stage 25.

Localization of specific mRNAs in Xenopus embryos by whole-mount in situ hybridization

Development ◽  
1990 ◽  
Vol 110 (2) ◽  
pp. 325-330 ◽  
Author(s):  
A. Hemmati-Brivanlou ◽  
D. Frank ◽  
M.E. Bolce ◽  
B.D. Brown ◽  
H.L. Sive ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Antisense Rna ◽  
Muscle Actin ◽  
Xenopus Embryos ◽  
Whole Mount ◽  
Alpha Globin ◽  
Specific Mrnas ◽  
Protein Rich ◽  
Hatching Gland

We have adapted a non-radioactive technique to detect localized mRNAs in whole-mount Xenopus embryos. Synthetic antisense RNA transcribed in the presence of digoxygenin-UTP is used as a probe and is detected via an anti-digoxygenin antibody. We show that localized mRNAs can be detected from late gastrula to tadpole stages and that high as well as low abundance RNAs can be detected. The method was tested on muscle actin and alpha-globin RNAs, whose localization has previously been characterized. In addition, we used the method to determine the distribution of XA-1 RNA, an anterior ectoderm-specific RNA, which we show is expressed in the periphery of the cement gland as well as in the region of the hatching gland. The sequence of an XA-1 cDNA predicts a protein rich in proline and histidine.

Development of the Xenopus laevis hatching gland and its relationship to surface ectoderm patterning

Development ◽  
1991 ◽  
Vol 111 (2) ◽  
pp. 469-478 ◽  
Author(s):  
T.A. Drysdale ◽  
R.P. Elinson
Keyword(s):  
Retinoic Acid ◽  
Tyrosine Hydroxylase ◽  
Xenopus Laevis ◽  
Ciliated Cells ◽  
Surface Ectoderm ◽  
Gland Cells ◽  
The Face ◽  
Underlying Mechanisms ◽  
Development Proceeds ◽  
Hatching Gland

An antibody that recognizes tyrosine hydroxylase can be used as a marker for hatching gland cells in Xenopus embryos. Using this marker, we have shown that hatching gland cells are induced at the end of gastrulation and that presumptive hatching gland cells are localized to the anterior neural folds in Xenopus. The movements of neurulation bring the hatching gland cells together to form a characteristic Y pattern on the dorsoanterior surface of the head. The Y pattern delineates several zones of surface ectoderm which can be visualized by the presence or absence of ciliated cells. As development proceeds the hatching gland pattern is altered, demonstrating the active changes involved in forming the face. Lithium, UV irradiation and retinoic acid can be used to alter the hatching gland pattern in specific ways which help to understand the underlying mechanisms of ectodermal patterning.

Water skating in the larvae of dixella aestivalis (Diptera) and hydrobius fuscipes (Coleoptera)

1999 ◽  
Vol 202 (7) ◽  
pp. 845-853
Author(s):  
J. Brackenbury
Keyword(s):  
High Speed ◽  
The Body ◽  
Water Interface ◽  
Body Movements ◽  
Chironomid Larvae ◽  
High Speed Video ◽  
Adhesive Organ ◽  
Video Recordings ◽  
Air Water Interface

The kinematics of locomotion was investigated in the aquatic larvae of Dixella aestivalis and Hydrobius fuscipes with the aid of high-speed video recordings. Both insects are able to skate on the surface of the water using the dorso-apical tracheal gill as an adhesive organ or ‘foot’. Progress relies on the variable adhesion of the foot between ‘slide’ and ‘hold’ periods of the locomotory cycle. The flexural body movements underlying skating in D. aestivalis can be derived directly from the figure-of-eight swimming mechanism used in underwater swimming. The latter is shown to be similar to figure-of-eight swimming in chironomid larvae. This study shows how the deployment of a ‘foot’ enables simple side-to-side flexural movements of the body to be converted into effective locomotion at the air-water interface.

Morphogenesis of the hatching gland of Atlantic halibut (Hippoglossus hippoglossus)

1991 ◽  
Vol 200 (4) ◽  
pp. 180-187 ◽  
Author(s):  
Jon Vidar Helvik ◽  
Dag Oscar Oppen-Berntsen ◽  
Per Robert Flood ◽  
Bernt Theodor Walther
Keyword(s):  
Atlantic Halibut ◽  
Hippoglossus Hippoglossus ◽  
Hatching Gland

A Note on the Circulus as an Adhesive Organ in Some Pseudococcidae

1957 ◽  
Vol 89 (1) ◽  
pp. 46-48 ◽  
Author(s):  
D. C. Lloyd ◽  
Eula Martini
Keyword(s):  
Rhodnius Prolixus ◽  
Adhesive Organ ◽  
Unusual Type

Adhesive or climbing organs in the form of empodia or pulvilli between the tarsal claws are common structures in Hymenoptera, Diptera, Hemiptera and other orders (Weber 1933). A more unusual type consisting of a small oval sac on the distal end of the tibia of the prothoracic and metathoracic legs of the reduviid Rhodnius prolixus Stål. has been described by Gillett and Wigglesworth (1932).

scholarly journals Adhesive organ regeneration in Macrostomum lignano

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Birgit Lengerer ◽  
Elise Hennebert ◽  
Patrick Flammang ◽  
Willi Salvenmoser ◽  
Peter Ladurner
Keyword(s):  
Adhesive Organ ◽  
Organ Regeneration ◽  
Macrostomum Lignano
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