scholarly journals New chironomid pupal types from Norway, one with a male pharate adult: Pseudosmittia paraspinispinata n.sp.

2013 ◽  
Author(s):  
Peter H. Langton ◽  
Vít Syrovátka
Keyword(s):  
Pharate Adult

Three new pupal types from Norway are described, one with an associated male: Pseudosmittia parspinispinata n.sp.

CHIRONOMIDAE (DIPTERA) OF CHAR LAKE, CORNWALLIS ISLAND, N.W.T., WITH DESCRIPTIONS OF TWO NEW SPECIES

1976 ◽  
Vol 108 (10) ◽  
pp. 1053-1064 ◽  
Author(s):  
D. R. Oliver
Keyword(s):  
New Species ◽  
Arctic Lakes ◽  
Additional Species ◽  
Two New Species ◽  
Cornwallis Island ◽  
New Distribution ◽  
Pharate Adult ◽  
Chironomid Fauna

AbstractPseudodiamesa arctica (Mall.), Heterotrissocladius subpilosus (Kieff.), Orthocladius (s.s.) lapponicus Goetgh., Orthocladius (s.s.) sp., Paracladius quadrinodosus Hirv., Trissocladius tricornis n. sp., and Lauterbornia sedna n. sp. develop from egg to pharate adult in Char Lake. The occurrence of the larvae of 7 additional species is apparently adventitious, All stages of the two new species plus the larvae of P. arctica and P. quadrinodosus are described. The males of T. tricornis are dimorphic and L. sedna is parthenogenetic. New distribution records are given for most of the species. The chironomid fauna of Char Lake is compared with that of other arctic lakes.

scholarly journals Developmental regulation of ecdysone receptor (EcR) and EcR-controlled gene expression during pharate-adult development of honeybees (Apis mellifera)

2014 ◽  
Vol 5 ◽  
Author(s):  
Tathyana R. P. Mello ◽  
Aline C. Aleixo ◽  
Daniel G. Pinheiro ◽  
Francis M. F. Nunes ◽  
Márcia M. G. Bitondi ◽  
...  
Keyword(s):  
Gene Expression ◽  
Apis Mellifera ◽  
Adult Development ◽  
Developmental Regulation ◽  
Ecdysone Receptor ◽  
Pharate Adult

THE IMMATURE STAGES OF PTYCHOPTERA LENIS LENIS (DIPTERA: PTYCHOPTERIDAE) WITH NOTES ON THEIR BIOLOGY

1973 ◽  
Vol 105 (8) ◽  
pp. 1091-1099 ◽  
Author(s):  
I. D. Hodkinson
Keyword(s):  
Life Cycle ◽  
Water Depth ◽  
Adult Stage ◽  
Atmospheric Oxygen ◽  
Adult Emergence ◽  
Fourth Instar ◽  
Immature Stages ◽  
Experimental Conditions ◽  
Marginal Areas ◽  
Pharate Adult

AbstractThe four larval instars and the pupa of Ptychoptera lenis lenis Osten Sacken are described. Instars 2 to 4 are very similar morphologically but instar 1 is markedly different. Both a pharate pupal and a pharate adult stage were observed. Larvae are found in stagnant marginal areas of ponds where water depth does not exceed 4 cm and where benthic deposits of plant detritus exceed 8 cm. Fourth instar larvae, under experimental conditions, survived up to 45 days without contact with atmospheric oxygen but development was arrested. P. lenis has a 1 year life cycle with an extended adult emergence season from late May to the end of July.

A DrosophilaSNAP-25Null Mutant Reveals Context-Dependent Redundancy WithSNAP-24in Neurotransmission

Genetics ◽  
2002 ◽  
Vol 162 (1) ◽  
pp. 259-271 ◽  
Author(s):  
Ilya Vilinsky ◽  
Bryan A Stewart ◽  
James Drummond ◽  
Iain Robinson ◽  
David L Deitcher
Keyword(s):  
Synaptic Transmission ◽  
Larval Stage ◽  
Neurotransmitter Release ◽  
Synaptic Proteins ◽  
Null Alleles ◽  
Temperature Sensitive ◽  
Mutant Form ◽  
F1 Progeny ◽  
Sensitive Allele ◽  
Pharate Adult

AbstractThe synaptic protein SNAP-25 is an important component of the neurotransmitter release machinery, although its precise function is still unknown. Genetic analysis of other synaptic proteins has yielded valuable information on their role in synaptic transmission. In this study, we performed a mutagenesis screen to identify new SNAP-25 alleles that fail to complement our previously isolated recessive temperature-sensitive allele of SNAP-25, SNAP-25ts. In a screen of 100,000 flies, 26 F1 progeny failed to complement SNAP-25ts and 21 of these were found to be null alleles of SNAP-25. These null alleles die at the pharate adult stage and electroretinogram recordings of these animals reveal that synaptic transmission is blocked. At the third instar larval stage, SNAP-25 nulls exhibit nearly normal neurotransmitter release at the neuromuscular junction. This is surprising since SNAP-25ts larvae exhibit a much stronger synaptic phenotype. Our evidence indicates that a related protein, SNAP-24, can substitute for SNAP-25 at the larval stage in SNAP-25 nulls. However, if a wild-type or mutant form of SNAP-25 is present, then SNAP-24 does not appear to take part in neurotransmitter release at the larval NMJ. These results suggest that the apparent redundancy between SNAP-25 and SNAP-24 is due to inappropriate genetic substitution.

DEVELOPMENT AND BIONOMICS OF CHRYSOMELOBIA LABIDOMERAE (ACARI: TARSONEMINA; PODAPOLIPIDAE), A PARASITE OF THE MILKWEED LEAF BEETLE (COLEOPTERA: CHRYSOMELIDAE)

1975 ◽  
Vol 107 (6) ◽  
pp. 627-638 ◽  
Author(s):  
Thomas C. Baker ◽  
George C. Eickwort
Keyword(s):  
Leaf Beetle ◽  
High Population ◽  
Immature Stages ◽  
Adult Males ◽  
Nymphal Instar ◽  
Male And Female ◽  
Adult Females ◽  
Original Length ◽  
Chrysomelobia Labidomerae ◽  
Pharate Adult

AbstractAdult females of Chrysomelobia labidomerae Eickwort lay eggs on the upper surfaces of the hind wings of Labidomera clivicollis (Kirby). The eggs hatch in approximately 7 days and male and female larvae feed at the base of the wings and in the meso–metathoracic crevice and swell to about twice their original length. For about the second half of the approximately 7-day larval stadium, the larvae are inactive (pharate adults) and are usually cemented to the undersurfaces of the elytra. Inactive female larvae are accompanied by adult males that apparently copulate with the newly emerged adult females. The pharate adult is enclosed in a cuticular sac that may represent a calyptostatic nymphal instar. Adult females feed on the beetle’s abdominal terga and sometimes also occur on its venter where they do not feed. Females disperse from host to host when the beetles copulate. The species is arrhenotokous. Mites overwinter on the diapausing adult beetles and do not infest the immature stages of their host. Even at high population levels, the mites do not noticeably affect the longevity or fecundity of their hosts.

Photographic polytene chromosome maps for Glossina morsitans submorsitans (Diptera: Glossinidae): cytogenetic analysis of a colony with sex-ratio distortion

Genome ◽  
2002 ◽  
Vol 45 (5) ◽  
pp. 871-880 ◽  
Author(s):  
A Gariou-Papalexiou ◽  
G Yannopoulos ◽  
A Zacharopoulou ◽  
R H Gooding
Keyword(s):  
Sex Ratio ◽  
Polytene Chromosome ◽  
X Chromosome ◽  
Polytene Chromosomes ◽  
Glossina Morsitans ◽  
Glossina Morsitans Submorsitans ◽  
Ratio Distortion ◽  
Chromosome Maps ◽  
Sex Ratio Distortion ◽  
Pharate Adult

Photographic polytene chromosome maps from trichogen cells of pharate adult Glossina morsitans submorsitans were constructed. Using the standard system employed to map polytene chromosomes of Drosophila, the characteristic landmarks were described for the X chromosome and the two autosomes (L1 and L2). Sex-ratio distortion, which is expressed in male G. m. submorsitans, was found to be associated with an X chromosome (XB) that contains three inversions in each arm. Preliminary data indicate no differences in the fecundity of XAXA and XAXB females, but there are indications that G. m. submorsitans in colonies originating from Burkina Faso and Nigeria have genes on the autosomes and (or) the Y chromosome that suppress expression of sex-ratio distortion.Key words: tsetse, Glossina morsitans submorsitans, polytene chromosome maps, inversions, sex-ratio distortion.

The spiracular gill of the fly Eutanyderus (Tanyderidae)

1966 ◽  
Vol 14 (3) ◽  
pp. 365 ◽  
Author(s):  
HE Hinton
Keyword(s):  
Adult Stage ◽  
Living Animal ◽  
Pharate Adult

The structure of the spiracular gills of Eutanyderus (Tanyderidae) is described. The surface of the gill bears a plastron that opens into the spiracular atrium at the base of the gill. Blood and epidermis are present in the gill lumen in the pharate adult stage. These tissues are completely isolated from the living animal at the pupal-adult moult. Although the cuticle of the spiracular gills is relatively thick, it is not rigid and the spiracular gills are flattened even when exposed to relative humidities as high as 70 %, and it is suggested that turgidity in the living gill is achieved by the absorption of water by the isolated tissue.

Sign in / Sign up

Export Citation Format

Share Document