Biology and morphology of immature stages of Meteorus trachynotus Vier. (Hymenoptera: Braconidae)

1990 ◽  
Vol 68 (5) ◽  
pp. 1000-1004 ◽  
Author(s):  
J. C. Thireau ◽  
J. Régnière ◽  
C. Cloutier
Keyword(s):  
Average Duration ◽  
Choristoneura Fumiferana ◽  
Pupal Stage ◽  
Instar Larva ◽  
Immature Stages ◽  
Head Region ◽  
Larval Stages ◽  
First Instar ◽  
Immature Development ◽  
First Time

The immature stages of Meteorus trachynotus Vier., developing in larvae of Choristoneura fumiferana (Clem.), are described. The egg of M. trachynotus is of the stalked type. There are three larval stages. The first instar has a caudal appendage which stops growing in the second instar and is lost when the larva exits from the host in the third instar. Only the first and third instars have sclerotized structures. The head region of the first instar bears a pair of hooklike appendages which are described for the first time. Cephalic sclerites of the last instar larva of other species of Meteorus are compared with those of M. trachynotus. The average duration of immature development at 23 °C was 18 days, the egg stage lasted 3 days, the first, second, and third instars lasted 5, 2.5, and 2.5 days, respectively, and the pupal stage lasted 5 days.

scholarly journals Biology and External Morphology of the Immature Stages of Dirphia moderata Bouvier (Lepidoptera: Saturniidae: Hemileucinae) in Anacardium occidentale L.

2020 ◽  
Vol 80 (1) ◽  
pp. 147-157
Author(s):  
G. A. S. Gonçalves ◽  
F. S. Barbosa ◽  
M. Paluch
Keyword(s):  
Average Duration ◽  
General Pattern ◽  
Instar Larva ◽  
Anacardium Occidentale ◽  
External Morphology ◽  
Cultivated Plants ◽  
Immature Stages ◽  
Average Temperature ◽  
First Instar ◽  
Cashew Tree

Abstract The genus Dirphia Hübner, [1819] presents Neotropical distribution. This genus, besides causing accidents of interest in public health, is a potential defoliator pest of cultivated plants, among them the cashew tree (Anacardium occidentale L.), a crop of great economic importance. This study describes the biology, external morphology of the immature stages of Dirphia moderata Bouvier, 1929 including the first instar larva chaetotaxy. The egg stage had an average duration of 15 days, larval stage 45 days and pupa 60 days, totaling 120 days in average temperature of 28.8 °C and 59.5% relative humidity. Six instars were confirmed by the Dyar rule, with a growth rate of cephalic capsule K = 1.4 times per ínstar. The results found in the first ínstar chaetotaxy follow the general pattern known for Hemileucinae.

scholarly journals Immature Stages and Life Cycle of the Wasp Moth,Cosmosoma auge(Lepidoptera: Erebidae: Arctiinae) under Laboratory Conditions

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Gunnary León-Finalé ◽  
Alejandro Barro
Keyword(s):  
Life Cycle ◽  
Host Plant ◽  
Pupal Stage ◽  
Immature Stages ◽  
New Host ◽  
Mikania Micrantha ◽  
Larval Stages ◽  
Arctiid Moth ◽  
First Time ◽  
Cuban Population

Cosmosoma auge(Linnaeus 1767) (Lepidoptera: Erebidae) is a Neotropical arctiid moth common in Cuban mountainous areas; however, its life cycle remains unknown. In this work,C. augelife cycle is described for the first time; also, immature stages are described using a Cuban population. Larvae were obtained from gravid wild females caught in Viñales National Park and were fed with fresh leaves of its host plant, the climbing hempweedMikania micranthaKunth (Asterales: Asteraceae), which is a new host plant record. Eggs are hemispherical and hatching occurred five days after laying. Larval period had six instars and lasted between 20 and 22 days. First and last larval stages are easily distinguishable from others. First stage has body covered by chalazae and last stage has body covered by verrucae as other stages but has a tuft on each side of A1 and A7. Eggs and larvae features agree with Arctiinae pattern. Pupal stage lasted eight days, and, in general, females emerge before males as a result of pupal stage duration differences between sexes.

Observations on the biology of Caraphractus cinctus Walker (Hymenoptera: Mymaridae), a parasitoid of the eggs of Dytiscidae (Coleoptera). 2. Immature stages and seasonal history with a review of Mymarid larvae

Parasitology ◽  
1961 ◽  
Vol 51 (3-4) ◽  
pp. 269-294 ◽  
Author(s):  
Dorothy J. Jackson
Keyword(s):  
Single Cells ◽  
Instar Larva ◽  
Host Larva ◽  
Immature Stages ◽  
Larval Stages ◽  
First Instar ◽  
Commonwealth Institute ◽  
Last Stage ◽  
Host Embryo ◽  
Seasonal History

The immature stages of Caraphractus cinctus Walker are described.Four larval stages have been observed which may correspond to three or four instars. In no stage have mandibles been observed.The first-instar larva is elongated and active. In the second-instar oral lobes are present. In the next stage the larva becomes shapeless and rather transparent. In the last stage the wall of the mid-gut shows conspicuous opaque spots which consist of single cells containing spherical concretions, probably the products of excretion.These concretions later become free in the gut of the pupa and are discharged in the meconium when the imago emerges from the host egg.The effects of parasitism on the host eggs of different ages is discussed. In newly laid host eggs all the contents are consumed by the parasitic larvae. In advanced eggs of Agabus the egg of Caraphractus is laid in the mid-gut of the host embryo where the parasitic larva develops, the hard parts of the host larva remaining intact. Parasitism in advanced eggs of Dytiscus is rarely successful.The larvae of other Mymaridae are discussed and their main features compared. The first-instar larva of Caraphractus does not correspond to any of the previously described types of mymarid larvae.The seasonal history is described, with the sequence of hosts parasitized throughout the year. From four to six generations of Caraphractus have been bred indoors during the year. The winter is passed as a diapausing prepupa. In some cases diapause may be prolonged. Fertility is high: 121 imagines have been bred from one female of Caraphractus.I have much pleasure in acknowledging my gratitude to the late Dr W. D. Hincks for his kindness in reading the typescript of this paper: the comments by such a well-known authority on Mymaridae have been most valuable. I am very grateful to Mr O. Bakkendorf for allowing me to reproduce several of his figures of Mymarid larvae from the valuable work he devoted to the biology of Danish hymenopterous egg-parasites. I am also grateful to Miss B. A. Trott of the Commonwealth Institute of Entomology for the help she has so kindly given me with references.

scholarly journals First instar larvae of endemic Australian Miltogramminae (Diptera: Sarcophagidae)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Krzysztof Szpila ◽  
Kinga Walczak ◽  
Nikolas P. Johnston ◽  
Thomas Pape ◽  
James F. Wallman
Keyword(s):  
Laser Scanning ◽  
Instar Larva ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Maxillary Palpus ◽  
Larval Morphology ◽  
First Instar ◽  
Morphological Differences ◽  
Thoracic And Abdominal ◽  
First Time

AbstractThe first instar larva of a species of the Australian endemic genus Aenigmetopia Malloch is described for the first time, along with the first instar larvae of three other Australian species representing the genera Amobia Robineau-Desvoidy and Protomiltogramma Townsend. Larval morphology was analysed using a combination of light microscopy, confocal laser scanning microscopy and scanning electron microscopy. The following morphological structures are documented: pseudocephalon, antennal complex, maxillary palpus, facial mask, modifications of thoracic and abdominal segments, anal region, spiracular field, posterior spiracles and details of the cephaloskeleton. Substantial morphological differences are observed between the three genera, most notably in the labrum and mouthhooks of the cephaloskeleton, sensory organs of the pseudocephalon, spinulation, sculpture of the integument and form of the spiracular field. The first instar larval morphology of Aenigmetopia amissa Johnston, Wallman, Szpila & Pape corroborates the close phylogenetic affinity of Aenigmetopia Malloch with Metopia Meigen, inferred from recent molecular analysis. The larval morphology of Amobia auriceps (Baranov), Protomiltogramma cincta Townsend and Protomiltogramma plebeia Malloch is mostly congruent with the morphology of Palaearctic representatives of both genera.

The Hydraenidae of Cuba (Insecta: Coleoptera) II: Morphology of preimaginal stages of six species and notes on their biology

Zootaxa ◽  
2017 ◽  
Vol 4238 (4) ◽  
pp. 451 ◽  
Author(s):  
ALBERT DELER-HERNÁNDEZ ◽  
JUAN A. DELGADO
Keyword(s):  
Instar Larva ◽  
Morphological Characters ◽  
Larval Instars ◽  
First Instar ◽  
Preimaginal Stages ◽  
First Time ◽  
Third Instar Larvae

Preimaginal stages of the six species of Hydraenidae presently known from Cuba were obtained by rearing adults in the laboratory. Eggs of Hydraena perkinsi Spangler, 1980, H. decui Spangler, 1980 and H. franklyni Deler-Hernández & Delgado, 2012 are described and illustrated for the first time. The first instar larva of Gymnochthebius fossatus (LeConte, 1855) is redescribed, adding some new remarkable morphological characters including what could be the first abdominal egg-burster reported for this family. All larval instars of H. perkinsi, H. guadelupensis Orchymont, 1923 and Ochthebius attritus LeConte, 1878 are described and illustrated for the first time, with a special emphasis on their chaetotaxy. The second instar larva of G. fossatus along with first and third instar larvae of H. decui and H. franklyni are also studied for the first time. The pupal morphology and vestiture of a species belonging to the genus Hydraena are described for the first time, based on the pupa of H. perkinsi. Biological notes for several preimaginal stages of the studied species are also given. 

STUDIES ON DIPTEROUS PARASITES OF THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (CLEM.) (LEPIDOPTERA.TORTRICIDAE): VI. PHOROCERA INCRASSATA SMITH (DIPTERA:TACHINIDAE)

1958 ◽  
Vol 36 (4) ◽  
pp. 453-462 ◽  
Author(s):  
H. C. Coppel
Keyword(s):  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Immature Stages ◽  
Eastern Canada ◽  
First Instar

Phorocera incrassala Smith, which was transferred from Western to Eastern Canada for release against the spruce budworm, Choristoneura fumiferana (Clem.), deposits microtype eggs on leaves, which are later ingested by the host. Eggs hatch immediately after ingestion, but the parasite does not develop beyond the first instar until the host pupates. The larva then develops rapidly, matures in 10 days, and forms its puparium within the host pupal case. The adult emerges in 12 to 14 days. No information is available on the overwintering habits. Among the important characters for identifying the immature stages of P. incrassala are the buccopharyngeal apparatus and the anterior and posterior spiracles.

The comparative morphology of the male and female postabdomen of the Australian Tachinidae (Diptera), with descriptions of some first-instar larvae and pupae

1988 ◽  
Vol 2 (1) ◽  
pp. 81 ◽  
Author(s):  
BK Cantrell
Keyword(s):  
Comparative Morphology ◽  
Instar Larva ◽  
Taxonomic Position ◽  
Specific Level ◽  
Male And Female ◽  
First Instar ◽  
New Information ◽  
The Family ◽  
First Time

The comparactive morphology of the male and female postabdomen of the Australian Tachinidae was studied in a survey which included 152 species of representative genera from all subfamilies except Dufouriinae. The value of the structure of the postabdomen for the higher classification of the family was ascertained, and new information gained which has allowed a better understanding of the correct taxonomic position of some problem groups of tachinids. It was possible to recognise suites of characters for each sex to define each subfamily, but this was not possible at tribal or generic levels in most groups. The male terininalia are diagnostic at specific level. The survey also allowed the discovery of, or confirmed, the reproductive habit of the included genera and provided information on the first-instar larva of 52 species, many of which larvae are described below for the first time. Characters of puparia which may have taxonomic value are discussed and illustrated.

scholarly journals Morphology of immature stages of Helophorus (Gephelophorus) auriculatus (Coleoptera, Helophoridae)

2020 ◽  
Vol 60 (1) ◽  
pp. 319-332 ◽  
Author(s):  
Yusuke N. Minoshima ◽  
Reiya Watanabe
Keyword(s):  
Head Capsule ◽  
Immature Stages ◽  
Taxonomic Character ◽  
Larval Instars ◽  
Larval Stages ◽  
First Instar ◽  
Egg Case ◽  
Morphological Transformations

The morphology of immature stages of Helophorus (Gephelophorus) auriculatus Sharp, 1884 is described. This is the first description of the larva and pupa of the subgenus Gephelophorus Sharp, 1915. We describe the morphology of the egg-case, all larval stages (first to third instar, including chaetotaxy of the head) and pupa. Morphological transformations between larval instars were examined. Head chaetotaxy was nearly identical between instars. Ventral teeth on the nasale, considered as a useful taxonomic character, were absent in the first instar but well developed in later instars. Chaetotaxy differed among the subgenera Gephelophorus, Helophorus and Lihelophorus in the length and shape of setae on head capsule and maxilla. Pupal morphology was similar to that of previously described pupae: H. (Helophorus) aquaticus (Linnaeus, 1758) and H. (Rhopalohelophorus) orientalis Motschulsky, 1860. A key to families of the Hydrophiloidea of Japan based on larval characters is provided.

scholarly journals Description of the puparium of Cyphomyia albitarsis (Diptera: Stratiomyidae: Clitellariinae) from Colombia

2019 ◽  
Vol 59 (2) ◽  
pp. 555-560
Author(s):  
Juliana Torres-Toro ◽  
Marta Wolff
Keyword(s):  
Instar Larva ◽  
Immature Stages ◽  
First Time

Abstract The puparium of Cyphomyia albitarsis (Fabricius, 1805) is described and illustrated for the first time, based on six puparia, of which five emerged into adults. In Cyphomyia Wiedemann, 1819, the immature stages (6th instar larva or puparia) of only eight species are known (Cyphomyia aurifrons Wiedemann, 1830, C. bicarinata Williston, 1900, C. erecta Mc-Fadden, 1969, C. leucocephala Wiedemann, 1819, C. marginata Loew, 1866, C. picta Schiner, 1868, C. pilossisima Gerstaecker, 1857, and C. souzalopesi Iide, 1967), which represents only 9% of the Cyphomyia species described. In addition, some features of the previously known immature stages of the genus are summarized and compared with the puparium of C. albitarsis.

scholarly journals On the immature stages of the crazy ant Paratrechina longicornis (Latreille 1802) (Hymenoptera: Formicidae)

Zootaxa ◽  
2007 ◽  
Vol 1503 (1) ◽  
pp. 1-11 ◽  
Author(s):  
EDUARDO GONÇALVES PATERSON FOX ◽  
DANIEL RUSS SOLIS ◽  
CARLOS MASSURETTI DE JESUS ◽  
ODAIR CORREA BUENO ◽  
ANTONIO TENIYOSHI YABUKI ◽  
...  
Keyword(s):  
Original Description ◽  
Immature Stages ◽  
Larval Instars ◽  
Larval Stages ◽  
The World ◽  
Paratrechina Longicornis ◽  
First Time ◽  
Evident Variation ◽  
Third Instar Larvae

The ant Paratrechina longicornis is a cosmopolitan ant species that has been accidentally spread by commerce around the world, and now is a pest of houses and hospitals. The morphology of its larval stages has been previously described without knowledge of the number of instars. The present study revisits the original description of P. longicornis larvae by adding differences observed among the three larval instars. Compared to other Paratrechina species studied so far, P. longicornis presents smaller larvae, less evident variation in mandible morphology, and clear variation in the morphology of head hairs between the analysed specimens of the second and third instar larvae. Ultrastructural images of the eggs, larval spiracle ornamentation, and pupae are also presented for the first time.

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