{"title":"Ultrastructure of the natural and factitious host eggs of Trichogramma galloi Zucchi and Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae)","authors":"F.L Cônsoli , E.W Kitajima , J.R.P Parra","doi":"10.1016/S0020-7322(99)00026-4","DOIUrl":"10.1016/S0020-7322(99)00026-4","url":null,"abstract":"<div><p>The surface and structure of the chorion of eggs of <em>Diatraea saccharalis</em> (F.) (Lepidoptera: Crambidae), <em>Anticarsia gemmatalis</em> (Huebner), <em>Heliothis virescens</em> F., <em>Spodoptera frugiperda</em> (Smith) (Lepidoptera: Noctuidae), <em>Sitotroga cerealella</em> (Oliver) (Lepidoptera: Gelechiidae), <em>Ephestia kuehniella</em> Zeller and <em>Corcyra cephalonica</em> Stainton (Lepidoptera: Pyralidae), that are hosts of <em>Trichogramma galloi</em> Zucchi and <em>Trichogramma pretiosum</em> Riley (Hymenoptera: Trichogrammatidae) were studied on SEM and TEM. Other characteristics of these eggs, such as changes in their color during embryonic development, size and volume were also recorded. Sculpturing and texture of the surface of the chorion greatly varied among the species studied, as well as the number of layers of the chorion and their thickness. Eggs of the factitious hosts were among the smallest and their volume was very close to each other. All these characteristics would provide basic information for a better understanding of the host selection behavior and are useful for the development of a suitable artificial host egg for the in vitro rearing of these egg parasitoids.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 3","pages":"Pages 211-231"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(99)00026-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82290350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reproductive morphology, copulation, and inter-populational variation in the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae)","authors":"K.A Justus, B.K Mitchell","doi":"10.1016/S0020-7322(99)00027-6","DOIUrl":"10.1016/S0020-7322(99)00027-6","url":null,"abstract":"<div><p>Copulatory mechanisms and internal reproductive systems of male and female <em>Plutella xylostella</em> (L.) were investigated. Both male and female specimens exhibited characteristics typical of ditrysian Lepidoptera, with some peculiarities. Female structures appear to be relatively simple: the bursa copulatrix lacks cuticular signa within, the spermatheca lacks lagenar arms exhibited in some Lepidoptera, and colleterial glands have secretory system and reservoir combined. Male accessory gland ducts are joined distally, a condition that has not been described in other Lepidoptera. Genitalia of both sexes appear simple; females possess a posterior cuticular extension of abdominal sternites that houses the bursal duct and accomodates the needle-like aedeagus of a male during copulation. Despite the apparent simplicity, configuration of genitalia is highly specific in shape, angle, and size, which is likely to be important in maintaining reproductive isolation within the species. However, a population of <em>P. xylostella</em> from Australia showed some modification to both aedeagal and bursal structures. These variations suggest some important implications for considering species with worldwide distributions.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 3","pages":"Pages 233-246"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(99)00027-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74445957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Accessory hemolymph pump in the mesothoracic legs of locusts, (Schistocerca gregaria forskal) (Orthoptera, Acrididae)","authors":"Reinhold Hustert","doi":"10.1016/S0020-7322(99)00010-0","DOIUrl":"10.1016/S0020-7322(99)00010-0","url":null,"abstract":"<div><p>An accessory pulsatile organ located in the mesothoracic legs pumps hemolymph towards the tip of the leg ventrally and towards the body near the dorsal side. It consists of a muscle attached to the ventral side of the trochanter and to the central region of a transverse connective tissue diaphragm located at the trochanter-femur border. The diaphragm has a ventral outlet that permits efferent hemolymph flow through a narrow femoral sinus. A second dorsal outlet allows the afferent countercurrent back to the thorax through a separate hemolymph channel. During abdominal ventilation, the pumping rhythm of the leg<span>fn2</span>heart is neurally synchronized with abdominal ventilation. Expiratory pressure expands tracheal air sacs in the ventral trochanter and helps driving hemolymph out of this space. In idle periods of resting ventilation, an autonomous myogenic rhythm of the leg–heart can maintain hemolymph circulation in the mesothoracic leg without neural control.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 1","pages":"Pages 91-96"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(99)00010-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74232888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Michael Friedlander , Rina Eren Jeger , Clarke H Scholtz
{"title":"Intra-follicular visceral musculature in Omorgus freyi (HAAF) (Coleoptera: Trogidae) testes","authors":"Michael Friedlander , Rina Eren Jeger , Clarke H Scholtz","doi":"10.1016/S0020-7322(98)00030-0","DOIUrl":"10.1016/S0020-7322(98)00030-0","url":null,"abstract":"<div><p>The testicular follicles of the desert-adapted beetle <em>Omorgus freyi</em> (Haaf) (Coleoptera : Trogidae) are unusually large, relative to male size. The advance of the sperm-producing cells towards the efferent duct and, eventually, that of spermatozoa to the deferent duct, is apparently facilitated by the unique structure of these extended follicles. In contrast to the typical insect follicle, those of <em>O. freyi</em> and other scarabaeoid beetles have an internalized and elongated efferent duct. But, additionally, in <em>O. freyi</em>, the follicles are subdivided by longitudinal septa, radiating from the central efferent duct. A net of slow-supercontracting visceral muscles extends throughout the septa and efferent duct. We hypothesize that this unique structure is an adaptation maximizing reproductive potential by mobilizing large numbers of spermatozoa throughout the huge testes and transferring them to the female during the irregular short bouts of reproductive activity following the unpredictable rainfall.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 1","pages":"Pages 5-11"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(98)00030-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90955157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Circulatory organs of Diplura (Hexapoda): the basic design in Hexapoda?","authors":"Barbara-Amina Gereben-Krenn , Günther Pass","doi":"10.1016/S0020-7322(99)00008-2","DOIUrl":"10.1016/S0020-7322(99)00008-2","url":null,"abstract":"<div><p>The circulatory systems of <em>Campodea augens</em> and <em>Catajapyx aquilonaris</em> (Hexapoda: Diplura) have been examined by means of light and electron microscopy. Hemolymph flow has also been investigated in vivo. Both species share features that deviate conspicuously from the common textbook design of the insect circulatory system: (i) antennal vessels connected to the anterior end of the dorsal vessel; (ii) presence of a circumoesophageal vessel ring in the head; (iii) a bidirectional flow within the dorsal vessel, made possible by intracardiac valves; (iv) posterior end of the dorsal vessel tube opens into a caudal chamber connected to cercal vessels (in <em>Campodea</em>) or to cercal channels (in <em>Catajapyx</em>); (v) dorsal diaphragm barely realized, ventral diaphragm absent altogether, and (vi) legs without specific organs serving hemolymph circulation. Comparative analysis has revealed that these characters in Diplura represent the most plesiomorphic condition in the circulatory organs of all extant Hexapoda. In the basic evolutionary lineages of insects, some organ components have been lost and the peripheral vessels decoupled from the dorsal vessel; as a result, autonomous accessory pulsatile organs have evolved to supply hemolymph to long body appendages and a unidirectional hemolymph flow mode prevailed within the dorsal vessel.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 1","pages":"Pages 71-79"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(99)00008-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74477298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Antennal circulatory organ of Apis mellifera L. (Hymenoptera: Apidae) and other Hymenoptera: functional morphology and phylogenetic aspects","authors":"S Matus , G Pass","doi":"10.1016/S0020-7322(99)00011-2","DOIUrl":"10.1016/S0020-7322(99)00011-2","url":null,"abstract":"<div><p>The antennal circulatory organs of 38 species of Hymenoptera were investigated by means of serial semithin sections, SEM and TEM. In <em>Apis</em>, this organ consists of an unpaired ampulla from which blood vessels that extend into the antennae originate. The ampulla is a very delicate structure of elastic connective tissue. Its lumen communicates with the head hemocoel via numerous perforations in its wall. No specific ampulla muscles exist; contraction of pharynx dilators causes compression of the ampulla, whereby hemolymph is forced into the antennae.</p><p>An absence of directly-acting muscles is common to the functional morphologies of the antennal circulatory organ in all investigated Hymenoptera. Some anatomical characters of this organ, however, vary among taxa: (i) presence of one or two ampullae, (ii) optional dorsal hemolymph channel, which connects the ampulla with the dorsal vessel, (iii) optional ampulla pumping case formed by cuticular apophyses, and (iv) differences in shape and number of the ampulla openings. The distribution of these characters is discussed along the current views on the phylogeny of Hymenoptera. Comparison with other insect orders indicates an autapomorphic status for the basic functional morphology of the antennal circulatory organ in Hymenoptera.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 1","pages":"Pages 97-109"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(99)00011-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79374242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Heartbeat and body movement: roles in gas exchange in Galleria mellonella L. (Lepidoptera: Pyralidae) pupae","authors":"U Tartes , A Kuusik , A Vanatoa","doi":"10.1016/S0020-7322(99)00014-8","DOIUrl":"10.1016/S0020-7322(99)00014-8","url":null,"abstract":"<div><p>The objective of the present article is to analyse the role of heartbeat and body movements in respiratory function in <em>Galleria mellonella</em> L. (Lepidoptera: Pyralidae) pupae with clear gas exchange cycles. We did not find any direct evidence of co-ordination between heartbeat and respiration or body movements and respiration. Cyclic CO<sub>2</sub> output was independent of abdominal movements and heart pulsations during the entire pupal development. In young pupae, heart activity periods were independent of abdominal movements. In middle-aged pupae, there appeared a clear trend towards the coincidence of heartbeat periods with the periods of abdominal movements. In late pupae, the heart pulses and the contractions of body skeletal muscles were mostly synchronized. It may be suggested that the contractions of intersegmental somatic abdominal muscles support the heartbeat, and, in this way, the hemolymph flow is accelerated. The heart and circulatory action may facilitate gaseous diffusion in the tracheae.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 1","pages":"Pages 145-149"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(99)00014-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90921761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of the suboesophageal body during embryogenesis without diapause in Locusta migratoria (linnaeus) (Orthoptera: Acrididae)","authors":"Abboud Harrat , Sleiman Ihsan , Jeanne Schoeller-Raccaud","doi":"10.1016/S0020-7322(98)00029-4","DOIUrl":"10.1016/S0020-7322(98)00029-4","url":null,"abstract":"<div><p>The development and the ultrastructural changes of the suboesophageal body were studied during embryogenesis of <em>Locusta migratoria</em> (Orthoptera : Acrididae). The suboesophageal body develops from the mandibular coelomic cavities. It differentiates early, before the completion of germ band segmentation (stage IIIc), the other mesodermal cells remaining undifferentiated. The cells of the suboesophageal body rapidly develop a structure similar to that of nephrocytes. They consist of a peripheral transfer zone and a perinuclear zone, the site of synthesis and storage. Material absorbed by endocytosis is taken up by <em>α</em>-vacuoles, then stored in <em>β</em>-vacuoles. Golgi vesicles, tubules and vesicle complexes may be involved in the secretory activity of the cells. The activity of the suboesophageal body is maximal until stage VI, after katatrepsis, after which degeneration begins. Very few cells remain at eclosion and they are completely degenerated. The suboesophageal body may be involved in the regulation of embryonic haemolymph composition, and it develops according to its function. The suboesophageal body differentiates early and is thus functional when the haemolymph first forms in the subgerminative space. It degenerates after the differentiation of the pericardial cells and the fat body, which regulate haemolymph composition.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 1","pages":"Pages 27-39"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(98)00029-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83844537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dimorphic antennal systems in gynandromorphic honey bees, Apis Mellifera l. (Hymenoptera: Apidae)","authors":"Axel Brockmann , Dorothea Brückner","doi":"10.1016/S0020-7322(99)00017-3","DOIUrl":"10.1016/S0020-7322(99)00017-3","url":null,"abstract":"<div><p>Gynandromorphic honey bees, <em>Apis mellifera</em> (Hymenoptera: Apidae), were examined to determine characteristic morphological and anatomical features of the antennal system. The antennae of gynandromorphic individuals are predominantly worker or drone-like. Hybrid antennae, composed of female and male tissues, occur only rarely (7 out of 188 examined antennae). Depending on the mosaic pattern of the head, both antennae can be drone-like or worker-like, or one can be drone-like and the other worker-like. Examination of the antennal lobes of six characteristic specimens revealed that antennal lobes, which are innervated by drone-like antennae, always have drone-specific enlarged tracts and macroglomerular complexes, whereas antennal lobes innervated by worker-like antennae always are composed of normally sized glomeruli. Thus, there is a strict correlation between the sexual morphology of the antennae and the sexual organization of the antennal lobe neuropil. In one antennal lobe, innervated by a hybrid antenna, we found a hypertrophied glomerulus, certainly homologous to one of the macroglomerular complexes in drone-like antennal lobes.jy 1999 Elsevier Science Ltd. All rights reserved.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 1","pages":"Pages 53-60"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(99)00017-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72779467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Antennal sensilla of the click beetle, Melanotus villosus (Geoffroy) (Coleoptera: Elateridae)","authors":"E Merivee , M Rahi , A Luik","doi":"10.1016/S0020-7322(98)00032-4","DOIUrl":"10.1016/S0020-7322(98)00032-4","url":null,"abstract":"<div><p>The typology, number and placement of antennal sensilla of the click beetle <em>Melanotus villosus</em> (Geoffroy) (Coleoptera: Elateridae) were studied using scanning electron microscopy. On both the males and females the antennae are made up of the scape, pedicel and nine flagellomeres. Two types of basiconic sensilla, three types of trichoid sensilla, one type of styloconic sensilla, one type of chetoid sensilla, dome-shaped sensilla, grooved pegs, and Böhm sensilla all appear on the antennae of the beetles of both sexes, with the exception of trichoid sensilla type II, whose large number (average of 1635 hairs per antenna) was found only in male beetles. Sensilla trichodea type II evidently respond to the sex pheromone produced by the female beetle. Unlike the other two click beetles, studied up till now, <em>Agriotes obscurus</em> and <em>Limonius aeruginosus</em>, the trichoid and basiconic sensilla of <em>M</em>. <em>villosus</em>, whose proven or assumed function is olfactory, are located predominantly on the flagellomeres ventral extensions. It is assumed that the placement of the olfactory sensilla, mainly on the ventral side of <em>M</em>. <em>villosus</em>s antennae, and their more or less even distribution on the flagellomeres, can be seen as morphological adaptation of this species of insect, whose specific behavioural reaction of olfactory searching is flying, both before and after contact with an odour plume.</p></div>","PeriodicalId":100701,"journal":{"name":"International Journal of Insect Morphology and Embryology","volume":"28 1","pages":"Pages 41-51"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0020-7322(98)00032-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76457484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}