scholarly journals Antennal and palpal sensilla of three predatory Lispe species (Diptera: Muscidae): an ultrastructural investigation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Genting Liu ◽  
Qike Wang ◽  
Xianhui Liu ◽  
Xinyu Li ◽  
Xiunan Pang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sexual Dimorphism ◽  
Feeding Habits ◽  
Visual Signal ◽  
Chemical Signal ◽  
Basiconic Sensilla ◽  
Unique Character ◽  
Maxillary Palps ◽  
Scanning Electron

AbstractAntennae and maxillary palps are the most important chemical reception organs of flies. So far, the morphology of antennae and maxillary palps of flies of most feeding habits have been well described, except for that of relatively rare aquatic predatory species. This study describes sensilla on antennae and maxillary palps of three aquatic predatory Lispe species: Lispe longicollis, L. orientalis and L. pygmaea. Types, distribution, and density of sensilla are characterised via light and scanning electron microscopy. One type of mechanoreceptors is found on antennal scape. Mechanoreceptors (two subtypes) and one single pedicellar button (in L. pygmaea) are located on antennal pedicel. Four types of sensilla are discovered on antennal postpedicel: trichoid sensilla, basiconic sensilla (three subtypes), coeloconic sensilla and clavate sensilla. A unique character of these Lispe species is that the coeloconic sensilla are distributed sparsely on antennal postpedicel. Mechanoreceptors and basiconic sensilla are observed on the surface of maxillary palps in all three species. We demonstrated clear sexual dimorphism of the maxillary palps in some of the Lispe species, unlike most other Muscidae species, are larger in males than females. This, along with their courtship dance behaviour, suggest their function as both chemical signal receiver and visual signal conveyer, which is among the few records of a chemical reception organ act as a signal conveyer in insects.

scholarly journals Fine Structure of Maxillary Palps in Adults of Hermetia illucens (Diptera: Stratiomyidae)

2020 ◽  
Author(s):  
M Pezzi ◽  
C Scapoli ◽  
M Bharti ◽  
M J Faucheux ◽  
M Chicca ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sexual Dimorphism ◽  
Hermetia Illucens ◽  
The Family ◽  
Sensory Structures ◽  
First Time ◽  
Maxillary Palps ◽  
Scanning Electron

Abstract A relevant species in waste management but also in forensic, medical, and veterinary sciences is the black soldier fly, Hermetia illucens (Linnaeus; Diptera: Stratiomyidae). An ultrastructural study by scanning electron microscopy (SEM) was conducted for the first time on maxillary palps of both sexes, describing in detail the morphology and distribution of sensilla and microtrichia. The maxillary palps, composed of two segments, show sexual dimorphism in length and shape. In both sexes, the first segment is covered only by microtrichia, but the second one is divided into two parts: the proximal one, covered only by microtrichia, and the distal one containing both microtrichia and sensory structures. These structures include two types of sensory pits and one of chaetic sensilla. Due to sexual dimorphism in palp size, females have a higher number of sensory pits. The sexual dimorphism of palps and the presence and role of sensilla in H. illucens was discussed in comparison to other species of the family Stratiomyidae and of other Diptera. This study may represent a base for further investigations on mouthpart structures of this species, involved in key physiological activities, such as feeding, mating and oviposition.

scholarly journals First definitive record of a whip scorpion Labochirus tauricornis (Pocock, 1900) from Goa, India: with notes on its morphometry and pedipalp micro-morphology

2018 ◽  
Vol 10 (7) ◽  
pp. 11955
Author(s):  
Manoj Ramakant Borkar
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sexual Dimorphism ◽  
Diagnostic Value ◽  
The State ◽  
Diagnostic Data ◽  
Micro Morphology ◽  
Scanning Electron

Bastawade & Borkar in 2008 made a passing reference to the presence of a single uropygid species in Goa, though without much primary diagnostic data on the collected specimen of four females.  The present study puts in place a definitive record of the uropygid, Labochirus tauricornis Pocock, (1900) in the state of Goa, and addresses an important gap in our understanding of its occurrence, morphology, and ecology. Besides documenting the species of this cryptozoic, nocturnal arachnid predator commonly known as ‘Vinegaroon’ on account of their vinegary allomone spray; the present study also describes the gross morphology , morphometry and micro-morphology of non-ambulatory sub-raptorial pedipalps which are of taxonomic-diagnostic value, elucidated using scanning electron microscopy, in addition to routine stereomicroscopy. The paper also examines in detail, sexual dimorphism and morphometry of this uropygid species. 

Ultrastructural Analysis of Mouthparts of Adult Horn Fly (Diptera: Muscidae) From the Brazilian Midwest Region

2020 ◽  
Vol 57 (5) ◽  
pp. 1447-1458 ◽  
Author(s):  
Fernando de Freitas Fernandes ◽  
Ana Cristina Bahia ◽  
Nágila Francinete Costa Secundino ◽  
Paulo Filemon Paolucci Pimenta
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Morphological Characteristics ◽  
Sense Organs ◽  
Horn Fly ◽  
Phylogenetic Studies ◽  
Midwest Region ◽  
Well Differentiated ◽  
Maxillary Palps ◽  
Scanning Electron

Abstract The ultrastructure of the mouthparts of Haematobia irritans (L.) was investigated by scanning electron microscopy. The morphological characteristics of the maxillary palps, labium (prementum and postmentum), labrum, hypopharynx, haustellum, and labellar lobes are described, as well as of the sensilla evidenced on all the surface of the mouthparts, and the set of different positions assumed by the mouth apparatus of this fly. Based on their morphology, 12 well-differentiated sensilla were identified, among three types of cuticular sensilla: trichoidea, coeloconica, and campaniformia. A slight sexual dimorphism in the sensilla patterns found in the mouthparts of H. irritans was evidenced. These observations are discussed with reference to the current literature on the functional morphology of sense organs of Insecta. These results could facilitate the recognition of the chemosensory sensilla by electrophysiological techniques, and foment future taxonomic and phylogenetic studies to better elucidate the evolution of Diptera, Muscomorpha.

Scanning electron microscopy of the pit of the maxillary palp of selected species of Culicoides

1972 ◽  
Vol 50 (9) ◽  
pp. 1207-1210 ◽  
Author(s):  
Wayne A. Rowley ◽  
Marcia Cornford
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Maxillary Palp ◽  
Large Mammals ◽  
The Third ◽  
Interspecific Differences ◽  
Culicoides Variipennis ◽  
Maxillary Palps ◽  
Scanning Electron

The pits on the third segment of the maxillary palps of Culicoides variipennis, C. obsoletus, C. crepuscularis, C. haematopotus, and C. guttipennis were studied with the scanning electron microscope. The size and shape of the palpal pits and the type and number of sensilla were determined for females of each species and for males of C. variipennis and C. crepuscularis. The bulb-shaped sensilla are remarkably similar in all species, but there are considerable interspecific differences in the size of the pits and in the number of sensilla. The two species that normally feed on large mammals (C. obsoletus and C. variipennis) have significantly fewer sensilla per pit than do species considered ornithophilic. Also, males have fewer sensilla than do females of the same species.

scholarly journals A comparative study of the proventricular structure in twenty Chinese Tettigoniidae (Orthoptera) species

2012 ◽  
Vol 23 (3) ◽  
Author(s):  
Yinliang Wang ◽  
Yuetian Su ◽  
Xue Zhang ◽  
Na Li ◽  
Bingzhong Ren
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Comparative Study ◽  
Alimentary Canal ◽  
Feeding Habits ◽  
Future Studies ◽  
Carnivorous Species ◽  
Herbivorous Species ◽  
Scanning Electron

This study focuses on the proventriculus and the alimentary canal of twenty Tettigoniidae species among three subfamilies, Tettigoniinae, Phaneropterinae and Conocephalinae. Each part of the alimentary canal and the inner structure of proventriculus were examined under optic microscope and scanning electron microscopy. As a result, the length of each part of the alimentary canal and the inner structure of proventriculus were highly associated with feeding habits. Carnivorous species always had a short foregut and long cilia on the base of the sclerotized appendix in proventriculus, whereas herbivorous species always had a longer foregut and a highly sclerotized proventriculus. These results increase understanding of the alimentary canal in Tettigoniidae and will be useful in future studies of their feeding habits.

scholarly journals Chaetotaxy and setal diversity of grooming legs in species of porcelain crabs (Crustacea: Anomura: Porcellanidae)

2018 ◽  
Vol 58 ◽  
pp. 8 ◽  
Author(s):  
Luciane Augusto de Azevedo Ferreira ◽  
Marcos Tavares
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sexual Dimorphism ◽  
Male And Female ◽  
Petrolisthes Armatus ◽  
Porcelain Crabs ◽  
Scanning Electron

The morphology of the fifth pereiopods was studied under scanning electron microscopy in ten species of porcelain crabs for chaetotaxy and setal diversity, namelly Megalobrachium pacificum, Megalobrachium roseum, Pachycheles grossimanus, Petrolisthes armatus, Petrolisthes tuberculatus, Pisidia brasiliensis, Pisidia longicornis, Polyonyx gibbesi, Porcellana platycheles and Porcellana sayana. Six setal types were identified: simple, pappose, sickle-shaped serrate, straight serrate, club-shaped and tooth-like cuspidate. Porcelain crabs can differ in the fifth pereiopod setal morphology, chaetotaxy and setal density, even among species within the same genus. The absence of sexual dimorphism of the grooming legs in porcelain crabs suggests that grooming eggs requires no particular grooming apparatus in females and that male and female are equal in grooming efficiency.

Xyala finneyae sp. n. (Nematoda: Xyalidae) from the intertidal region of the eastern Gulf of California, Mexico

Nematology ◽  
2010 ◽  
Vol 12 (5) ◽  
pp. 673-680 ◽  
Author(s):  
Ian King ◽  
Manuel Mundo-Ocampo ◽  
Paul De Ley
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Sexual Dimorphism ◽  
Intertidal Zone ◽  
Gulf Of California ◽  
Type Species ◽  
Optical Section ◽  
Anterior Position ◽  
Scanning Electron

Abstract Xyala finneyae sp. n. from the intertidal zone in the northern Gulf of California, Mexico, is described using light and scanning electron microscopy. The new species is characterised by the first ring of cuticular crests being at least twice as long as the crests on the remaining annules, vulva at 70-76% of body length from anterior end, sexual dimorphism in amphid fovea size with females having a smaller amphidial opening. Xyala finneyae sp. n. is most similar to the type species, X. striata, and to X. oxybiotica. It differs from the former in having the first ring of crests markedly longer than all subsequent ones, in having shorter outer labial and cephalic setae on the lip region (8-9 and 15-18 vs 12 and 22 μm, respectively), in a more anterior position of vulva (V = 70-76 vs 79-81) and in shorter spicules (29-31 vs 44-47 μm). From X. oxybiotica, it differs in the more spherical lip region with thinner cuticle on the lips (vs lips more protruding anteriad and with thicker cuticle in optical section), shorter outer labial and cephalic setae on the lip region (8-9 and 15-18 vs 13 and 23 μm, respectively), a more anterior vulva (V = 70-76 vs 81-89) and shorter spicules (29-31 vs 35 μm).

Sexual dimorphism in Sitophilus granarius (L.) as viewed in the scanning electron microscope

1971 ◽  
Vol 49 (4) ◽  
pp. 579-580 ◽  
Author(s):  
Averett S. Tombes
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Sexual Dimorphism ◽  
Horizontal Plane ◽  
Longitudinal Axis ◽  
The Body ◽  
Sitophilus Granarius ◽  
Granary Weevil ◽  
Scanning Electron

The morphological features of the granary weevil, Sitophilus granarius (L.), which are used in sexing the adults, were studied by scanning electron microscopy. The rostrum of the female is nearly 10% longer and 15% thinner than that of the male. The terminal segments of the male's abdomen are deflected downward about 30° from the longitudinal axis of the body while the tip of the female's abdomen remains close to the horizontal plane of the body.

Sign in / Sign up

Export Citation Format

Share Document