Lepidoptera genitalia

About: Lepidoptera genitalia is a research topic. Over the lifetime, 10114 publications have been published within this topic receiving 78876 citations. The topic is also known as: Uncus.

ISSR (inter simple sequence repeats) as genetic markers in noctuids (Lepidoptera).

Abstract: Microsatellites among Lepidoptera are poorly known We have shown that some ISSR amplifications are possible and demonstrate their applicability in studying intraand inter-specific variation in some Noctuid populations The Lepidoptera are sensitive to habitat and climatic change (HARPER et al 2000) We analyse Noctuid populations in natural and disturbed habitats in the Pyrenees (France) We have attempted to find a versatile method that can be used in species determination, and, to demonstrate small genetic differences, in the nuclear genome of moths Compared to other groups of animals relatively few microsatellite studies have been carried out with Lepidoptera (NEVE and MEGLECZ 2000) Only few studies involve ISSR (REDDY et al 1999) One reason was that it has been assumed that microsatellites are lacking or are very rare in Lepidoptera However, MEGLECZ and SOLIGNAC (1998) and HARPER et al (2000) have successfully localised (CA)n repeats in insect microsatellites We found that: (i) (CA)n primer gives the most informative profiles; (ii) DNA profiles between species differ substantially; (iii) comparison of ISSR profiles can be successfully applied to study intra-specific variation

The Developmental Physiology of Color Patterns in Lepidoptera

Abstract: Publisher Summary The Lepidoptera are a fairly recent and monophyletic taxon and, next to the Coleoptera, perhaps the largest such taxon among living things. The attractive feature of lepidopteran color patterns is that they develop in a tissue that is essentially a two-dimensional monolayer of cells in which there is neither significant growth nor cell movement. The wing is a tissue that is nonessential for the proper development and survival of the individual so that it can be manipulated with a considerable amount of freedom. The majority of color patterns are patterns of melanin deposition. The color pattern on the wings of Lepidoptera resides exclusively in the scales. The cuticle of the wing is colorless or brownish and transparent. Most whites, almost all blues, and all iridescent (metallic) colors on lepidopteran wings are structural. The majority of chemical pigments (zoochromes) that have been found in the wings of Lepidoptera belong to four categories: melanins, pterins, flavonoids, and ommochromes.

Conservation of Silk Genes in Trichoptera and Lepidoptera

Abstract: Larvae of the sister orders Trichoptera and Lepidoptera are characterized by silk secretion from a pair of labial glands. In both orders the silk filament consists of heavy (H)- and light (L)-chain fibroins and in Lepidoptera it also includes a P25 glycoprotein. The L-fibroin and H-fibroin genes of Rhyacophila obliterata and Hydropsyche angustipennis caddisflies have exon/intron structuring (seven exons in L-fibroin and two in H-fibroin) similar to that in their counterparts in Lepidoptera. Fibroin cDNAs are also known in Limnephilus decipiens, representing the third caddisfly suborder. Amino acid sequences of deduced L-fibroin proteins and of the terminal H-fibroin regions are about 50% identical among the three caddisfly species but their similarity to lepidopteran fibroins is <25%. Positions of some residues are conserved, including cysteines that were shown to link the L-fibroin and H-fibroin by a disulfide bridge in Lepidoptera. The long internal part of H-fibroins is composed of short motifs arranged in species-specific repeats. They are extremely uniform in R. obliterata. Motifs (SX)n, GGX, and GPGXX occur in both Trichoptera and Lepidoptera. The trichopteran H-fibroins further contain charged amphiphilic motifs but lack the strings of alanines or alanine-glycine dipeptides that are typical lepidopteran motifs. On the other hand, sequences composed of a motif similar to ERIVAPTVITR surrounded by the (SX)4-6 strings and modifications of the GRRGWGRRG motif occur in Trichoptera and not in Lepidoptera.

Laboratory Assessment of the Effects of Bacillus thuringiensis on Native Lepidoptera

Abstract: The effect of 2 formulations of Bacillus thuringiensis subsp. kurstaki (Foray 48B and Dipel 8AF) was evaluated on 42 species of native Lepidoptera in laboratory bioassays using instars that are present in the field at the time of gypsy moth suppression applications. Mortality was significant for 27 of the 42 species evaluated against Foray 48B, and 8 of 14 species evaluated against Dipel 8AF. Susceptible species were noted in 5 of 6 families assayed—Papilionidae, Nymphalidae, Geometridae, Lasiocampidae, Saturniidae, and Noctuidae. The 1 species treated in the Lymantriidae family was not susceptible to B. thuringensis . Treated individuals that survived for a week were likely to reach adulthood. Intrageneric differences in susceptibility to B. thuringiensis were recorded among 8 species of Catocala and 3 species of Lithophane assayed. Of the 18 species assayed as 1st or 2nd instars, mortality was significant, usually exceeding 95%. By contrast, 9 of 11 species not susceptible to B. thuringiensis were assayed as penultimate or ultimate instars. However, species susceptible to B. thuringiensis were found in both early and late instars.