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The present study describes Gnominthus, a new genus of Eneopterinae crickets from New Guinea Island (Papua New Guinea), which belongs to the tribe Lebinthini. Descriptions focus on general morphology, male and female genitalia, and forewing venation. Bioacoustical analyses of the calling song and the description of the mating behavior are also provided. The novelties found here increase the idea hypothesized...
Whether mutualisms persist or vanish during the course of evolution depends on the cost-benefit ratio for the species involved. In the interaction between the pitcher plant Nepenthes hemsleyana and the bat Kerivoula hardwickii both partners mutually benefit: N. hemsleyana offers high quality roosts in exchange for nutrients from the bats’ faeces. Here, we tested the hypothesis that the partners should...
The fundatrices of the five species of Periphyllus (Hemiptera: Aphididae) living on Acer platanoides, Norway maple, in Poland have been morphologically studied and fundatrices of two species described for the first time. A discriminant analysis of the morphometric data of the fundatrices shows the most important morphometric characters separating these species. An identification key is provided.
Systematic sampling of the Mesovoid Shallow Substratum (MSS) at several sites in three regions of the Iberian Peninsula has revealed two new and one very poorly known species of the genus Archipolydesmus Attems, 1898. These are the first records of Archipolydesmus in the MSS, although the genus had previously been recorded from several caves in southern Spain. Archipolydesmus foliatus sp. nov. shows...
The ultrastructure of spermiogenesis in four species of Coccoidea, namely Quadraspidiotus perniciosus and Pseudaulacaspis pentagona (Diaspididae), as well as Planococcus citri and Planococcus ficus (Pseudococcidae), is described. Similarly to other coccids, during spermiogenesis sperm nuclei elongate towards the plasma membrane, forming a conical papilla. The microtubule bundles surrounding the nucleus...
Maximum entropy modeling for predicting the potential suitability distribution of species using presence-only occurrence records and associated environmental factors is one of the most widely used tools in ecology and biogeography. The aim of this study is to identify the potential suitable habitat for 17 Italian endemic species of flea beetles (Coleoptera, Chrysomelidae) by assessing which environmental...
Morphology of Malpighian tubules from fourteen representatives in Cicadoidea and Cercopoidea are investigated. Among which the distal segments that perform a modified glandular function during nymphal stages are investigated in particular using both scanning and transmission electron microscopies. The examined species show regional differentiation along the Malpighian tubules. The terminal parts end...
Karyological studies continue to clarify the evolutionary history of many taxa. We report here on the first chromosome survey of the frog Pseudhymenochirus merlini (Pipidae) in comparison with the related species Hymenochirus boettgeri.In addition to the 2n=20 regular (A) chromosomes (eight metacentric and two subtelocentric pairs), H. boettgeri has an accessory B chromosome in about half of the scored...
External and internal penile morphologies have evolved rapidly and divergently in many mammalian orders and are extremely useful for taxonomic studies, particularly in the recovery of phylogenetic relationships. Eptesicus furinalis, a Vespertilionid bat, belongs to a taxon in which species recognition can be difficult when only traditional features are employed. Therefore, any feature that may contribute...
Tentacular organs comprise a variety of body projections that have specialized functions in several invertebrate phyla. In bivalve mollusks, tentacles of the mantle margin serve sensorial and secretory functions involved in predator detection and interactions with the surrounding environment. However, their morphological diversity, detailed anatomy, and functional roles have only been scarcely investigated...
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