During a recent expedition in the moist lowland Chocó forests from Colombia, three species of Anaides Westwood, 1842 were collected. These specimens represent important extensions to their ...distribution and are notable records for the Chocó Biogeographic Region of Colombia, and for the country itself. Anaides fossulatus Westwood, 1842 is recorded for the first time in the Colombian Chocó region, Anaides planus Ocampo, 2006 is confirmed for Colombia, and the distribution of Anaides longeciliatus Balthasar, 1938 is extended to Colombia.
Acoustic behaviour plays a significant role in insect communications, but is rarely reported in their immature stages. Larvae of Lucanidae bear paired stridulatory organs on their thoracic legs, ...which could produce sounds as communicational signals. However, the species-specific differences on stridulatory organs and acoustic signals are far from fully investigated. In this study, the larval acoustic behaviours of three lucanid species, Lucanus dybowski, Prosopocoilus confucius and P. girafa were recorded and compared for the first time. The sound producing mechanism was described in detail based on video recordings, morphological observations, and acoustic analyses. The larvae of all three species are able to produce sounds by scraping the plectrum on the metatrochanter against the pars stridens on the mesocoxa during disturbance. The sounds exhibit species-specific differences in terms of acoustic parameters: the larvae of L. dybowski produce short-duration (140–200 ms), single-pulse and low-frequency (∼210 Hz) sounds; P. confucius produce long-duration (500–800 ms), triple-pulse and low-frequency (∼280 Hz) sounds; P. girafa produce long-duration (500–560 ms), double-pulse and low-frequency (∼260 Hz) sounds. The amounts and arrangements of the teeth on stridulatory organs also exhibit differences on specific level. The acoustic signals and stridulatory organs were compared using principal component analysis.
•Species-specific acoustic behaviours were discovered among three lucanid larvae.•Species-specific stridulatory organs were discovered among three lucanid larvae.•The sound producing mechanism was described based on morphological observations and acoustic analyses.•The acoustic signal differences were analyzed focused on the duration, down-time, and peak frequency.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
A new species, Haplophileurus germanamati, from the western slope of the Sierra Nevada de Santa Marta in Colombia, is described and illustrated. The new species is diagnosed by the presence of six to ...nine small punctures at the base of the first broad elytral interval, the glabrous pygidium, and the elongated paramers. A taxonomic key to the species of Haplophileurus is provided in both English and Spanish.
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BFBNIB, NMLJ, NUK, PNG, SAZU, UL, UM, UPUK
This study describes the antennal ultrastructure in Cyclocephala forsteri Endrodi, 1963, Cyclocephala melanocephala (Fabricius, 1775) and Cyclocephala tucumana Brethes, 1904 (Coleoptera: ...Scarabaeidae). Adult of Cyclocephala Dejean, 1821 specimens were collected using a light trap placed near a pasture area, segregated by gender, based on male-specific dilated pre-tarsomeres and preserved in 70% alcohol. Scanning electron microscopy (SEM) images of the antenna lamellae were obtained from ten specimens at Universidade Estadual Paulista (UNESP) in Ilha Solteira, SP, Brazil. We identified trichoid, chaetic, placoid, coeloconic, basiconic sensilla, and pores in antenna of all the species. Placoid sensilla were prevalent in the antennal lamellae. The antennae of C. forsteri females had 5,457 sensilla, of which 5,327 (97.62%) were placoid, 123 (2.25%) coeloconic, and seven (0.13%) basiconic, while the antennae of males showed 5,351 sensilla, with 5,238 (97.89%) being placoid, 100 (1.87%) coeloconic, and 13 (0.24%) basiconic. The antennae of C. melanocephala females presented 6,814 sensilla, with 6,581 (96.58%) being placoid, 231 (3.39%) coeloconic, and two (0.03%) basiconic; while those of males had 6,333 sensilla, with 6,023 (95.11%) being placoid and 310 (4.89%) coeloconic. Finally, the antennae of C. tucumana females had 1,981 sensilla, with 1,845 (93.13%) being placoid, 127 (6.42%) coeloconic, and nine (0.45%) basiconic; while the antennae of males had 3,756 sensilla, with 3,656 (97.34%) being placoid, 99 (2.64%) coeloconic, and one (0.02%) basiconic. Overall, adults of C. melanocephala and C. tucumana presented dimorphism in the antennal sensilla.
Bolbapium Boucomont, 1910 is a Neotropical genus of Geotrupidae with 22 known species. In this paper, we describe Bolbapium vazdemelloi sp. nov. in Southwestern Bahia, Brazil. This new species is ...distinguished from congeneric species by its unique combination of morphological characters: cephalic tubercle adjacent to each eye; pronotum with little expanded bidentate tubercle; parameres symmetric, with acute and divergent apex. The new species was incorporated into a previously published identification key for Bolbapium.
Five families and 100 species of Scarabaeoidea are recorded from Sarnena Sredna Gora Mts. Of these 63 species are new for the study region and for 84 new locality records are presented. The new ...records of the species Geotrupes mutator (Marsham, 1802), Trox sabulosus sabulosus (Linnaeus, 1758), Aesalus scarabaeoides scarabaeoides (Panzer, 1793), Sinodendron cylindricum (Linnaeus, 1758), Platycerus caraboides (Linnaeus, 1758), Ochodaeus thalycroides Reitter, 1892, Aphodius coniugatus (Panzer, 1795), Onthophagus illyricus (Scopoli, 1763), Chaetonyx schatzmayri Mariani, 1946, Hoplia argentea (Poda von Neuhaus, 1761), Anisoplia dispar Erichson, 1847 and Protaetia affinis affinis (Andersch, 1797) are of particular interest. The species Aphodius foetidus (Herbst, 1783) is reported for the second time for Bulgaria. The species Lucanus cervus cervus (Linnaeus, 1758) is included in the Directive 92/43/EEC on the conservation of natural habitats and wild fauna and flora.
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DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
A new Aegidium Westwood species from the East Andes Mountains in Colombia is described and illustrated. A key to the species of Aegidium from Colombia is provided in both English and Spanish. The ...check list of Aegidium especies of the New World is provided.
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BFBNIB, GIS, IJS, KISLJ, NUK, PNG, UL, UM, UPUK
Insect wings are very delicate and flexible. The morphology and function of veins and wing articulation has long aroused wide concern of scientists in many fields. The aim of this study is to ...reconstruct the internal and external three-dimensional morphology of the sclerites of insect wing articulations. The entire morphological information of the very complicated three-dimensional structures will be gained which is impossible to be demonstrated using traditional research methods. The three-dimensional morphology of sclerites of wing articulations including the 1st, 2nd and 3rd axillary plates and median plate was reconstructed and analyzed. Insect wing articulations are complex in internal and external morphology. Double-layer structure and the sponge-like internal structure may be related to the morphological adaptation strategy on minimizing the weight, saving energy in the movement and maintaining a rigid structure at the same time. Such morphological adaptations may have bionics significance for material
Recently, Jan Krikken resigned from his position as associate director of the National Museum of Natural History Naturalis in Leiden. A good reason for an interview. At the age of twelve Jan Krikken ...was given a book about beetles. From that moment on he was hooked on this formi-dable order of insects. His interest in Scarabaeoidea was stimulated by his friend, the entomo-logist Piet Kuyten. In 1963 - Jan still attended grammar school in Groningen - he became a member of the Netherlands Entomological Society (NEV). He studied biology at the Groningen and Leiden Universities. During this study he did a project at the Museum in Leiden. After his study he immediately accepted a job offer there and he never left the museum any more. Ini-tially he was involved in the entomological work with beetles, but soon he was asked to take on several management tasks. Therefore he had hardly time for 'his' Scarabaeoidea. Happily, he can now pick up his beetle business again.
