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Twenty-two species are recognized in the genus DendrocellusSchmidt-Göbel 1846. Seven of them are described as new to science: D. bicoloripennis, new species (type locality: 18 km SSE of Chisenga, Jembya Reserve, Malawi); D. inexpectus, new species (type locality: Barway, India); D. javanus, new species (type locality: Java, Indonesia); D. micropectinatus, new species (type locality: Abercorn, Zambia); D. nigripennis, new species (type locality: N. Kalimantan, Malaysia); D. queenslandicus, new species (type locality: Queensland, Australia), and D. sinicus, new species (type locality: Jiangxi, China). Four species or subspecies are considered as junior synonyms: Desera gilsoni gilsoniDupuis, 1912, = Dendrocellus geniculatus (Klug 1834), new synonymy; Desera gilsoni continentalisHansen 1967, = Dendrocellus geniculatus (Klug 1834), new synonymy; Dendrocellus parallelusChaudoir 1872, = Dendrocellus coelestinus (Klug 1834), new synonymy; and Desera kulti reconditaHanson 1967, = Dendrocellus kulti (Jedlicka 1960) new synonymy. Drypta dimidiataPutzeys 1880, which was wrongly treated as a member of Dendrocellus, is returned to genus Drypta. Dendrocellus rugicollis Chaudoir is recognized as a distinct species, not a synonym of D. geniculatus (Klug). Lectotypes are designated for five species-group names: Dendrocellus gestroi Bates, Dendrocellus parallelus Chaudoir, Dendrocellus rugicollis Chaudoir, Dendrocellus ternatensis Chaudoir, and Desera schultzei Heller. A key to all known Dendrocellus species is provided.
Aquatic beetles in the families Dryopidae, Dytiscidae, Elmidae, Gyrinidae, Haliplidae, Hydrophilidae, Noteridae, Psephenidae, and Scirtidae were sampled at the Ravenna Training and Logistics (RTLS) site in northeast Ohio from 1999 through 2001. The site is a military base with restricted access, but military activities can cause considerable environmental disturbance. The RTLS has many headwater streams that are part of the Mahoning River basin. It is therefore an important resource in maintaining stream quality in this watershed. This survey is the first comprehensive effort at surveying the aquatic beetles at the RTLS. 124 species were collected including three haliplids, three dytiscids, one gyrinid, and three hydrophilids that were new state records for Ohio. We used these capture data to obtain preliminary estimates of biodiversity in different portions of the RTLS, and estimate how many species we missed in our sampling program. We estimated that about 90% of the total species present at the RTLS were recovered in this survey.
In their natural habitat in central Mexico, adult Diabrotica porracea Harold (Chrysomelidae: Galerucinae) feed exclusively within the trenches cut by Epilachna tredecimnotata (Latreille) (Coccinellidae) on green, turgent leaves of their common host Cucurbita okeechobeensis ssp. martinezii L. Bailey. In laboratory experiments, we observed that adult E. tredecimnotata cut their characteristic trenches into turgent leaves of this plant. Furthermore, D. porracea beetles only fed inside trenched circles or on leaves without turgor pressure. No sap flow was detected in wilted leaves or leaves without turgor pressure. The phloem sap emanating from cut leaf veins is sticky and chrystalizes quickly. Due to its hardening on the insectś mouthparts it impedes further feeding. Our results support the hypothesis that herbivorous insects on Cucurbitaceae avoid feeding on turgent leaves due to the sticky phloem sap. The opportunistic feeding behavior of D. porracea is discussed in the context of the coexistance of both beetle species on the same plant.
The generic name Nosoderma was first validated by Guérin-Méneville 1838 (type species Nosoderma echinatum Guérin-Méneville by monotypy) not Solier 1841. This correction results in significant changes to the nomenclature of the Zopherini. MeraliusCasey 1907 is synonymized with NosodermaGuérin-Méneville 1838, new synonymy. VerodesCasey 1907, new status, new sense, [type species Verodes aequalis (Champion) by original designation] is proposed as the replacement name for Nosoderma Solier not Guérin-Méneville. These changes result in the 24 following new combinations: Nosoderma turquinense (Garrido) and Nosoderma montanum (Garrido), and Verodes inaequalis (Say), V. championi (Casey), V. insignis (Champion), V. interruptus (Champion), V. scabrosus (Solier), V. asperatus (Champion), V. prominens (Casey), V. senex (Casey), V. exsculptus (Champion), V. carinatus (Champion), V. subglabrus (Casey), V. anceps (Champion), V. impressus (Champion), V. longipennis (Casey), V. brevicollis (Casey), V. denticulatus (Solier), V. lutosus (Champion), V. venustus (Champion), V. zunilensis (Champion), V. guatemalensis (Champion), V. squalidus (Casey), and V. sparsus (Champion).
Arboreal foraging by dung beetles has been reported from tropical rainforests in several regions. In the central Amazon, Brazil, the widespread, arboreal dung beetle Canthon subhyalinus Harold was caught most often in dung traps at 8–24 m above the forest floor, below the height of most primate activity in the area, where dung should be plentiful yet competition for it low. Studies of dung beetle diversity routinely only include traps set on the forest floor, missing arboreal species such as C. subhyalinus, and generating misleading descriptions of dung beetle diversity and abundance. Future studies of dung beetle diversity should include arboreal traps to accurately sample the diversity and abundance of species that rarely forage at ground level.
The terrestrial firefly Pyrocoelia pectoralis (E. Oliv., 1883) (Coleoptera: Lampyridae) was discovered in mainland China in 2002. The larvae of P. pectoralis inhabit moist grasslands and deserted farmlands rich in terrestrial vegetation. We recorded P. pectoralis mainly feeding on two species of land snails, Bradybaena similaris (Férussac) and Bradybaena ravida ravida (Benson) (Stylommatophora: Bradybaeniidae). A predator of adult fireflies was also recorded for the first time: the spider, Tetragnatha praedonia (L. Koch) (Araneae: Tetragnathidae). The prepupal stage of P. pectoralis lasted 5.3 (female) and 6.2 (male) days. The pupal stage lasted 8.4 (female) and 13.4 (male) days at 25°C. The imaginal period lasted from September to October. The photic emission of P. pectoralis was 526.5 ~ 593.9 nm, with the peak emitted wavelength (λmax) at 548.6 nm. A female can mate with a male immediately after emergence and with several different males. The total number of eggs laid by mated females was correlated with the female's initial mass (y = 235.28x−20.38, R2 = 0.7283, n = 44, P < 0.01). The average number of eggs laid was 72.0. In addition, unmated females can also lay eggs. Reflex bleeding was observed in the adults of these fireflies.
Diversity of Galician water beetles (Coleoptera: Gyrinidae, Haliplidae, Noteridae, Hygrobiidae, Dytiscidae and Hydrophiliade) was analyzed using a database created by collecting species records from several data sources. Most data came from a long-term sampling program carried out by one of the authors across the whole region but further local studies provided additional data. To assess the inventory completeness as well as to estimate the species richness, both an asymptotic model and some non-parametric estimators were used. Database records were utilized as a sampling-effort surrogate. Total richness estimations predicted by these different methods range between 117 and 131 species. Therefore, it seems that between 86 and 97% of the beetle fauna belonging to the studied families was recorded, so that the inventory has reached an acceptable level of completeness (113 species). A list of the Galician species of Gyrinidae, Haliplidae, Noteridae, Hygrobiidae, Dytiscidae and Hydrophilidae is given.
Sexual size and shape dimorphism was quantified in the whirligig beetle Dineutus nigrior Roberts. Females were larger in terms of body length, elytra length, body height, profemur width, and mass. Males had longer heads, longer and wider protarsi, longer and wider protibiae, and longer profemora. Discriminant function analysis identified 80.5% of individuals as the correct sex based on measurements of body size. Males and females also differed in terms of body shape. Potential causes of the dimorphism are discussed.
Enaptorhinus shansiensis Han & Zhang, new species is described from China with a discussion of key characters and relationships between the new species and other members of the genus. Keys to the species of both male and female adult Enaptorhinus Waterhouse are presented. Illustrations of diagnostic features of the new species are provided. All type specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences in Beijing, China.
Seven species of ground beetles, introduced into North America from Europe, were selected for a distribution study in the province of Québec, Canada. Their distribution was determined with the specimens in three Canadian insect collections: the Lyman Entomological Museum (LEM), the Ouellet-Robert Collection at the Université de Montreal (QMOR) and the Canadian National Collection in Ottawa (CNC). Current distributions were compared to that reported by Larochelle (1975). Harpalus affinis (Schrank), Agonum muelleri (Herbst), Clivina fossor L., Pterostichus melanarius (Illiger) and Carabus nemoralis Müller have a similar distribution to what is reported by Larochelle (1975). Harpalus rufipes DeGeer has possibly expanded its range south from Gaspesie Region (eastern Quebec) or north from eastern United States towards Montreal. Bembidion obtusum Audinet-Serville has probably expanded its range from Ontario into southern Québec.