EJE, vol. 104 (2007), issue 3

A study of meiosis and spermiogenesis in the testicular lobes of Antiteuchus tripterus (Heteroptera: Pentatomidae)

Hederson Vinícius de SOUZA, Hermione Elly Melara De CAMPOS BICUDO, Luiz Antônio Alves COSTA, Mary Massumi ITOYAMA

Eur. J. Entomol. 104 (3): 353-362, 2007 | DOI: 10.14411/eje.2007.053

An analysis of testicular morphology and spermatogenesis in the Heteroptera species Antiteuchus tripterus (Pentatomidae) revealed that these traits differ from that recorded for other species of the same family. The testes of A. tripterus have only six lobes, while other species of the same family typically have seven lobes, including a compound lobe, i.e., a lobe containing another in its lumen. A study of meiosis and sperm structure in the different lobes of A. tripterus revealed a conventional meiosis in the lobes numbered one to three. In lobe four, however, prophase I spermatocytes exhibit the morphological characteristics...

Molecular differentiation of the four most commonly occurring Trichogramma (Hymenoptera: Trichogrammatidae) species in China

Zheng-Xi LI

Eur. J. Entomol. 104 (3): 363-367, 2007 | DOI: 10.14411/eje.2007.054

Trichogramma dendrolimi
, T. ostriniae, T. confusum and T. evanescens are the four most commonly occurring Trichogramma species with overlapping distribution in China. They are the most frequently used egg parasitoids for biological control of lepidopterous crop pests in China. It is difficult to differentiate Trichogramma species because of their small size and lack of differences in morphological characters. Different molecular markers were employed to molecularly characterize and differentiate these species, including direct amplification of the internally transcribed spacer 2 (ITS2) of ribosomal DNA...

bmpkci is highly expressed in a resistant strain of silkworm (Lepidoptera: Bombycidae): Implication of its role in resistance to BmDNV-Z

Ke-Ping CHEN, Hui-Qing CHEN, Xu-Dong TANG, Qin YAO, Lin-Ling WANG, Xu HAN

Eur. J. Entomol. 104 (3): 369-376, 2007 | DOI: 10.14411/eje.2007.055

Using the fluorescent differential display technique, a special band named Bm541 was identified by screening for differentially expressed genes in the resistant silkworm strain Qiufeng, the susceptible strain Huaba35, and the near isogenic line BC6, which carries the resistant gene to Bombyx mori densonucleosis virus (BmDNV). After applying the 5'RACE technique with specially designed primers, a 1148 bp cDNA clone containing a 387 bp open reading frame (ORF) was obtained. This gene was registered in GenBank under the accession number AY860950. The deduced amino acid sequence showed a 73.1% identity to the protein kinase C inhibitor...

Dispersal and reproductive responses of the water strider, Aquarius paludum (Hemiptera: Gerridae), to changing NaCl concentrations


Eur. J. Entomol. 104 (3): 377-383, 2007 | DOI: 10.14411/eje.2007.056

The responses of females of the water strider, Aquarius paludum, to changes in NaCl concentration were examined in the laboratory. The insects were sampled seasonally in 2002 and 2003 at two reservoirs in Kochi, Japan, connected by a waterway, one at the mouth of the river with high NaCl concentrations (the range in NaCl concentration during a year: 0.1-1.08%) and one 700 m upstream, where the salinity was lower (0.03-0.23%). Sudden increase in NaCl concentration, from 0.45 to 0.9%, after adult strider emergence suppressed reproduction and promoted flight activity, whereas a decrease in salinity did not affect either trait. In the field, A....

Cold tolerance and trehalose accumulation in overwintering larvae of the codling moth, Cydia pomonella (Lepidoptera: Tortricidae)


Eur. J. Entomol. 104 (3): 385-392, 2007 | DOI: 10.14411/eje.2007.057

Seasonal variations in the supercooling point, survival at low temperatures and sugar content were studied in field-collected codling moth larvae. The supercooling point of field-collected larvae decreased significantly from a mean value of -13.4°C in August 2004 (feeding larvae) to -22.0°C in December 2004 (overwintering larvae). Survival at -20°C/24 h was 0% during early autumn, whereas it increased to approximately 60% during winter. The survival at low temperature was well correlated with the supercooling point. The supercooling point of the diapause destined larvae decreased from -16.9 to -19.7°C between September and October as the larvae left...

Temporal effects of multiple mating on components of fitness in the two-spot ladybird, Adalia bipunctata (Coleoptera: Coccinellidae)

Penelope R. HADDRILL, David M. SHUKER, Sean MAYES, Michael E.N. MAJERUS

Eur. J. Entomol. 104 (3): 393-398, 2007 | DOI: 10.14411/eje.2007.058

Insects have provided much of the best evidence to date concerning possible costs and benefits of multiple mating, and here we investigate the benefits of polyandry in the two-spot ladybird, Adalia bipunctata, by attempting to replicate the highly promiscuous mating system in this species. We compared the temporal pattern of reproductive success of females mated multiple times to one male with that of females mated an equal number of times to multiple males, and found transient differences in offspring production and hatch rate over time. Our data suggest that polyandrous females benefit from multiple mating in some circumstances, but the patterns...

Repellency of conspecific and heterospecific larval residues to Hippodamia convergens (Coleoptera: Coccinellidae) ovipositing on sorghum plants


Eur. J. Entomol. 104 (3): 399-405, 2007 | DOI: 10.14411/eje.2007.059

We examined oviposition decisions by Hippodamia convergens Guérin in semi-natural arenas in the laboratory. Gravid females were presented individually with an array of four young sorghum plants, Sorghum bicolor, bearing (1) no additional stimulus, (2) an established colony of greenbug, Schizaphis graminum Rondani, (3) residues of conspecific larvae, and (4) greenbugs plus residues of conspecific larvae. Females laid no egg masses on type 3 plants, significantly fewer than expected by chance on type 4 plants, and significantly more on type 1 plants, with type 2 plants receiving expected numbers. Females laid 50% of egg masses on...

Life table parameters of the pseudococcid predators Nephus includens and Nephus bisignatus (Coleoptera: Coccinelidae)

Dimitris C. KONTODIMAS, Panagiotis G. MILONAS, George J. STATHAS, Leonidas P. ECONOMOU, Nickolas G. KAVALLIERATOS

Eur. J. Entomol. 104 (3): 407-415, 2007 | DOI: 10.14411/eje.2007.060

The fecundity of the pseudococcid predators Nephus includens (Boheman) and N. bisignatus (Kirsch) (Coleoptera: Coccinellidae), fed on Planococcus citri Risso (Hemiptera: Pseudococcidae), was studied at several constant temperatures (15, 20, 25, 30, 32.5 and 35°C). With additional data for the development of the immature stages, life-fecundity tables were constructed and some population parameters calculated. The average total fecundities of N. includens at the above temperatures were 49.2, 97.8, 162.8, 108.5, 87.4 and 31.1 eggs/female, and average longevities 99.5, 84.7, 69.5, 61.1, 49.6 and 30.1 days, respectively. The...

Influence of different diets and oviposition substrates on Lygus rugulipennis biology (Heteroptera: Miridae)

Gianandrea SALERNO, Francesca FRATI, Eric CONTI, Ferdinando BIN

Eur. J. Entomol. 104 (3): 417-423, 2007 | DOI: 10.14411/eje.2007.061

The aim of this study was to evaluate the effects of different diets on the development and reproduction of Lygus rugulipennis Poppius (Heteroptera: Miridae). Using 2 laboratory generations (F1 and F2) obtained from field-collected L. rugulipennis, the following diets were tested: beans, beans plus Tenebrio molitor (L.) (Coleoptera: Tenebrionidae) pupae, and a commercial artificial diet, which was developed for mass rearing of Lygus hesperus Knight. As oviposition substrates, beans and agar/parafilm rolls were used. Our data show that both the artificial diet and the artificial oviposition substrate were ineffective substitutes...

Daily activity and flight behaviour of adults of Capnodis tenebrionis (Coleoptera: Buprestidae)

Carmelo Peter BONSIGNORE, Charlie BELLAMY

Eur. J. Entomol. 104 (3): 425-431, 2007 | DOI: 10.14411/eje.2007.062

Ecological studies on the buprestid beetle Capnodis tenebrionis (Linnaeus, 1767) were carried out in the laboratory and the field. In particular, attention focussed on the effects of seven different temperatures at different times during the day on the movement and feeding activity of this beetle. Field experiments in an apricot orchard recorded the flight activity of C. tenebrionis, with particular reference to the effect of temperature and wind. The experiments highlighted the marked response of movement, feeding and flight activity to increase in temperature. The optimal temperature for feeding, movement and flight was 30°C and above...

Differences in the development of the closely related myrmecophilous butterflies Maculinea alcon and M. rebeli (Lepidoptera: Lycaenidae)


Eur. J. Entomol. 104 (3): 433-444, 2007 | DOI: 10.14411/eje.2007.063

The initially phytophagous caterpillars of Maculinea alcon and M. rebeli complete their development in Myrmica ant colonies as social parasites. Recent genetic studies show no differences at the species level among various populations of each butterfly taxa. Usually M. alcon and M. rebeli are identified by habitat and larval food plants (Gentianaceae) and host ant specificity is also considered to be an important feature. However most of the ecological characteristics overlap at least in some parts of their distributions. The developmental and survival characteristics of caterpillars reared by different Myrmica...

The association between wing morphology and dispersal is sex-specific in the glanville fritillary butterfly Melitaea cinxia (Lepidoptera: Nymphalidae)


Eur. J. Entomol. 104 (3): 445-452, 2007 | DOI: 10.14411/eje.2007.064

We examined whether dispersal was associated with body and wing morphology and individual quality, and whether such an association was sex-specific, in the Glanville fritillary butterfly Melitaea cinxia (L.) in Paldiski on the north coast of Estonia. Body weight, size and shape of both fore- and hindwing, wing aspect ratio and wing loading were used as measures of body and wing morphology. Fluctuating asymmetry (FA) of wing shape was used as a measure of individual quality. Males and females did not differ in dispersal rates, despite large differences in overall morphology and FA. Females had a significantly higher wing loading and aspect ratio,...

The development of sexual differences in body size in Odonata in relation to mating systems


Eur. J. Entomol. 104 (3): 453-458, 2007 | DOI: 10.14411/eje.2007.065

Adult body size is the result of important environmental, maternal and/or genetic effects acting on animals during development. Here we investigate how sexual size dimorphism (SSD) develops in seven species of Odonata: Anax imperator, Cordulegaster boltonii, Onychogomphus uncatus, Oxygastra curtisii (Anisoptera), Cercion lindeni, Ischnura graellsii and Platycnemis acutipennis (Zygoptera). SSD of both the last larval and adult stages of the same individuals, which were reared under laboratory conditions, was measured. The aims were to investigate (i) whether SSD develops during the larval stage, (ii)...

Sexual dimorphism and light/dark adaptation in the compound eyes of male and female Acentria ephemerella (Lepidoptera: Pyraloidea: Crambidae)

Ting Fan (Stanley) LAU, Elisabeth Maria GROSS, Victor Benno MEYER-ROCHOW

Eur. J. Entomol. 104 (3): 459-470, 2007 | DOI: 10.14411/eje.2007.066

In the highly sexual-dimorphic nocturnal moth, Acentria ephemerella Denis & Schiffermüller 1775, the aquatic and wingless female possesses a refracting superposition eye, whose gross structural organization agrees with that of the fully-winged male. The possession of an extensive corneal nipple array, a wide clear-zone in combination with a voluminous rhabdom and a reflecting tracheal sheath are proof that the eyes of both sexes are adapted to function in a dimly lit environment. However, the ommatidium of the male eye has statistically significantly longer dioptric structures (i.e., crystalline cones) and light-perceiving elements (i.e., rhabdoms),...

Myzocallis walshii (Hemiptera: Sternorrhyncha: Aphididae), an exotic invasive aphid on Quercus rubra, the American red oak: Its bionomy in the Czech Republic


Eur. J. Entomol. 104 (3): 471-477, 2007 | DOI: 10.14411/eje.2007.067

(Lineomyzocallis) walshii (Monell), a North American aphid species associated with Quercus rubra was detected for the first time in Europe in 1988 (France), and subsequently in several other countries - Switzerland, Spain, Andorra, Italy, Belgium and Germany. Recent research in 2003-2005 recorded this aphid occurring throughout the Czech Republic. The only host plant was Quercus rubra. The highest aphid populations occurred in old parks and road line groves in urban areas, whereas the populations in forests were low. The seasonal occurrence of the light spring form and the darker summer form of M....

The microspatial distribution of beetles (Coleoptera) on exposed riverine sediments (ERS)

Adam J. BATES, Jon P. SADLER, Joe N. PERRY, Adrian P. FOWLES

Eur. J. Entomol. 104 (3): 479-487, 2007 | DOI: 10.14411/eje.2007.068

Exposed Riverine Sediments (ERS) are often characterised by a high diversity of microhabitats due to strong lateral gradients in temperature, humidity, inundation frequency and availability of aquatic food resources and to variations in the degree of vegetation cover, sediment size and sorting. This variation, potentially in combination with interspecific competitive interactions, is thought to drive the microspatial distribution of ERS invertebrates. This research investigated the microspatial distribution of six ERS specialist beetles across three discreet patches of ERS. In particular it examined the temporal stability of species distributions,...

Variation in dung beetle (Coleoptera: Scarabaeoidea) assemblages with altitude in the Bulgarian Rhodopes Mountains: A comparison


Eur. J. Entomol. 104 (3): 489-495, 2007 | DOI: 10.14411/eje.2007.069

Variation with altitude in the composition of dung beetle assemblages and species richness was measured by sampling in spring, summer and autumn, both manually and with pitfall traps at twelve localities in the western Rhodopes Mountains. Non-parametric estimates indicate that most of the regional species pool was collected, some 73% of all taxa previously recorded in the entire region. The rate of species richness decrease with altitude is around 11 species per km, with an evident altitudinal change in the incidence of two main dung beetle functional groups in which Aphodiinae species begin to dominate Rhodopes assemblages at around 1400-1500 m. Species...

Faunal patterns in Tuscan archipelago butterflies (Lepidoptera): The dominant influence is recent geography not paleogeography

Leonardo DAPPORTO, Alessandro CINI

Eur. J. Entomol. 104 (3): 497-503, 2007 | DOI: 10.14411/eje.2007.070

The aim of this paper is to examine whether current and/or Pleistocene geography affect the species richness and composition of Tuscan archipelago butterflies. This archipelago is located between Tuscany (Italy) and Corsica (France). Faunistic data was obtained from the literature and surveys. Our data revealed that contemporary geography is the most important factor determining the species richness and faunal composition of Tuscan archipelago butterflies. Indeed, current area and isolation of the islands are the only predictors significantly correlated with species richness. Paleogeographic features of the archipelago are not significantly correlated...

Redescription of a weevil Paramecops sinaitus (Coleoptera: Curculionidae: Molytinae) from the Sinai and an ecological study of its interaction with the Sinai milkweed Asclepias sinaica (Gentianales: Asclepiadaceae)


Eur. J. Entomol. 104 (3): 505-515, 2007 | DOI: 10.14411/eje.2007.071

We collected specimens of Paramecops sinaitus (Pic, 1930) (Curculionidae: Molytinae) from south Sinai in Egypt, which enabled us to make the first complete description of this species. We also include some taxonomic remarks on the genus. Paramecops solenostemmatis (Peyerimhoff, 1930) is a synonym of Paramecops sinaitus. We propose the new combination Paramecops sogdianus (Nasreddinov, 1978), based on Perihylobius sogdianus Nasreddinov, 1978, which would make Perihylobius and Paramecops synonymous. Like other Paramecops species, P. sinaitus appears to share a close interaction with...

Cladistic analysis of Sericania (Coleoptera: Scarabaeidae: Sericini) - implications for the evolution of the xerophilous fauna of the Himalaya


Eur. J. Entomol. 104 (3): 517-530, 2007 | DOI: 10.14411/eje.2007.072

A cladistic analysis of the species of Sericania Motschulsky, 1860, was executed using fifty-six morphological characters of adults. The monophyly of the genus is supported by the phylogenetic trees generated. Among the three major lineages indicated by the strict consensus tree the East Asian Sericania fuscolineata lineage represents the genus Sericania as defined "originally" and adopted by subsequent authors. The second, the clade Sericania nepalensis group + Sericania sp. 2, is a sister group to the S. fuscolineata clade. Both constitute a sister group to the third major lineage, the Sericania kashmirensis...

Revision of Iberian species of the genus Merodon (Diptera: Syrphidae)


Eur. J. Entomol. 104 (3): 531-572, 2007 | DOI: 10.14411/eje.2007.073

This study is a revision of the Iberian Merodon Meigen, 1803 species, including an illustrated key, a discussion of taxonomic characters and a morphological diagnosis for all included species. Descriptions are provided for nine new species: M. antonioi sp. n., M. arundanus sp. n., M. cabanerensis sp. n., M. crypticus sp. n., M. hurkmansi sp. n., M. legionensis sp. n., M. longispinus sp. n., M. luteihumerus sp. n. and M. quercetorum sp. n. The taxon M. escorialensis Strobl, 1909 is redescribed and lectotype is designated. Lectotypes are designated for four taxa: M....

Lepidosina, a new genus of New World Limosininae (Diptera: Sphaeroceridae)

Stephen A. MARSHALL, Matthias BUCK, Owen LONSDALE

Eur. J. Entomol. 104 (3): 573-599, 2007 | DOI: 10.14411/eje.2007.074

The New World genus Lepidosina Marshall & Buck gen. n. is described including nine new and two previously described species: L. angusticercus Marshall & Buck sp. n. (Caribbean, Central and South America), L. argentinensis Marshall & Buck sp. n. (Argentina), L. cubensis Marshall & Buck sp. n. (Cuba), L. evanescens Marshall & Buck sp. n. (Central and South America), L. gibba (Spuler) comb. n. (Florida, Caribbean), L. inaequalis (Malloch) comb. n. (southern U.S.A., Central America, Venezuela), L. multispinulosa Marshall & Buck sp. n. (Ecuador, Peru), L. platessa Marshall...

Phylogeny of European Dolichopus and Gymnopternus (Diptera: Dolichopodidae) and the significance of morphological characters inferred from molecular data


Eur. J. Entomol. 104 (3): 601-617, 2007 | DOI: 10.14411/eje.2007.075

Dolichopodidae (over 6000 described species in more than 200 genera) is one of the most speciose families of Diptera. Males of many dolichopodid species, including Dolichopus, feature conspicuous ornaments (Male Secondary Sexual Characters) that are used during courtship. Next to these MSSCs, every identification key to Dolichopus primarily uses colour characters (postocular bristles; femora) of unknown phylogenetic relevance. The phylogeny of Dolichopodidae has rarely been investigated, especially at the species level, and molecular data were hardly ever involved. We inferred phylogenetic relationships among 45 species (57 samples) of...

BOOK REVIEW: Oosterbroek P.: The European Families of the Diptera. Identification, diagnosis, biology.


Eur. J. Entomol. 104 (3): 618, 2007 | DOI: 10.14411/eje.2007.076

KNNV Publishing, Utrecht, 2006, 205 pp., (www.knnvpublishing.nl), ISBN 90-5011-245-5 / 978-90-5011-245-1. Price EUR 59.95.

"Nymphes plissées" structure of the cuticle of juveniles of some oribatid mites (Acari: Oribatida)

Jaroslav SMR®

Eur. J. Entomol. 104 (3): 619-629, 2007 | DOI: 10.14411/eje.2007.077

The cuticular structure of juveniles of several oribatids of different families with wrinkled cuticles were compared: Hermannia gibba, Tectocepheus velatus, Scutovertex minutus, Achipteria coleoptrata and Eupelops occultus. Both the surface and internal structures of the "plissée" were studied. Light microscopy revealed several patterns in mites studied with Masson's triple stain and these results were supported by TEM. Although the "plissée" looks similar at the body surface, the structure and ultrastructure differ among groups. Some types of wrinkling is supported by small muscles, probably for changing...

Effect of temperature on some biological parameters of an Iranian population of the Rose Aphid, Macrosiphum rosae (Hemiptera: Aphididae)


Eur. J. Entomol. 104 (3): 631-634, 2007 | DOI: 10.14411/eje.2007.078

The rose aphid, Macrosiphum rosae, living on rose var. Black Magic, was reared in the laboratory at four constant temperatures 15, 18, 22 and 25 ± 1°C, 75 ± 5% R.H. and 14L : 10D. Parameters investigated included developmental rate, survival, pre-reproductive delay and fecundity. The rate of nymphal development (0.17) was greatest at 22°C. The longest developmental time (12.33 days) was recorded at 15°C. The generation time was longest and shortest at 15°C and 22°C respectively. The lower developmental threshold was calculated to be 9.05°C. Based on this, the degree-day requirement from birth to adulthood was found to be 77.5 dd....

Transition from bamboo sap to water: Aquatic habits in the sap beetle Amphicrossus japonicus (Coleoptera: Cucujoidea: Nitidulidae)


Eur. J. Entomol. 104 (3): 635-638, 2007 | DOI: 10.14411/eje.2007.079

Amphicrossus japonicus
is the first known facultatively aquatic nitidulid. The adult beetles breed in bamboo sap and subsequently enter water-filled bamboo culms. In water they breathe via a ventral air sheath held by hydrofuge pubescence. The beetles are facultative predators and hunt mosquito larvae, which they grab with their forelegs. The trend to facultative predation in Cucujoidea and the transition for beetles in general from semi-liquid decaying organic matter into water is discussed.