摘要:

A revision of the Limnius perrisi subspecies group in the Iberian Peninsula is presented. Limnius perrisi subcarinatus (Sharp, 1872) is a new synonym of Limnius perrisi carinatus (Pérez-Arcas, 1865). Morphological variability related to some elytral interstriae corresponds to a geographical gradation. Limnius perrisi is restricted to the headwaters of highslope streams with low levels of dissolved minerals.

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.133.4478

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.140.4475

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The nymph, female subimago and egg of Prosopistoma pearsonorum sp. n. are described from localities in far north Queensland, Australia. This is believed to be the only species of Prosopistoma known from Australia, the previous record of P. sedlaceki Peters being a misidentification.

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.141.4473

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Three new Annitella species (Trichoptera, Limnephilidae, Chaetopterygini) from the Iberian Peninsula, Annitella amelia sp.n. (Portugal), A. cabeza sp.n. (Spain) and A. lalomba sp.n. (Spain) are described. Psilopteryx (Acropsilopteryx) esparraguera Schmid, 1952 and Psilopteryx sanabriensis Gonzales and Otero, 1985 are transferred to the genus Annitella. Brief decriptions and illustrations of these species and of the related species A. pyrenaea (Navás, 1930) are given. A sketch map of the distribution of the Annitella species in the Iberian Peninsula is included.

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.149.4471

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Procladius choreus (Meigen) emerge during the period from April to October in central Japan, in which air temperatures range from 12.0 to 32.0°C. Body size of adults decreased as the temperature exposure at immature stages increased. The smallest male, which was obtained in summer, was reduced to 62.2% of the largest one in wing length, and to 59.6% in females. Male genital structures also varied seasonally; gonocoxite was more slender and gonostylus had a longer posterior heel in spring and fall. Such tendencies in gonocoxite and gonostylus shape were related allometrically to male body size.

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.165.4476

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Differences in interference competition between larvae of the damselfly Lestes viridis (Vander Linden) were examined using caudal lamellae status of exuviae. Exuviae from a small temporary fishless pond near Antwerp (Belgium) where L.viridis was the only odonate present were studied. No lamellae loss during emergence was seen. Therefore, the lamellae status of the exuviae reflects the lamellae status of the final instar larvae. The deviations of the distribution of the number of missing lamellae per individual from a binomial distribution suggested that lamellae are not always lost separately or that some animals are more prone to agonistic encounters. I found no difference in agonistic encounters between sexes. In accordance with the hypothesis of Pierce et al. (1985) interference competition was higher in the lestid species inhabiting small, temporary fishless ponds than in the coenagrionid damselfly Ischnura posita inhabiting large permanent fish containing water bodies that was studied by Robinson et al. (1991).

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.173.4472

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Chironomus tepperi Skuse were reared individually at a range of constant temperatures from 12.5 to 37.5°C (2.5°C intervals), with development and survival monitored at regular intervals. C. tepperi is protandrous, with males developing significantly faster than females at the majority of temperatures examined, due primarily to a shorter final instar. Some individuals completed development at all temperatures, however emergent adults failed to successfully inflate their appendages at 37.5°C. Developmental rate increased with increasing temperature up to 32.5°C, but fell at 35°C. Low adult emergence at 37.5°C precluded a reliable estimate of total development time at that temperature. Survival to adult emergence varied from 10 to 60%, with highest mortality in the pupal stage at all temperatures. Degree-days (DD) and developmental zero (DZ) estimates for egg to adult development are 150.5 DD and 10.5°C for males and 167.1 DD and 10.3°C for females. DD and DZ estimates are presented for each developmental stage. The significance of wide thermal tolerances in a colonist midge species is discussed.

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.181.4470

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Two new species of Caddisflies from the Great Basin region in California and Nevada are described. Lepidostoma castalianum sp. nov., collected at a spring in the White Mts. of Mono Co., California, is closely related to L. verodum Ross. L. ojanum sp. nov., collected at three separate springs in the White Mts. of Inyo Co., California, and one spring in Mineral Co., Nevada, is a member of the unicolor species group, similar to L. frosti (Milne) and L. unicolor (Banks).

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.189.4477

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

ISSN:0165-0424    

DOI:10.1076/aqin.20.3.196.4474

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor