摘要:

A new hemipteran subfamily,Parastrachiinae, is proposed in the Cydnidae for the single genusParastrachiaDistant 1883. There are two included species,P. japonensis(Scott 1880) andP. nagaensisDistant 1908. The morphology, relationships, and taxonomic history ofParastrachiaare discussed

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1988.tb01365.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SierraiaConnolly (Prosobranchia: Bithyniidae) was previously known as a monotypic genus endemic to rivers in Sierra Leone, West Africa. Based on over 16000 recently collected snails belonging to this genus an expanded description of the type species,S. leonensisConnolly, is given and three new species are described, with accounts of habitat, mode of life, ontogeny and comparative morphology of the shell and operculum.Sierraiais compared with other bithyniid genera.SoapitiaBinder, previously placed in the Hydrobiidae, is transferred to the Bithyniidae. After considering possible morphological convergence through adaptation for clinging to stones, it is concluded thatSierraiais related most closely toSoapitia(in which reduction of the operculum has proceeded to the point of redundancy). Their central teeth are small in comparison with those of other African and non‐African taxa. Attention is drawn to the potential value of variation in the size of the exhalent siphon as a source of taxonomic characters in the Bithyniida

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1988.tb01366.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

By studying a hilltopping population of the satyrineLasiommata megerain southern Sweden, the effects of density and meteorological conditions on mate‐searching behaviour were investigated.Lasiommata megeramales switched between stationary and vagrant behaviour, and the behaviour adopted was correlated to meteorological conditions; more males were stationary at low temperatures, low irradiation levels and high wind speeds than vice versa. Body temperature measurements indicated that these factors were important in deciding the body temperature and thereby the flight activity of males. Male density did not significantly influence mate‐locating behaviour. The tendency of males to hilltop and their distribution around the hill were strongly influenced by weather. The hilltopping behaviour of this species did not adhere to an all‐or‐none pattern, but instead males, as well as the stations they used, were found at increasingly higher elevations on the hill with increasing temperatures and decreasing wind speeds. Moreover, males tended to use the lee side and sun‐exposed side of the hill. Females, of which the majority were already mated, also showed this distribution around the hill, but preferred lower elevations than males. Release experiments did not reveal any propensity of mated females to fly uphill. Such a propensity was shown by released virgi

ISSN:0024-4082    

DOI:10.1111/j.1096-3642.1988.tb01367.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY