A survey of 117 species of arthropods and 17 species of vertebrates showed a strong trend for male genitalia to have relatively low static allometric values. This trend contrasts with the allometry of other structures under sexual selection, which usually show steep allometric slopes. The trend to low allometric genital values is less consistent in mammals than in arthropods. Data not in accord...

Vertebrates and arthropods share the common problem of controlling a rigid, articulated skeleton using neurally-controlled, striated muscle. Since this condition has arisen independently in the two groups, there is no reason to assume, a priori, that the control mechanisms used by the two groups will be the same. Indeed, there appear to be fundamental differences in the tactics used by the two ...

Bacterial panicle blight (BPB) caused by Burkholderia glumae has become the most important disease of ‘Bengal’ rice in Arkansas. Many arthropods with the capability to vector bacteria are commonly found in rice fields; however, no link has been made to any arthropod vectors of BPB. This study sampled rice fields for the presence of BPB and any small arthropods typically implicated in disease ve...

There is a significantly greater post-Cambrian decline in frequency of ordinal origination among serially constructed Bilateria, such as arthropods, than in nonserially constructed Bilateria. Greater decline in arthropod ordinal origination is not predicted by ecologic, diversity-dependent models of decline in the production of higher taxa. Reduction in ordinal origination indicates increased c...

After a short review of impotence, the definitions of erectants and aphrodisiacs are presented. The Authors propose division of arthropods according to the places of effect. The description of particular arthropods with their pictures and nomenclature, is followed by certain or probable mechanisms of achieving the aphrodisiac and sometimes toxic effect, that were available in the literature sin...

Terrestrial and aquatic arthropods sense fluid flow in many behavioral and ecological contexts, using dedicated, highly sensitive mechanosensory hairs, which are often abundant. Strong similarities exist in the biomechanics of flow sensors and in the sensory ecology of insects, arachnids, and crustaceans in their respective fluid environments. We extend these considerations to flow in sand and ...