ABSTRACT A phylogenetic analysis of the two-clawed spiders grouped in Dionycha is
presented, with 166 representative species of 49 araneomorph families, scored for 393 …

The male reproductive system and spermatozoa of spiders are known for their high
structural diversity. Spider spermatozoa are flagellate and males transfer them to females in …

The field of systematics involves at least three major elements: biodiversity exploration
(inventory); taxonomic discovery and description (taxonomy); and the estimation of …

The study of many museum specimens of goblin spiders from the Himalayan range and
neighboring countries allows for the description of new taxa of the family Oonopidae. The …

The type species of Costarina, C. plena (OP-Cambridge), is redescribed, has an unusually
broad distribution (extending from southern Mexico to northern Costa Rica), and is …

Spiders show a wide range of sensory capabilities as evidenced by behavioural
observations. Accordingly, spiders possess diverse sensory structures like mechano-, hygro …

Complexity is an important aspect of evolutionary biology, but there are many reasonable
concepts of complexity, and its objective measurement is an elusive matter. Here we …

The genus Orchestina Simon is distributed worldwide and is characterized by having an
enlarged fourth femur with which these species are capable of jumping. The genus is also …

Although originally described from St. Vincent in the Lesser Antilles, the goblin spider genus
Ischnothyreus Simon appears to be an Old World taxon that is represented in the New World …

Orchestina sakhalinensis Marusik, Perkovsky et Eskov, sp. n.(Oonopidae: Orchestininae) is
described from Eocene of Sakhalin. Other poorly preserved specimens of spiders from …