Linyphiid spiders

199 p. : ill. ; 26 cm.Include bibliographical references (p. 194-195) and index."Descriptions are given of numerous new linyphiid genera and species from South America; these are listed alphabetically in the index. Of the known South American linyphiid genera, Dubiaranea (formerly Hormembolus) now has the greatest number of species, and considerable increases have also been made to the genera Laminacauda, Neomaso, Meioneta, and Sphecozone. In addition to a variety of small erigonine-like species, characterized by a simple tracheal system, a number of true erigonine species (with the complex tracheal system) are now found in South America. These erigonines fall into two groups which appear to be related to the Erigone and Ceratinopsis groups of genera. Most are endemic to South America, and none of the common, widespread linyphiid genera of the Northern Hemisphere seem to be present, except probably as recent arrivals. No representatives of the subfamily Mynogleninae have been discovered, and it is concluded that this subfamily is not present in South America. There is no obvious congruence between the linyphiid fauna of South America and that of New Zealand"--P. 5

Genus Eperigone Crosby and Bishop (Araneae, Linyphiidae)

75 p. : ill., maps ; 26 cm.Includes bibliographical references (p. 73-75)."A revision of the genus Eperigone is reported. E. albula Zorsch and Crosby is removed from the genus, and the following synonyms are proposed: Eperigone antillana Bryant = E. serrate Ivie and Barrows; E. banksi Ivie and Barrows = E. fradeorum (Berland); E. credula Gertsch and Davis = E. bryantae Ivie and Barrows; E. lyra Chamberlin and Ivie = E. bryantae; E. simplex (Emerton) (junior homonym) = E. bryantae; E. simplicia Roewer = E. bryantae. The known species from North and Central America and the Caribbean area are 68 in number, including the following 41 new taxa: E. avia, E. caelebs, E. cognata, E. colima, E. comes, E. conexa, E. dominica, E. estrellae, E. faceta, E. florida, E. formosa, E. fracta, E. fusca, E. hospita, E. ignobilis, E. imago, E. leonina, E. libana, E. madera, E. major, E. media, E. mediocris, E. mera, E. modica, E. montana, E. monticola, E. morata, E. orba, E. ornata, E. paludosa, E. paula, E. perplexa, E. persimilis, E. pinicola, E. proba, E. singularis, E. sodalis, E. sola, E. solita, E. subantillana, and E. tibialis. The genitalic structures indicate that Eperigone and Erigone are closely related, and that Annapolis probably falls in the same group. Eperigone appears to be endemic to the North American continent, but there has been limited dispersal to other regions. Descriptions, diagnoses, and distributions are given for each species"--P.[1]

Linyphiid spiders

78 p. : ill. ; 26 cm.Includes bibliographical references (p. 77-78)."The results are given of a study of some linyphiid spiders from South America; most of the material examined originated from Chile, but small collections from other regions, including Tristan da Cunha, are also included. The majority of the species examined are haplotracheate ('linyphiine'); very few true (desmitracheate) members of the subfamily Erigoninae, and no native members of the Linyphiinae (sensu stricto) or the Micronetinae, are present in the material studied. A total of 65 species is described, of which 44 are new. For the majority of the species it has been necessary to erect new genera, as follows: Catacercus (type species Gonatium fuegianum Tullgren), Cautinelia (type species C. minuta, new species), Ctenophysis (type species C. chilensis, new species), Hormembolus (type species Linyphia aysenensis Tullgren), Laminacauda (type species L. diffusa, new species), Notholepthyphantes (type species Lepthyphantes australis Tullgren), Notiophantes (type species Linyphia meridionalis Tullgren), Onychembolus (type species O. subalpinus, new species), Patagoneta (type species Linyphia antarctica Tullgren), Rhabdogyna (type species Bathyphantes patagonicus Tullgren), and Valdiviella (type species V. trisetosa, new species). The taxonomic relationships of the genera are discussed. A synapomorphy of the external female genitalia indicates a common parentage for the genera Hormembolus, Notiohyphantes, Patagoneta, and Notholepthyphantes, for the Falkland Islands genus Falklandoglenes Usher, and for the subfamily Mynogleninae, but the relationships to the Mynogleninae are not close enough to justify the allocation of any of the genera to that subfamily. Hormembolus is linked to the Linyphiinae (sensu stricto) by several synapomorphies, but because of differences in the epigynal form it cannot be included in that subfamily. The epigynal form of Notiohyphantes shows some similarities to that of the subfamily Micronetinae. The hypothesis is proposed that the most important branching event in the evolution of the Linyphiidae was that associated with the development of a scape/socket, and a cladogram on this basis is presented"--P. [1]

The Erigonine Spiders of North America. Part 7. Miscellaneous Genera (Araneae, Linyphiidae)

Volume: 12Start Page: 121End Page: 16

The Erigonine Spiders of North America. Part 6. The Genus Walckenaeria Blackwall (Araneae, Linyphiidae)

Volume: 11Start Page: 105End Page: 20

THREE NEW SPECIES OF THE SPIDER FAMILY LINYPHIIDAE FROM AUSTRALIA (ARANEAE)

Volume: 16Start Page: 211End Page: 21

The Erigonine Spiders of North America. Part 2. The Genus Spirembolus Chamberlin (Araneae: Linyphiidae)

Volume: 8Start Page: 109End Page: 15