Author: Martín J. RamírezPublisher:
ISBN:
Category :
Languages : en
Pages : 262
Book Description
The Spider Subfamily Amaurobioidinae (Araneae, Anyphaenidae): a Phylogenetic Revision at the Generic Level ; 29 Tables
Author: Martín J. RamírezThe Spider Subfamily Amaurobioidinae (Araneae, Anyphaenidae)
Author: Martín J. RamírezPublisher:
ISBN:
Category : Amaurobioidinae
Languages : en
Pages : 268
Book Description
A cladistic phylogenetic analysis at generic level of the subfamily Amaurobioidinae is presented. The analysis is based on a dataset of 93 representative species scored for one behavioral and 199 morphological characters. Tree searches were made under equal and implied weights according to homoplasy, and the results were compared in terms of sensitivity to jackknife resampling. Mildest weighting functions produced trees more robust to resampling, and those results were selected as the working phylogenetic hypotheses. Groups of weak support as identified by jackknifing and Bremer indices are in general those that vary in resolution with different character-weighting schemes. Seven outgroup representatives were included (Malenella nana Ramírez, from Malenellinae, and six Anyphaeninae species). In this analysis Anyphaeninae, previously identified as sister group of Amaurobioidinae, is paraphyletic, but forcing its monophyly does not alter the groupings within Amaurobioidinae. The monophyly of the genera is in general well supported, but some particularly conflicting groups are discussed. In contrast, the relationships among genera are in general problematic. Amaurobioidinae is diagnosed by a pronounced indentation at the base of male palpal tegulum, and by a particular male copulatory bulb conformation, with a paramedian apophysis. The subfamily is classified in two tribes (Gayennini and Amaurobioidini); the genus Josa Keyserling, probably sister group to Gayennini, is not assigned to either tribe. The tribe Amaurobioidini is mainly diagnosed by an apical loop of the sperm duct in the male copulatory bulb. It includes 10 genera: Amaurobioides O.P.-Cambridge is restricted to seashores of southern continents. Clubiona chilensis Nicolet, transferred to Amaurobioides, is the first true record of the genus for South America. The male of Axyracrus elegans Simon, three species of Aysenia Tullgren, and three of Coptoprepes Simon are newly described. Four new genera are proposed in Amaurobioidini: Gamakia, Selknamia (described for one new species each), Aysenoides (for three new species), and Negayan (type species Gayenna tridentata Simon, including also Axyracrus coccineus Mello-Leitão, Clubiona paduana Karsch, Gayenna excepta Tullgren, Gayenna exigua Mello-Leitão, and Tomopisthes lebruni Simon). The previously revised genera Acanthoceto Mello-Leitão and Ferrieria Tullgren are also included in the tribe. The basal branch and most intergeneric branches of the tribe have low support values. Amaurobioides and Negayan, however, are relatively well supported. The tribe Gayennini is well defined by a homogeneous conformation of male and female genitalia, with a distinctive secondary conductor and spherical spermathecae. It includes 11 genera: Gayenna Nicolet includes only G. americana Nicolet from Chile and adjacent Argentina. Arachosia O.P.-Cambridge comprises many species previously assigned to Oxysoma. Abuzaida striata Keyserling, Anyphaena oblonga Keyserling, Gayenna proseni Mello-Leitão, Gayenna duplovittata Mello-Leitão, Gayenna bonneti Mello-Leitão, Oxysoma dubium Berland, Oxysoma bifasciatum Mello-Leitão, Oxysoma cubana Banks, Oxysoma polytrichium Mello-Leitão, Phidyle bergi Simon, and Samuza praesignis Keyserling are transferred to Arachosia. The males of Arachosia bergi (Simon), A. honesta Keyserling, and Arachosia praesignis (Keyserling) are newly described. Arachosia is easily recognized by the thick setae on the anterior lateral spinnerets, and it has good support values. A very diverse group of species here assigned to the genus Sanogasta Mello-Leitão is paraphyletic in terms of Arachosia. It includes many of the species formerly placed in Gayenna Nicolet. Anyphaena maculatipes Keyserling, Clubiona maculosa Nicolet, Gayenna paucilineata Mello-Leitão, Gayenna alticola Simon, Gayenna bonariensis Mello-Leitão, Gayenna rufithorax Tullgren, Gayenna x-signata Keyserling, Gayenna approximata Tullgren, Samuza minuta Keyserling, and Tomopisthes backhauseni Simon are transferred to Sanogasta. The female of Sanogasta alticola (Simon), the males of S. x-signata (Keyserling) and S. approximata (Tullgren), and four species are newly described. The males of Monapia carolina Ramírez and Monapia angusta (Mello-Leitão) are newly described. A new species of Oxysoma Nicolet from southern Brazil is described, and Gayenna saccata Tullgren is transferred to Oxysoma. Phidyle Simon is removed from the synonymy of Oxysoma Nicolet; the male of its only species Phidyle punctipes (Nicolet) is newly described. The genus Philisca Simon is redefined to include Liparotoma Simon. Clubiona tripunctata Nicolet and Clubiona gayi Nicolet are also transferred to Philisca. The male of Philisca hahni Simon and two species are newly described. The genus is reasonably supported, except for one basal species of questionable placement. Anyphaena punctata Keyserling, Gayenna fuscotaeniata Keyserling, Gayenna tripunctata Mello-Leitão, Gayenna reticulata Mello-Leitão, Gayenna taperae Mello-Leitão, Oxysoma quinquenotatum Simon, Oxysoma unipunctatum Simon, Oxysoma novum Mello-Leitão, Oxysoma lineatum Tullgren, and Tomopisthes frenatus Mello-Leitão are transferred to Tasata. The males of Tasata parcepunctata Simon, T. variolosa Mello-Leitão, and three species are newly described. Tasata albofasciata Mello-Leitão is transferred to Tupirinna Bonaldo, in the Corinnidae. Tomopisthes Simon includes only three species from Chile and adjacent Argentina. Clubiona horrenda Nicolet and Clubiona pusilla Nicolet are transferred to Tomopisthes. The male of Tomopisthes pusillus (Nicolet) is newly described. Two new genera are proposed in Gayennini: Araiya (Gayenna pallida Tullgren, type species and Gayenna coccinea Simon) and Gayennoides (for two new Chilean species). The genus Josa Keyserling, distinguished by a femoral apophysis on the male palp, is extremely diverse in Andean cloud forests and tropical America. It is one of the better supported groups of the analysis. Anyphaena keyserlingi L. Koch, Gayenna andesiana Berland, Gayenna simoni Berland, Gayennella riveti Berland, Haptisus nigrifrons Simon, Haptisus analis Simon, Haptisus maurus Simon, Olbophthalmus lojensis Berland, Olbus personatus Simon, Olbus gounellei Simon, Tetromma luteum Keyserling, and Tomopisthes chazaliae Simon are transferred to Josa. The male of Josa riveti (Berland) and one species are newly described. The following names are newly synonymized: Cluilius Simon, with Amaurobioides O.P.-Cambridge; Schiapellia Mello-Leitão, with Axyracrus Simon; Schiapellia gerschmanni Mello-Leitão and Amaurobioides boydi Forster, with Axyracrus elegans Simon; Tomopisthes magellanicus Simon and Gayenna strigosa Tullgren, with Clubiona (now Negayan) paduana Karsch; Tetromma Keyserling (preoccupied), Haptisus Simon, Olbophthalmus Simon, and Gayennella Berland, with Josa Keyserling; Anyphaena pilosa Keyserling and Gayenna riveti Berland, with Tetromma (now Josa) luteum Keyserling; Pelayo insignis Banks, with Haptisus (now Josa) nigrifrons Simon; Samuza Keyserling, Abuzaida Keyserling, and Gayennina Gertsch, with Arachosia O.P.-Cambridge; Tomopisthes tripunctatus Mello-Leitão, with Samuza (now Arachosia) praesignis Keyserling; Oxysoma ramboi Mello-Leitão, with Arachosia honesta Keyserling; Sanogasta intermedia Mello-Leitão, with Anyphaena (now Sanogasta) maculatipes Keyserling; Gayenna monticola Chamberlin, with Gayenna alticola Simon; Clubiona sternalis Nicolet, Anyphaena ignota Keyserling, Gayenna affinis Tullgren, Gayenna dubia Tullgren, Tomopisthes conspersus Simon, Tomopisthes modestus Simon, Tomopisthes taeniatus Simon, Gayenna skottsbergi Berland, and Tomopisthes injucundus Simon, with Clubiona (now Sanogasta) maculosa Nicolet; Tomopisthes kraepelini Simon, with Gayenna approximata Tullgren; Liparotoma Simon, with Philisca Simon; Philisca navarinensis Tullgren, with Philisca hahni Simon; Heteromma Karsch (preoccupied), with Tomopisthes Simon; Tomopisthes immanis Simon, Heteromma fuegiana Karsch, Philisca sica Strand, and Nonianus argentinus Mello-Leitão, with Clubiona (now Tomopisthes) horrenda Nicolet; Gayenna chilensis Tullgren, with Clubiona (now Tomopisthes) pusilla Nicolet; Gayenna stellata Simon, with Gayenna (now Araiya) coccinea Simon; Oxysoma punctipes Nicolet, Oxysoma aurata Nicolet, Oxysoma longipes Nicolet, Oxysoma lineata Nicolet, and Aporatea valdiviensis Simon, with Oxysoma punctatum Nicolet. The following names, previously listed in Anyphaenidae, are considered nomina dubia: Anyphaena pampa Holmberg, Clubiona albiventris Nicolet, Clubiona citrina Nicolet, Clubiona gemella Nicolet, Clubiona gibbosa Nicolet, Clubiona lepida Nicolet, Clubiona limbata Nicolet, Clubiona lineata Nicolet, Clubiona nigricans Nicolet, Clubiona nubes Nicolet, Clubiona pulchella Nicolet, Clubiona puella Nicolet, Clubiona versicolor Nicolet, Oxysoma auratum Nicolet, Oxysoma delfini Simon, and Tomopisthes aethiops Simon.
Revision and Phylogenetic Analysis of the Spider Genus Philisca Simon (Araneae: Anyphaenidae, Amaurobioidinae)
Author: Eduardo M. SotoPublisher:
ISBN: 9781869779931
Category : Anyphaenidae
Languages : en
Pages : 65
Book Description
A Revision and Phylogenetic Analysis of the Spider Genus Oxysoma Nicolet (Araneae
Author: Santiago AisenPublisher:
ISBN: 9781775577614
Category :
Languages : en
Pages : 61
Book Description
The spider family Micropholcommatidae (Arachnida: Araneae: Araneoidea): a relimitation and revision at the generic level
Author: Mihael G. RixPublisher: PenSoft Publishers LTD
ISBN: 9546425311
Category : Science
Languages : en
Pages : 328
Book Description
The Micropholcommatidae are a family of tiny, distinctive araneoid spiders, known from southern-temperate habitats throughout Australasia and Chile. The greatest abundance of individuals and the largest diversity of taxa occur in the cool-temperate rainforests of south-eastern Australia and New Zealand, where micropholcommatid spiders can be very common within moss and leaf litter microhabitats. Although poorly studied biologically and largely neglected taxonomically, the Micropholcommatidae are a diverse lineage, with a significantÿ The monograph in this volume presents a complete generic-level revision of the spider family Micropholcommatidae. The phylogenetic position and internal phylogeny of the family are tested with two separate morphological cladistic analyses, the results of which inform a comprehensive generic-level classification. In total, 26 new species, 12 new genera, one new tribe and two new subfamilies are described, taking the total documented micropholcommatid fauna to 58 species. The distribution and Gondwanan biogeography of the family are also discussed, and natural history information is provided where known. Most importantly, the results of this paper present a taxonomic framework and a phylogenetic foundation for all future research on the Micropholcommatidae; a template by which new species can be described and existing species can be identified, and a valuable dataset for exploring phylogenetic hypotheses.
Bulletin of the American Museum of Natural History
Author: Revision and Phylogenetic Analysis of the Spider Subfamily Phyxelidinae (Araneae, Amaurobiidae). Bulletin of the AMNH
Author: Taxonomic Revision of the American Spider Genus Arachosia (Araneae: Anyphaenidae)
Author: Gonzalo D. RubioPublisher:
ISBN: 9781775576600
Category :
Languages : en
Pages : 105
Book Description
We review the American spider genus Arachosia O.P.-Cambridge, and present a descriptive taxonomic study with a comparative dichotomous key including 21 species, of which seven are newly described (A. avalosi sp. nov., A. carancho sp. nov., A. kapiipeoi sp. nov., A. magna sp. nov., A. monserrate sp. nov., A. pinhalito sp. nov. and A. tungurahua sp. nov.). Four species names are considered nomina dubia: Oxysoma dubium Berland, Gayenna duplovittata Mello-Leitão, Oxysoma polytrichium Mello-Leitão, and Arachosia sulfurea Mello-Leitão. Arachosia bonneti (Mello-Leitão) is newly synonymized with A. albiventris Mello-Leitão, and A. mezenioides Mello-Leitão with A. freiburgensis Keyserling. Previous problems with the identification of species in a species complex including A. cubana (Banks) are resolved. A disjunct distributional pattern is reported for A. kapiipeoi sp. nov.; a preliminary phylogenetic analysis based on mitochondrial COI sequences shows that these may correspond with two cryptic species. In this contribution, grassland and forests are discussed as the two main habitats inhabited by species of Arachosia. Finally, we propose a hypothesis of matching sexes based on functionality of some genital structures, involving sclerites of the male copulatory organ with structures of the epigyne: the prolateral projection on the primary conductor of the male would have a direct interaction with the lateral projections of the anterior pouch on the median epigynal field of females. Key words: Spider, American, Araneae, Anyphaenidae.
Author: Charles E. Griswold
Author: