Browsing by Author "Fannes, Wouter."
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Item The goblin spider genus Zyngoonops (Araneae, Oonopidae), with notes on related taxa. (Bulletin of the American Museum of Natural History, no. 379)(American Museum of Natural History., 2013-06-18) Fannes, Wouter.; Goblin Spider Planetary Biodiversity Inventory.The goblin spider genus Zyngoonops Benoit, 1977 is revised. The type and hitherto only species, Z. clandestinus Benoit from the Democratic Republic of Congo (D.R.C.), is redescribed on the basis of topotypical material. Nine new species are described from the D.R.C. (Z. moffetti, Z. redii, Z. goedaerti, Z. rockoxi, Z. beatriceae, Z. chambersi, Z. swammerdami, Z. marki) and the Central African Republic (Z. walcotti). Members of Zyngoonops show remarkable modifications of the sternum and pedicel tube: the sternum has two heavily sclerotized posterior extensions, and the pedicel tube has a protruding ventral lip. The female genitalia are complex, consisting of an epigastric scape, two uterine sclerites, and a long genital duct. In most species, the distal part of the duct is highly coiled. Males resemble those of Antoonops Fannes and Jocqué and Coxapopha Platnick in having elaborately modified endites, a pair of pleural flaps, and a carapace with extended anterolateral corners. The type species of Coxapopha is redescribed, and new images of the female genitalia of Antoonops and Coxapopha are provided. A cladistic analysis of morphological characters provides support for the monophyly of Zyngoonops and identifies Z. redii as the most basal species of the genus.Item Got males? : the enigmatic goblin spider genus Triaeris (Araneae, Oonopidae). (American Museum novitates, no. 3756)(American Museum of Natural History., 2012-09-14) Platnick, Norman I.; Dupérré, N. (Nadine); Ubick, Darrell.; Fannes, Wouter.; Goblin Spider Planetary Biodiversity Inventory.The type species of the goblin spider genus Triaeris Simon, T. stenaspis Simon, was originally described from Saint Vincent in the Lesser Antilles, but has attained a pantropical distribution and even has introduced populations living in European greenhouses. At least one of those European populations is parthenogenetic, and no males of the species have ever been found. Simon later assigned one additional species to the genus, T. equestris, from Príncipe; that species is also known only from females, but resembles T. stenaspis in having an unusually elongated, ventrally spinose patella on leg I. Numerous other species, from both the Old and New worlds, have subsequently been assigned to Triaeris; all those taxa seem to be either synonyms (including T. berlandi Lawrence from the Democratic Republic of the Congo, T. lepus Suman from Hawaii, and T. lacandonus Brignoli from Guatemala, which are newly synonymized with T. stenaspis) or misplaced in the genus. The modified patella I occurs in four new West African species (T. moca from Bioko and T. fako, T. oku, and T. menchum from Cameroon); unfortunately, those species are also represented only by females. Few other gamasomorphines have patellar spines, and most of those that do have such spines belong to a group of genera in which the males have heavily sclerotized endites, suggesting that Triaeris might belong to that group. Searching West African collections of such taxa revealed two additional new species, T. togo and T. ibadan, that are each represented by both sexes. Female genitalic structure suggests that T. togo is the closest relative of T. stenaspis.Item On Melchisedec, a new genus of the spider family Oonopidae (Araneae, Dysderoidea). (American Museum novitates, no. 3702)(American Museum of Natural History., 2010) Fannes, Wouter.A new genus, Melchisedec, is established for two new Afrotropical species, M. thevenot (type species) and M. birni. These spiders are unique among oonopids in having a crest on the ventral pedicel sclerite, and in having very short, scepterlike setae on the distal metatarsi I and II. The male of M. thevenot has a long, inward-curved embolus-conductor complex and a sternal pouch. The embolus-conductor complex resembles that of the Australian genus Grymeus Harvey, but differs in important details. The genital system of the female is highly complex, and includes two uterine sclerites, two winglike lateral apodemes and a receptaculum with a globular appendix. The receptaculum is much larger than in most other Oonopidae and has an unusual, strongly folded surface.Item Tarsal organ morphology and the phylogeny of goblin spiders (Araneae, Oonopidae), with notes on basal genera. (American Museum novitates, no. 3736)(American Museum of Natural History., 2012-02-29) Platnick, Norman I.; Abrahim, Naiara.; Alvarez-Padilla, Fernando.; Andriamalala, Daniela.; Baehr, Barbara, 1953-; Baert, L.; Bonaldo, Alexandre B.; Brescovit, Antonio D.; Chousou-Polydouri, Natalia.; Dupérré, N. (Nadine); Eichenberger, Beata.; Fannes, Wouter.; Gaublomme, Eva.; Gillespie, Rosemary G., 1957-; Grismado, Cristian J.; Griswold, Charles E.; Harvey, Mark S.; Henrard, Arnaud.; Hormiga, Gustavo.; Izquierdo, Matías A.; Jocqué, R.; Kranz-Baltensperger, Yvonne.; Kropf, Christian.; Ott, Ricardo.; Ramírez, Martín J.; Raven, Robert J.; Rheims, Cristina A.; Ruiz, Gustavo R. S.; Santos, Adalberto J.; Saucedo, Alma D.; Sierwald, Petra.; Szűts, Tamás.; Ubick, Darrell.; Wang, Xin-Ping.Based on a survey of a wide variety of oonopid genera and outgroups, we hypothesize new synapomorphies uniting the Oonopidae (minus the South African genus Calculus Purcell, which is transferred to the Orsolobidae). The groundplan of the tarsal organ in Oonopidae is hypothesized to be an exposed organ with a distinctive, longitudinal ridge originating from the proximal end of the organ, and a serially dimorphic pattern of 4-4-3-3 raised receptors on legs I-IV, respectively. Such organs typify the diverse, basal, and ancient genus Orchestina Simon. Several other genera whose members resemble Orchestina in retaining two plesiomorphic features (an H-shaped, transverse eye arrangement and a heavily sclerotized, thick-walled sperm duct within the male palp) are united by having tarsal organs that are partly (in the case of Cortestina Knoflach) or fully capsulate (in the case of Sulsula Simon, Xiombarg Brignoli, and Unicorn Platnick and Brescovit). The remaining oonopids are united by the loss of the heavily sclerotized palpal sperm duct, presumably reflecting a significant transformation in palpal mechanics. Within that large assemblage, a 4-4-3-3 tarsal organ receptor pattern and an H-shaped eye arrangement seem to be retained only in the New Zealand genus Kapitia Forster; the remaining genera are apparently united by a reduction in the tarsal organ pattern to 3-3-2-2 raised receptors on legs I-IV and by the acquisition of a clumped eye arrangement. Three subfamilies of oonopids are recognized: Orchestininae Chamberlin and Ivie (containing only Orchestina; Ferchestina Saaristo and Marusik is placed as a junior synonym of Orchestina), Sulsulinae, new subfamily (containing Sulsula, Xiombarg, Unicorn, and Cortestina), and Oonopinae Simon (containing all the remaining genera, including those previously placed in the Gamasomorphinae). The type species of Sulsula and Kapitia, S. pauper (O. P.-Cambridge) and K. obscura Forster, are redescribed, and the female of S. pauper is described for the first time. A new sulsuline genus, Dalmasula, is established for Sulsula parvimana Simon and four new species from Namibia and South Africa.Item Ultrastructure of Antoonops, a new, ant-mimicking genus of Afrotropical Oonopidae (Araneae) with complex internal genitalia ; American Museum novitates, no. 3614(New York, NY : American Museum of Natural History, 2008) Fannes, Wouter.; Jocqué, R.Antoonops, a new genus of the spider family Oonopidae, is described from West Africa. The genus contains four new species, all known from both sexes: A. corbulo (type species), A. bouaflensis, A. iita, and A. nebula. All species mimic ants and exhibit a pronounced sexual dimorphism. Several new ultrastructural features are reported, including putative gland pores associated with the coxal insertions, specialized cheliceral setae, and peculiarly modified male endites. The potential of these and other traits as phylogenetically informative characters is discussed. SEM investigation of the internal female genitalia of A. corbulo reveals the presence of two peculiarly shaped sclerites embedded in the walls of the uterus externus and a reproductive tract with an apparent flow-through design.