A new genus of Theraphosid spider from Mexico, with a particular palpal bulb structure (Araneae, Theraphosidae, Theraphosinae)

Jorge I. Mendoza, Arturo Locht, Radan Kaderka, Francisco Medina, Fernando Pérez-Miles

Abstract


Magnacarina gen. nov. from Mexico is described. Hapalopus aldanus West, 2000 from Nayarit, is transferred to the new genus with an emended diagnosis creating the new combination Magnacarina aldana comb. nov. Three new species are described: Magnacarina moderata Locht, Mendoza & Medina sp. nov. from Nayarit and Sinaloa; Magnacarina primaverensis Mendoza & Locht sp. nov. and Magnacarina cancer Mendoza & Locht sp. nov., both from Jalisco. Magnacarina gen. nov. is characterized by an unusual bifid palpal bulb, and has a primary projection located in the central area of the palpal bulb and directed retrolaterally; this projection possesses the prolateral superior and retrolateral keels. Next to the primary projection is a secondary projection, which may be short or long, ending in the prolateral inferior and apical keel surrounding the sperm pore. This secondary projection may have prolateral accessory keels and is diagnosed by possessing a nodule of inwardly curled megaspines, located in the basal ventro-retrolateral region of metatarsi I in adult males. Additionally, male tibiae I possess three apophyses. Females of Magnacarina gen. nov. have a single reduced and strongly sclerotized spermatheca, with an apical lobe projecting ventrally, and with a uterus externus that is longer and wider than the spermatheca.

Keywords


tarantula; taxonomy; bulb morphology; tibial apophyses; new species

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DOI: https://doi.org/10.5852/ejt.2016.232

References


Bertani R. 2000. Male palpal bulbs and homologous features in Theraphosinae (Araneae, Theraphosidae). Journal of Arachnology 28 (1): 29–42.

Bertani R. 2001. Revision, cladistic analysis, and zoogeography of Vitalius, Nhandu, and Proshapalopus; with notes on other theraphosine genera (Araneae, Theraphosidae). Arquivos de Zoologia 36 (3): 265–356.

Estrada-Alvarez J.C. 2014. New data from mygalomorph spiders (Araneae: Mygalomorphae) of Estado de Mexico, with taxonomic comments about the genus Davus O. Pickard-Cambridge, 1892. Dugesiana 21: 55–66.

Gerschman B.S. & Schiapelli R.D. 1973. La subfamilia Ischnocolinae (Araneae, Theraphosidae). Revista del museo Argentino de ciencias naturales ‘Bernardino Rivadavia’ 4: 42–77.

Goloboff P.A. 1995. A revision of the South American spiders of the family Nemesiidae (Araneae, Mygalomorphae). Part I. Species from Peru, Chile, Argentina, and Uruguay. Bulletin of the American Museum of Natural History 224, American Museum of Natural History, New York.

Locht A., Medina F., Rojo R. & Vázquez I. 2005. Una nueva especie de tarántula del género Aphonopelma Pocock 1901 (Araneae, Theraphosidae, Theraphosinae) de México con notas sobre el género Brachypelma Simon 1891. Boletín de la Sociedad Entomologica Aragonesa 37: 105–108.

Locht A. 2008. Estudio sobre la sistemática y distribución de la familia Theraphosidae (Arachnida, Araneae) en México. Master thesis, Facultad de Ciencias, Universidad Nacional Autónoma de México, México City.

Locht A. & Medina F. 2008. Una nueva especie de tarántula del género Bonnetina Vol, 2000 (Araneae, Theraphosidae, Theraphosinae), de México. Boletín de la Sociedad Entomológica Aragonesa 43: 45–48.

Mendoza J.I. 2012a. Bonnetina papalutlensis a new species of tarantula from Guerrero, Mexico, with notes on reproduction (Araneae, Theraphosidae, Theraphosinae). Revista Ibérica de Aracnología 20: 57–62.

Mendoza J.I. 2012b. Cotztetlana omiltemi, a new genus and species of tarantula from Guerrero, México (Araneae, Theraphosidae, Theraphosinae). Arthropoda Scientia 2: 2–7.

Mendoza J.I. 2014a. Taxonomic revision of Hemirrhagus Simon, 1903 (Araneae: Theraphosidae, Theraphosinae), with description of five new species from Mexico. Zoological Journal of the Linnean Society 170 (4): 634–689. http://dx.doi.org/10.1111/zoj.12112 10.1111/zoj.12112

Mendoza J.I. 2014b. Psalmopoeus victori, the first arboreal theraphosid spider described for Mexico (Araneae: Theraphosidae: Aviculariinae). Revista Mexicana de Biodiversidad 85 (3): 728–735. http://dx.doi.org/10.7550/rmb.44597

Ortíz D. & Francke O. 2014. Two new species of Bonnetina tarantulas (Theraphosidae: Theraphosinae) from Mexico: contributions to morphological nomenclature and molecular characterization of types. Journal of Natural History 49 (11–12): 685–707. http://dx.doi.org/10.1080/00222933.2014.924770

Pérez-Miles F. 1994. Tarsal scopula division in Theraphosinae (Araneae, Theraphosidae): Its systematic significance. Journal of Arachnology 22: 46–53.

Schmidt G. 2003. Die Vogelspinnen: Eine weltweite Übersicht. Neue Brehm-Bücherei 641, Westarp-Wissenschaften, Hohenwarsleben.

Schmidt G. 2012. Bonnetina (Pachytheca) tanzeri subgen. et sp. n., eine bisher unbeschriebene Vogelspinnenart aus Mexiko (Araneae: Theraphosidae: Theraphosinae). Arthropoda Scientia 2: 21–28.

Vol F. 1999. À propos d’une spermathèque inhabituelle. Arachnides 42: 1–13.

Vol F. 2000. Description de Bonnetina cyaneifemur, gen. n. & sp. n. (Araneae, Theraphosidae, Theraphosinae) du Mexique. Arachnides 44: 2–9.

Vol F. 2001. Description d’une deuxième espèce de Bonnetina Vol, 2000 du Mexique, B. rudloffi sp. n. (Araneae, Theraphosidae, Theraphosinae) et comparaison avec B. cyaneifemur. Arachnides. 48: 7–16.

West R.C. 2000. Some new theraphosids from western Mexico (Araneae, Mygalomorphae). The Southwestern Naturalist 45 (3): 299–305. http://dx.doi.org/10.2307/3672832

World Spider Catalog. 2016. Natural History Museum Bern. Available online at http://wsc.nmbe.ch, version 17.0 [accessed 20 Feb. 2016].


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