Revision of the Ecuadorian Microstigmatidae (Araneae: Mygalomorphae), with the description of six new species

  • Nadine Dupérré Museum of Nature Hamburg, Zoology, Leibniz-Institute for the Analysis of Biodiversity Change (LIB), Center for Taxonomy and Morphology, Martin-Luther-King-Platz 3, D-20146 Hamburg, Germany https://orcid.org/0000-0003-2195-878X
  • Elicio Tapia Museum of Nature Hamburg, Zoology, Leibniz-Institute for the Analysis of Biodiversity Change (LIB), Center for Taxonomy and Morphology, Martin-Luther-King-Platz 3, D-20146 Hamburg, Germany https://orcid.org/0000-0001-9005-5328
Keywords: diversity, tarsal organ, pustulose cuticle, scaly cuticle

Abstract

The small mygalomorph family Microstigmatidae Roewer, 1942 from Ecuador is reviewed, and images of the blind cave species, Spelocteniza ashmolei Gertsch, 1982 are presented. Six new species are described, and one new genus is erected: Pseudonemesia scutata sp. nov. (), Spelocteniza pampenita sp. nov. (♀), Spelocteniza zuninoi sp. nov. (), and Pastaza gen. nov., Pastaza aureliae gen. et sp. nov. (♀), Pastaza roberti gen. et sp. nov. (♀) and Pastaza vegai gen. et sp. nov. (♂). SEM images of the cuticle and tarsal organ of all genera are provided, and finally, the presently recognised diagnostic characteristics of the family are discussed.

References

Álvarez-Padilla F. & Hormiga G. 2007. A protocol for digesting internal soft tissues and mounting spiders for scanning electron microscopy. Journal of Arachnology 35: 538–542. https://doi.org/10.1636/sh06-55.1

Caporiacco L.di. 1955. Estudios sobre los aracnidos de Venezuela. 2a parte: Araneae. Acta Biologica Venezuelica 1: 265–448.

Dippenaar-Schoeman A.S., Van Der Merwe M. & Van Den Berg A.M. 2006. Habitat preferences and seasonal activity of the Microstigmatidae from Ngome State Forest, South Africa (Arachnida: Araneae). Koedoe 49: 85–89. https://doi.org/10.4102/koedoe.v49i1.91

Dippenaar-Schoeman A.S., Haddad C.R. & Foord S.H. 2021. South African National Survey of Arachnida Photo Identification Guide: The Microstigmatidae of South Africa. Version 1: 1–11. Zenodo. https://doi.org/10.5281/zenodo.6735731

Gertsch W.J. 1982. The troglobitic mygalomorphs of the Americas (Arachnida, Araneae). Association for Mexican Cave Studies Bulletin 8: 79–94

Goloboff P.A. 1989. Xenonemesia, un nuevo género de Nemesiidae (Araneae, Mygalomorphae). Journal of Arachnology 16 (3): 357–363.

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: 1–189.

Griswold C.E. 1985. A revision of the African spiders of the family Microstigmatidae (Araneae: Mygalomorphae). Annals of the Natal Museum 27: 1–37.

Guevara J.E., Mogollón H., Cerón C. & Josse C. 2013a. Región Amazonia. Bosque siempreverde piemontano del Norte de la Cordillera Oriental de los Andes. In: Galeras R., Guevara J.E., Medina-Torres B., Chinchero M.A. & Herrera X. (eds) Sistema de Clasificación de Ecosistemas del Ecuador Continental: 108–110. Ministerio del Ambiente del Ecuador, Ecuador, Quito.

Guevara J.E., Pitman N., Mogollón, H., Cerón, C. & Palacios W. 2013b. Región Amazonia. Bosque siempreverde de tierras bajas del Napo-Curaray. In: Galeras R., Guevara J.E., Medina-Torres B., Chinchero M.A. & Herrera X. (eds) Sistema de Clasificación de Ecosistemas del Ecuador Continental: 178–180. Ministerio del Ambiente del Ecuador, Ecuador, Quito.

Indicatti R.P. & Villarreal E. 2016. Pseudonemesia tabiskey, a new species of Pseudonemesia Caporiacco 1955 and new ultramorphological data for the Microstigmatinae (Araneae: Microstigmatidae). Journal of Natural History 50 (33/34): 2153–2167. https://doi.org/10.1080/00222933.2016.1196297

Iglesias, J., Santiana, J. & Chinchero M.A. 2013a. Región Andes. Bosque siempreverde montano de Cordillera Occidental de los Andes. In: Galeras R., Guevara J.E., Medina-Torres B., Chinchero M.A. & Herrera X. (eds) Sistema de Clasificación de Ecosistemas del Ecuador Continental: 88–90. Ministerio del Ambiente del Ecuador, Ecuador, Quito.

Iglesias, J., Santiana, J. & Chinchero M.A. 2013b. Región Andes. Bosque siempreverde montano bajo de Cordillera Occidental de los Andes. In: Galeras R., Guevara J.E., Medina-Torres B., Chinchero M.A. & Herrera X. (eds) Sistema de Clasificación de Ecosistemas del Ecuador Continental: 86–88. Ministerio del Ambiente del Ecuador, Ecuador, Quito.

Main B.Y. & Mascord R. 1969. A new genus of diplurid spider (Araneae: Mygalomorphae) from New South Wales. Journal of the Entomological Society of Australia, New South Wales 6: 24–30.

Montes de Oca L., Indicatti R.P., Opatova V., Almeida M., Pérez-Miles F. & Bond J.E. 2022. Phylogenomic analysis, reclassification, and evolution of South American nemesioid burrowing mygalomorph spiders. Molecular Phylogenetics and Evolution 168: 1–19. https://doi.org/10.1016/j.ympev.2021.107377

Opatova V., Hamilton C.A., Hedin M., Montes de Oca L., Král J. & Bond J.E. 2020. Phylogenetic systematics and evolution of the spider infraorder Mygalomorphae using genomic scale data. Systematic Biology 69 (4): 671–707. https://doi.org/10.1093/sysbio/syz064

Ott R. & Höfer H. 2004. Envia garciai, a new genus and species of mygalomorph spiders (Araneae, Microstigmatidae) from Brazilian Amazonia. Iheringia, Série Zoologia 93 (4): 373–379. https://doi.org/10.1590/s0073-47212003000400004

Passanha V., Cizauskas I. & Brescovit A.D. 2019. A new genus of Micromygalinae (Araneae, Microstigmatidae) from Brazil, with transfer of Masteria emboaba Pedroso, Baptista & Bertani, 2015 and description of six new species. ZooKeys 814: 1–32. https://doi.org/10.3897/zookeys.814.29906

Platnick N.I. & Forster R.R. 1982. On the Micromygalinae, a new subfamily of mygalomorph spiders (Araneae, Microstigmatidae). American Museum Novitates 2734: 1–13.

Raven R.J. 1981. A review of the Australian genera of the mygalomorph spider subfamily Diplurinae (Dipluridae: Chelicerata). Australian Journal of Zoology 29 (3): 321–363. https://doi.org//10.1071/ZO9810321

Raven R.J. 1985. The spider infraorder Mygalomorphae (Araneae): cladistics and systematics. Bulletin of the American Museum of Natural History 182: 1–180.

Raven R.J. & Platnick N. 1981. A revision of the American spiders of the family Microstigmatidae (Araneae, Mygalomorphae). American Museum Novitates 2707: 1–20.

Raven R.J. & Schwendinger P.J. 1995. Three new mygalomorph spider genera from Thailand and China (Araneae). Memoirs of the Queensland Museum 38 (2): 623–641.

Reisinger P.W.M., Focke P. & Linze B. 1990. Lung morphology of the tarantula, Eurypelma californicum Ausserer, 1871 (Aranea: Theraphosidae). Bulleting British Arachnological Society 8 (6): 165–170.

Roewer C.F. 1942. Katalog der Araneae von 1758 bis 1940. 1. Band (Mesothelae, Orthognatha, Labidognatha: Dysderaeformia, Scytodiformia, Pholciformia, Zodariiformia, Hersiliaeformia, Argyopiformia). Natura, Buchhandlung für Naturkunde und exakte Wissenschaften Paul Budy, Bremen.

Santiana J., Báez S. & Guevara J. 2013a. Región Andes. Bosque siempreverde montano del norte de la Cordillera Oriental de los Andes. In: Galeras R., Guevara J.E., Medina-Torres B., Chinchero M.A. & Herrera X. (eds) Sistema de Clasificación de Ecosistemas del Ecuador Continental: 112–114. Ministerio del Ambiente del Ecuador, Ecuador, Quito.

Santiana J., Báez S. & Guevara J. 2013b. Región Andes. Bosque siempreverde montano bajo del norte de la Cordillera Oriental de los Andes. In: Galeras R., Guevara J.E., Medina-Torres B., Chinchero M.A. & Herrera X. (eds) Sistema de Clasificación de Ecosistemas del Ecuador Continental: 110–112. Ministerio del Ambiente del Ecuador, Ecuador, Quito.

Simon E. 1887. Observation sur divers arachnides: synonymies et descriptions. Annales de la Société Entomologique de France (6) 7 (Bull.): 158–159, 175–176, 186–187, 193–195.

Strand E. 1932. Miscellanea nomenclatorica zoologica et palaeontologica, III, IV. Folia Zoologica et Hydrobiologica, Rigā 4: 133–147, 193–196.

WSC 2025. World Spider Catalog. Ver. 26. Natural History Museum Bern. Available from https//wsc.nmbe.ch [accessed 27 Feb. 2025].

Published
2025-08-08
How to Cite
Dupérré, N., & Tapia, E. (2025). Revision of the Ecuadorian Microstigmatidae (Araneae: Mygalomorphae), with the description of six new species. European Journal of Taxonomy, 1007(1), 87–132. https://doi.org/10.5852/ejt.2025.1007.2999
Section
Research article