Osvaldo VILLARREAL Manzanilla - papers on Opiliones

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Osvaldo VILLARREAL Manzanilla

Birthdate: 4 November 1977

Birthplace: Caracas, Venezuela

BIOGRAPHY: Adventurer, poet, scientist, friend, student... Osvaldo is struggling to become an established researcher in Venezuela. He has strong bounds with Brazil, especially with the National Museum in Rio where he spent some time between 2004 and 2016.

Spent some time in the Andes, but also lived in Rio de Janeiro, Brazil, where he did his Ph. D. thesis with a systematic review of Cranaidae. He focuses his research on Cranaidae, Nomoclastidae and Stygnidae.

External collaborator - Laboratorio de Aracnologia - Museu Nacional, Universidade Federal do Rio de Janeiro.

Research associate - Museo del Instituto de Zoología Agrícola, Facultad de Agronomía, UCV-Maracay.

See Osvaldo more updated stuff at Research Gate.


Picture of Osvaldo taken during fieldwork in 2019 at Parque Nacional Henri Pittier (Aragua).

Biographical sketch by adrik.

DISCLAIMER — This resource was first intended as for private use of the members of the arachnology lab of Museu Nacional, but later we thought "why not to share this with the world?". Eventually if greedy lawyers (redundance...) start to bother us with copyright matters, etc, we may have to be forced to quit the project and keep this just to ourselves.

Note: As Osvaldo has a diverse simultaneous output with both Opiliones and other arachnids, they are listed together in the following table. The word Opiliones is higlighted where appropriate.

2020 / in prep.
García, A.F., & Villarreal, O. (2020). Description of a new species of Leptostygnus Mello–Leitão, 1940 and notes on the male genitalia in the subfamily Leiosteninae (Opiliones: Agoristenidae). Studies on Neotropical Fauna and Environment, 1-15.
Medrano, M., Villarreal, O., & Kury, A.B. (2019). Review of Neocynorta Roewer, 1915 with two new generic synonymies (Opiliones: Gonyleptoidea: Cosmetidae). Journal of Natural History, 53(11-12), 677-704.
Villarreal, O., Ázara, L.N.D., & Kury, A.B. (2019). Revalidation of Obidosus Roewer, 1913 and description of two new cave-dwelling species of Protimesius Roewer, 1913 from Brazil (Opiliones: Stygnidae). Journal of Natural History, 53(15-16), 965-989.
Villarreal, M.O., Sánchez, N., & De Ascenção, A. (2019). New generic assignment to the harvestman Metaphareus punctatus (Opiliones: Stygnidae) and observations about it reproductive behavior. Iheringia. Série Zoologia, 109.
Moreno-Gonzalez, J.A., & Villarreal, M.O. (2017). Two new species of Calima Moreno-González and Villarreal, 2012 (Arachnida: Schizomida: Hubbardiidae) from the Colombian Andes, with a discussion on the male flagellar microsetae of Hubbardiinae. Journal of Natural History, 51(45-46), 2681-2700.
Giupponi, A.P.L., Miranda, G.S., & Villarreal, M.O. (2016). Rowlandius dumitrescoae species group: new diagnosis, key and description of new cave-dwelling species from Brazil (Schizomida, Hubbardiidae). ZooKeys, (632), 13.
Indicatti, R.P., & Villarreal, M.O. (2016). Pseudonemesia tabiskey, a new species of Pseudonemesia Caporiacco 1955 and new ultramorphological data for the Microstigmatinae (Araneae: Microstigmatidae). Journal of Natural History50(33-34), 2153-2167.
Villarreal, M.O., & García, A.F. (2016). Unveiling the diversity of Phalangodus Gervais, 1842 (Opiliones: Cranaidae): descriptions of four new species from Colombia. European Journal of Taxonomy, (242).
Villarreal, M.O., de Miranda, G.S., & Giupponi, A.P.L. (2016). New proposal of setal homology in Schizomida and revision of Surazomus (Hubbardiidae) from Ecuador. PLoS One, 11(2).
Kury, A.B., & Villarreal, M.O. (2015). The prickly blade mapped: establishing homologies and a chaetotaxy for macrosetae of penis ventral plate in Gonyleptoidea (Arachnida, Opiliones, Laniatores). Zoological Journal of the Linnean Society174(1), 1-46.
Villarreal, M.O., Kury, A.B., & Pinto-da-Rocha, R. (2015). The poorly known genus Ventrifurca Roewer, 1913 revisited (Opiliones: Cranaidae). Zoological studies54(1), 1-18
Hara, M.R., Pinto-Da-Rocha, R., & Villarreal, M.O. (2014). Revision of the cranaid genera Phalangodus, Iquitosa and Aguaytiella (Opiliones: Laniatores: Gonyleptoidea). Zootaxa, 3814(4), 567-580.
  Villarreal, M. O.; Moreno-González, J.A. & Luna, D. (In prep.) Four new species of Surazomus Reddell & Cokendolpher, 1995 (Schizomida: Hubbardiidae) from Colombia.
  Villarreal, M.O., Miranda, G.S. & Giupponi, A.P.L. (In prep) . New species of Surazomus Reddel & Cokendolpher, 1995 (Schizomida: Hubbardiidae) from Ecuador.
  Villarreal, M.O. & Rodriguez C.J. (In prep) Three new Eutimesius Roewer, 1913 (Opiliones: Stygnidae) from Colombia and Venezuelan Andes.
Villarreal, M.O. & García L.F. (2012) A new species of Piaroa Villarreal, Giupponi & Tourinho, 2008 (Schizomida: Hubbardiidae) from Colombia. TURK J ZOOL, v. 36, p. 185-189.
Moreno-Gonzalez ; Villarreal M., O. . A new genus of Hubbardiidae (Arachnida: Schizomida) from the Colombian Andes.. Zootaxa (Auckland. Print), v. 3560, p. 61-78, 2012.
Villarreal M., O. ; Kury, A.B. . Licornus Roewer, 1932: newly transferred to Ampycinae and first record of the family Gonyleptidae (Opiliones: Laniatores) from Venezuela. Zootaxa (Auckland. Print), v. 3544:, p. 71-78, 2012.
Rojas-García, A. ; VILLARREAL M., O. ; HUERTAS-VARGAS, D. ; GARCIA, L. F. (2011). Ritmos de actividad diaria del opilión Rhaucus cf. vulneratus Simon, 1879 (Opiliones: Cosmetidae). Boletín de la SEA, v. 48, p. 458-460.
VILLARREAL M., O. ; RODRIGUEZ, C. (2011). Revalidation of Santinezia albilineata Roewer, 1932 (Opiliones: Cranaidae). Journal of Threatened Taxa, v. 3, p. 2202-2206.
VILLARREAL M., O. ; Machado, G. (2011). First record of paternal care in the family Stygnidae (Opiliones: Laniatores). The Journal of Arachnology, v. 39, p. 500-502.
Armas, L.F, Villarreal-M., O. &  Víquez, C. (2010) Dos nuevas especies de Surazomus Reddell & Cokendolpher, 1995 (Schizomida: Hubbardiidae) de Costa Rica. Papéis Avulsos de Zoologia (USP.Museu de Zoologia. Impresso), v. 50, p. 579-586.
Villarreal, M., O. (2010) The first record of the genus Zomus Reddell & Cokendolpher, 1995 (Schizomida: Hubbardiidae) from Samoa. Arthropoda Selecta, v. 19, p. 81-83.
Armas, L.F.de Villarreal-Manzanilla, O. & Colmenares-García, P.A. (2009) Depredación de un isópodo (Isopoda: Oniscidea) por Prionostemma sp. (Opiliones: Sclerosomatidae). Boletín del Centro de Investigaciones Biológicas, 43(2), 305–307.

Armas, L.F. de; Villarreal-Manzanilla O. & Colmenares-G., P.A. (2009) Nuevo Rowlandius (Schizomida: Hubbardiidae) de la Sierra San Luís, Venezuela noroccidental. Papeis Avulsos de Zoologia, Sao Paulo, 49(28):361‑368.

Garcia, L.F. & Villarreal, M.O. (2009) Localidad tipo precisa de Surazomus macarenensis (Kraus, 1957) (Schizomida: Hubbardiidae). Boletín de la Sociedad Entomologica Aragonesa, 44: 434.
Pinto-da-Rocha, R. & Villarreal M.O. (2009) Cladistic analysis of the Stygninae and description of a new species of Protimesius Roewer, 1913 (Opiliones: Stygnidae). Zootaxa, 2176: 48–56.
Villarreal, M.O. & Giupponi A.P.L. (2009) Nueva especie de Mastigoproctus Pocock, 1894 (Thelyphonida, Thelyphonidae) de Venezuela noroccidental. Graellsia, Graellsia (Madrid), v. 65, p. 145-153.
Villarreal-Manzanilla, O. & Kury, A.B. (2009) A new generic homonymy in the Agoristenidae (Arachnida:Opiliones). Zootaxa, 2045, 65–68. [Issued: 18 March 2009].
Pío A. Colmenares García & Osvaldo Villarreal-Manzanilla (2008) Una nueva especie de Phrynus Lamarck, 1801 (Amblypygi: Phrynidae) de la Sierra de Perijá, Venezuela. Boletin de la Sociedad Entomologica Aragonesa, 43: 89 - 93.

Villarreal-Manzanilla, O., Giupponi, A.P.L. & Tourinho, A.L.M. (2008) New Venezuelan genus of Hubardiidae (Arachnida: Schizomida). Zootaxa 1860: 60–68.

Villarreal-Manzanilla, Osvaldo, Jesús Manzanilla P. & Frank Steines (2008) Dos casos de anurofagia por Santinezia curvipes (Roewer, 1916) (Opiliones: Cranaidae). Boletín Sociedad Entomológica Aragonesa, 42: 317–319.
Armas, Luis F. de, Villarreal-Manzanilla, Osvaldo & Víquez, Carlos (2007) Redescubrimiento de Mastigoproctus formidabilis Hirst, 1912 (Thelyphonida: Thelyphonidae) en Venezuela. Boletín Sociedad Entomológica Aragonesa, 40: 423-425.
Kury, A.B., Villarreal-M., Osvaldo & Costa, Cristiano S. (2007) Redescription of the type species of Cynorta Koch, 1839 (Arachnida,Opiliones, Cosmetidae) The Journal of Arachnology, South El Monte, 35(2): 325–333.
Villarreal-Manzanilla, Osvaldo, Carlos DoNascimiento & Rodríguez, Carlos J. (2007) Two new species of the enigmatic genus Stenophareus (Opiliones: Laniatores: Stygnidae) from the Venezuelan Guiana Shield. Zootaxa, 1471: 43–51.
Villarreal Manzanilla, Osvaldo & Rolando Teruel, 2006. Un nuevo Hansenochrus Reddell & Cokendolpher, 1995 (Schizomida: Hubbardiidae) de Venezuela noroccidental. Papéis Avulsos de Zoologia, São Paulo, 46(20):233-238.
Villarreal-Manzanilla O. & R. Pinto-da-Rocha. 2006. Five new species of Protimesius from Brazil (Opiliones: Stygnidae). Zootaxa, 1325: 219-233.
Villarreal Manzanilla Osvaldo. 2006. New and interesting record of Ethobunus meridionalis (Caporiacco, 1951) from Venezuela (Opiliones: Zalmoxidae). Revista Ibérica de Aracnología, Zaragoza, 13: 163-165. [Publication date is 30 June 2006].
Villarreal Manzanilla O. & C. Rodríguez T. 2006. Nuevos registros del género Phareus Simon, 1879 en Colombia, con la descripción de una nueva especie (Opiliones, Stygnidae). Bol Soc. Ent. Aragonesa, 38: 103-105.
Villarreal-Manzanilla, Osvaldo & Carlos DoNascimiento. 2005. Una nueva especie del género Paravima Caporiacco, 1951 (Opiliones, Laniatores, Agoristenidae) del tramo oriental de la Cordillera de La Costa, Estado Miranda, Venezuela. Memoria de la Fundación La Salle de Ciencias Naturales, 2005 ("2004"), 161-162: 101-111.
Villarreal-M Osvaldo & C. Rodríguez-Manzanilla. 2004. Descripción de una nueva especie y dos nuevos registros del género Stygnoplus (Opiliones, Stygnidae) para Venezuela. Revista Ibérica de Aracnología, Zaragoza, 10: 179-184. [Publication date is 31 December 2004].
Villarreal-M Osvaldo. 2004. Descripción de una nueva especie del género Stygnidius (Opiliones, Stygnidae) del Cerro Marahuaca, en el Amazonas Venezolano. Revista Ibérica de Aracnología, Zaragoza, 9: 15-18. [Publication date is 30 June 2004].
Villarreal-M., O. & C. Rodríguez-M., 2003. Descripción de Trinella vigirima sp. n. (Opiliones, Agoristenidae) de Venezuela. Entomotropica, 18(3): 177-182.
Villarreal O., C. Señaris & C. do Nascimiento, 2002. Contribución al conocimiento faunístico del Wei-Assipu-tepui, macizo del Roraima, con énfasis en la anurofauna y opiliofauna. Boletín de la Sociedad Venezolana de Espeleología, 36: 46-50.


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