Abstract
A new sun-spider species of the ibirapemussu species-group of the genus Gaucha is described based on males and a female collected in Southeastern Brazil. The newly described species can be readily distinguished from its congeners by the reduction of the cheliceral fixed finger, distal tooth (FD), closely positioned and smaller than the medial tooth (FM); the presence of cheliceral fixed finger profondal subproximal (PFSP) and retrofondal submedial (RFSM) teeth; and by the cheliceral movable finger, medial tooth (MM) well developed, larger than submedial tooth (MSM) and smaller than proximal tooth (MP). This is the thirteenth described species in the genus Gaucha, all known from South America.
References
Bird, T.L. & Wharton, R.A. (2015) Description of a new solifuge Melanoblossia ansie sp. n. (Solifugae, Melanoblossiidae) with notes on the setiform flagellar complex of Melanoblossiinae Roewer, 1933. African Invertebrates, 56, 515–525. https://doi.org/10.5733/afin.056.0218
Bird, T.L., Wharton, R.A. & Prendini, L. (2015) Cheliceral morphology in Solifuge (Arachnida): Primary homology, terminology, and character survey. Bulletin of the American Museum of Natural History, 2015 (394), 1–356. https://doi.org/10.1206/916.1
Botero-Trujillo, R. (2014) Redescription of the sun-spider Mummucina titschacki Roewer, 1934 (Solifugae, Mummuciidae) with notes on the taxonomy of the genus. Zootaxa, 3884 (4), 319–332. https://doi.org/10.11646/zootaxa.3884.4.2
Botero-Trujillo, R. (2016) The smallest known solifuge: Vempironiella aguilari, new genus and species of sun-spider (Solifugae: Mummuciidae) from the coastal desert of Peru . Journal of Arachnology, 44, 218–226. https://doi.org/10.1636/JoA-S-16-012
Botero-Trujillo, R., Lagos-Silnik, S. & Fernández-Campón, F. (2019a) Curanahuel aconcagua, a new genus and species of sun-spider (Solifugae: Mummuciidae) from the Cuyan High Andean biogeographic province of Argentina. Journal of Arachnology, 47, 351–359. https://doi.org/10.1636/0161-8202-47.3.351
Botero-Trujillo, R., Ott, R. & Carvalho, L.S. (2017) Systematic revision and phylogeny of the South American sun-spider genus Gaucha Mello-Leitão (Solifugae: Mummuciidae), with description of four new species and two new generic synonymies. Arthropod Systematics and Phylogeny,75, 3–44.
Botero-Trujillo, R., Ott, R., Mattoni, C.I., Nime, M.F. & Ojanguren-Affilastro, A. (2019b) Two new species of the sun-spider genus Gaucha from Argentina and Brazil (Solifugae, Mummuciidae). Zootaxa, 4551 (2), 180–194. https://doi.org/10.11646/zootaxa.4551.2.3
Brookhart, J.O. & Muma, M.H. (1981) The Pallipes species-group of Eremobates Banks (Solpugida: Arachnida) in the United States. The Florida Entomologist, 64, 283–308. https://doi.org/10.2307/3494582
Carvalho, L.S. & Botero-Trujillo, R. (2019) On the sun-spiders of the ibirapemussu species-group of the genus Gaucha Mello-Leitão, 1924 (Solifugae, Mummuciidae), with description of a new species. Zootaxa, 4700 (2), 289–298. https://doi.org/10.11646/zootaxa.4700.2.8
Carvalho, L.S., Candiani, D.F. & Bonaldo, A.B. (2010) A new species of the sun-spider genus Mummucia (Arachnida: Solifugae: Mummucidae) from Piaui northeastern Brazil. Zootaxa, 2690 (1), 19–31.
https://doi.org/10.11646/zootaxa.2690.1.2
ESRI (2013) ArcGIS Desktop: Release 10.2. Environmental Systems Research Institute, Redlands, California. [program]
Holmberg, E.L. (1876). Aracnidos Argentinos. Anales de Agricultura de la República Argentina, 4, 1–28.
Iuri, H.A., Iglesias, M.S. & Ojanguren-Affilastro, A.A. (2014) A new species of Chileotrecha Maury, 1987 (Solifugae: Ammotrechidae) from Argentina with notes on the genus. Zootaxa, 3827, 20–30. https://doi.org/10.11646/zootaxa.3827.1.2
Lewinsohn, T.M. & Prado, P.I. (2005) How Many Species Are There in Brazil? Conservation Biology, 19, 619–624. https://doi.org/10.1111/j.1523-1739.2005.00680.x
Lira, A.F. de A., Lorenzo, E.P. & DeSouza, A.M. (2021) The first record of Gaucha mauryi (Solifugae: Mummucidae) in the state of Pernambuco, Brazil, and notes on Brazilian Solifuge species distribution. Entomological News,129, 406–413. https://doi.org/10.3157/021.129.0409
Maury, E.A. (1980) Presencia de la familia Daesiidae en America del Sur con la descripcion de un nuevo genero (Solifugae). Journal of Arachnology, 8, 59–67.
Mello-Leitão, C. (1924) A new South-American solpugid. Revista Chilena de Historia Natural, 28, 140–143.
Oliveira, U., Paglia, A.P., Brescovit, A.D., de Carvalho, C.J.B., Silva, D.P., Rezende, D.T., Leite, F.S.F., Batista, J.A.N., Barbosa, J.P.P.P., Stehmann, J.R., Ascher, J.S., de Vasconcelos, M.F., De Marco, P., Löwenberg-Neto, P., Dias, P.G., Ferro, V.G. & Santos, A.J. (2016) The strong influence of collection bias on biodiversity knowledge shortfalls of Brazilian terrestrial biodiversity. Diversity and Distributions, 22, 1232–1244. https://doi.org/10.1111/ddi.12489
Oliveira, U., Soares-Filho, B.S., Paglia, A.P., Brescovit, A.D., De Carvalho, C.J.B., Silva, D.P., Rezende, D.T., Leite, F.S.F., Batista, J.A.N., Barbosa, J.P.P.P., Stehmann, J.R., Ascher, J.S., De Vasconcelos, M.F., De Marco, P., Löwenberg-Neto, P., Ferro, V.G. & Santos, A.J. (2017) Biodiversity conservation gaps in the Brazilian protected areas. Scientific Reports, 7, 1–9. https://doi.org/10.1038/s41598-017-08707-2
Oliveira, U., Soares-Filho, B.S., Santos, A.J., Paglia, A.P., Brescovit, A.D., de Carvalho, C.J.B., Silva, D.P., Rezende, D.T., Leite, F.S.F., Batista, J.A.N., Barbosa, J.P.P.P., Stehmann, J.R., Ascher, J.S., Vasconcelos, M.F., Marco, P. De, Löwenberg-Neto, P. & Ferro, V.G. (2019) Modelling highly biodiverse areas in Brazil. Scientific Reports, 9 (6355), 1–9. https://doi.org/10.1038/s41598-019-42881-9
Rocha, L.S. (2002) Solifugae. In: Adis, J. (Ed.), Amazonian Arachnida and Myriapoda. Pensoft, Moscow, pp. 439–448.
Rocha, L.S. & Cancello, E.M. (2002) South American Solifugae: new records, ccurrence in humid forest and concurrence with termites. Newsletter of the British Arachnological Society, 93, 4–5.
Roewer, C.F. (1934) Solifuga, Palpigrada. In: Bronn, H.G. (Ed.), Klassen und Ordnungen des Tierreichs. V Band: Arthropoda. IV Abteilung: Arachnoidea und kleinere ihnen nahegestellte gruppen. Akademische Verlagsgesellschaft mbh, Leipzig, pp. 481–723.
Santos, J.C., Leal, I.R., Almeida-Cortez, J.S., Fernandes, G.W. & Tabarelli, M. (2011) Caatinga: The scientific negligence experienced by a dry tropical forest. Tropical Conservation Science, 4, 276–286. https://doi.org/10.1177/194008291100400306
Shultz, J.W. (1989) Morphology of locomotor appendages in Arachnida: evolutionary trends and phylogenetic implications. Zoological Journal of the Linnean Society, 97, 1–55. https://doi.org/10.1111/j.1096-3642.1989.tb00552.x
Silva, J.M.C., Barbosa, L.C.F., Leal, I.R. & Tabarelli, M. (2017) The caatinga: understanding the challenges. In: Silva, J.M.C., Leal, I.R. & Tabarelli, M. (Eds.), Caatinga. Springer, Cham, pp. 3–19. https://doi.org/10.1007/978-3-319-68339-3_1