Revision of the genera Eutrecha and Xenotrecha (Solifugae: Ammotrechidae), taxonomic notes on Ammotrechinae, and description of a remarkable new Eutrecha from Colombia Author Botero-Trujillo, Ricardo https://orcid.org/0000-0002-6199-6572 Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79 th Street, New York, NY 10024 - 5192, USA & Division Aracnologia, Museo Argentino de Ciencias Naturales " Bernardino Rivadavia " - CONICET, Avenida Angel Gallardo 470, CP: 1405 DJR, C. A. B. A., Buenos Aires, Argentina Author Martinez, Leonel Division Aracnologia, Museo Argentino de Ciencias Naturales " Bernardino Rivadavia " - CONICET, Avenida Angel Gallardo 470, CP: 1405 DJR, C. A. B. A., Buenos Aires, Argentina Author Iuri, Hernan Augusto Division Aracnologia, Museo Argentino de Ciencias Naturales " Bernardino Rivadavia " - CONICET, Avenida Angel Gallardo 470, CP: 1405 DJR, C. A. B. A., Buenos Aires, Argentina Author Ojanguren-Affilastro, Andres Alejandro Division Aracnologia, Museo Argentino de Ciencias Naturales " Bernardino Rivadavia " - CONICET, Avenida Angel Gallardo 470, CP: 1405 DJR, C. A. B. A., Buenos Aires, Argentina Author Carvalho, Leonardo Sousa https://orcid.org/0000-0003-4700-5610 Universidade Federal do Piaui, Campus Amilcar Ferreira Sobral, BR 343, km 3.5, Bairro Meladao, s / no. CEP 64800 - 000, Floriano, PI, Brazil carvalho@ufpi.edu.br text Arthropod Systematics & amp; Phylogeny 2023 2023-04-04 81 317 344 http://dx.doi.org/10.3897/asp.81.e95181 journal article http://dx.doi.org/10.3897/asp.81.e95181 1864-8312-81-317 BE57FF40714740AC8BEA1706A95DA4ED C3B28C3FAD9250BC906A4A865EAA18B4 3.1.1. Subfamily Ammotrechinae Roewer, 1934 Figs 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 Ammotrechinae Roewer, 1934: 590-591; Mello-Leitao 1938 : 22; Muma 1951 : 123; Muma 1970 : 44; Muma 1971 : 11-12; Muma 1976 : 24-25; Harvey 2003 : 200; Brookhart and Brookhart 2006 : 323. Revised diagnosis. Ammotrechinae s.str. genera feature the one characteristic that typically defines Ammotrechidae : having the flagellum of the chelicera of males shaped as an open bowl, with the opening placed prolaterally (i.e., facing the opposite chelicera) (e.g., Figs 6A , 8D , 16A ) ( Roewer 1934 ; Maury 1984 ; Bird et al. 2015 ). Ammotrechinae s.str., as defined in these lines, is presumed to be a monophyletic group of solifuges (see generic composition below) that exhibit the following combination of features (applicable to males and females unless otherwise specified). i) Cheliceral movable finger with retroventral longitudinal carina (MRVC) (Figs 2 , 3 ). ii) Movable finger prolateral (MPL) tooth present (Fig. 6B ). iii) Cheliceral fixed finger without subdistal (FSD) tooth/teeth (Figs 2 , 3 ). iv) Fixed finger of female with pronounced angular dorsal crest at level of FP-RFA tooth (Figs 3A , 9A, B , 14A, B ). v) Pedipalp femur retroventral surface with a suture-like cleavage plane that allows autotomy (Figs 17 , 18 ). vi) Legs II and III without retroventral spiniform setae on distal segment of telotarsus. Revised generic composition. Ammotrechinae s.str.: Ammotrecha Banks, 1900, Eutrecha Maury, 1982, Xenotrecha Maury, 1982. Other genera in Ammotrechinae s.l.: Ammotrechella Roewer, 1934, Ammotrechesta Roewer, 1934, Ammotrechinus Roewer, 1934, Ammotrechula Roewer, 1934, Antillotrecha Armas, 1994, Campostrecha Mello-Leitao , 1937, Chileotrecha Maury, 1987, Mummuciona Roewer, 1934, Neocleobis Roewer, 1934, and Sedna Muma, 1971. Remarks. Two monotypic genera, Mummuciona Roewer, 1934 and Sedna Muma, 1971, were listed, incorrectly, as members of Mummuciidae in Harvey's (2003) catalogue. Maury (1982) transferred Mummuciona to Ammotrechidae - which that author already considered as a family separate from Mummuciidae despite not having yet formally elevated Mummuciinae to the family rank, which he did shortly thereafter ( Maury 1984 ) - whereas the same author transferred Sedna to the same family a few years later (Maury 1987). Although both genera have since remained unassigned into Ammotrechidae , Iuri et al. (2021) recovered Sedna as belonging to an unresolved clade containing Ammotrechinae and Saronominae genera and proposed that Mummuciona could potentially belong to the same clade. In the absence of conclusive phylogenetic data on the systematic position of Mummuciona and Sedna , both genera are here included, conservatively, into Ammotrechinae s.l. The same decision is made for Chileotrecha , which Iuri et al. (2021) recovered in the same clade as Sedna .