Taxonomic revision of the genus Mayazomus Reddell & Cokendolpher, 1995 (Schizomida: Hubbardiidae), with description of five new species from Chiapas, Mexico Author Monjaraz-Ruedas, Rodrigo Author Francke, Oscar F. text Zootaxa 2015 3915 4 451 490 journal article 10.11646/zootaxa.3915.4.1 01f159e7-e94a-4062-bf53-ea130633c06e 1175-5326 241155 7BC2D981-BCBC-448B-8F85-4D1DD1097BDD Mayazomus kaamuul , new species Figs. 65−78 , 112 , Table 1 Type material. MEXICO : Chiapas : Heteromorphic male holotype (CNAN-T0860) [ 23 July 2013 , O. Francke, A. Valdez, C. Santibáñez, J. Mendoza, K. Zárate, R. Monjaraz] from outside of Cueva de las Abejas ( 16.84874ºN , 93.2433ºW , 1190 masl), Municipio San Fernando. Paratypes : 2 females (CNAN-T0861), same data as holotype ; 1 female (CNAN-T0862) [ 19 June 2011 , O. Francke, A. Valdez, C. Santibáñez, J. Cruz, G. Contreras, K. Zarate, R. Monjaraz], same locality data as holotype ; 1 female (CNAN-T0863) [ 15 June 2011 , O. Francke, A. Valdez, C. Santibáñez, J. Cruz, G. Contreras, K. Zarate, R. Monjaraz] from outside Cueva de Paso Burro, ( 16.82883ºN , 93.2433ºW , 767 m . a.s.l.), Municipio Berriozabal. Etymology. The specific name is a noun formed by the combination of two Mayan words: “Kaa”, which means two or double, and “Muul” which means mound or swelling; referring to the two swellings present in the dorsal surface of the male flagellum, which is a diagnostic character for the species. Diagnosis. Males can be distinguished by the pedipalp trochanter having a small trapezoidal apical process; pedipalp femur with spiniform setiferous tubercles Fv1 and Fv2 reduced and rounded ( Fig. 77 ), mesal surface with a small blunt apophysis (FAP); pedipalp tibia with a weak, triangular mesal apophysis, placed medially (TMA); and by the presence of one pair of circular dorso-submedian swellings and a posterior depression in the dorsal surface of the flagellum ( Figs. 71–73 ) Females can by distinguished by the spermathecae having lateral lobes acuminate; median lobes long and slender, inverse J-shaped, almost three times longer than lateral lobes ( Fig. 70 ). Mayazomus kaamuul resembles Mayazomus hoffmannae having a trapezoidal apical process, a blunt apophysis and median lobes about three times longer than lateral lobes, but they differ in pedipalp size, M . hoffmannae is proportionately longer (3.61 times longer than propeltidium length) than M. kaamuul (2.82 times longer than propeltidium length). The male flagellum of M. kaamuul presents a pair of rounded dorso-submedian swellings that are diagnostic and unique in the genus. The tibial apophysis is shorter and less pronounced in M. kaamuul than in M . hoffmannae ( Reddell & Cokendolpher, 1986: figs. 6–10 ). Spermathecae of M. hoffmanae present small and slender lateral lobes whereas M. kaamuul has wide lateral lobes. Description. Heteromorphic male ( holotype ): Dark brownish. Prosoma: Propeltidium with two setae on anterior process and two pairs of dorsal setae; ocular spots asymmetrical and irregular. Mesopeltidial plates 0.26 wide, 0.05 long; gap between the plates 0.26. Metapeltidium 0.40 long, 0.67 wide. Anterior sternum with 10 setae, plus two sternopophysial setae; posterior sternum with six setae. Chelicerae ( Figs. 67–69 ): Movable finger: Serrula with 20 teeth. Fixed finger with 5 smaller teeth between 2 primary teeth. Setation: Setal group formula: 1:3, 2:6, 3:4, 4:2, 5:9, 6:1. G1 (setae group 1) with three spatulate setae, covered with a few spiniform spicules ( Fig. 69 ) starting at middle of the shaft; G2 composed of six feathered setae, subequal in length, and shorter than movable finger length; G3 with four setae, feathered apically and smooth basally, two shorter, about 2/3 of long setae; G4 consisting of two setae, smooth, short and thick, spine-like; G5 with nine similar sized setae, feathered apically and longer than fixed finger; G6 with one smooth seta, 1/2 of movable finger length. Pedipalps ( Figs. 77, 78 ): Robust; 2.82 times longer than propeltidium length. Trochanter long, 2.6 times longer than high; apical process triangular, greater than 45º; with a row of 10 setae on ventral margin; mesal surface with a row of three setae near ventral margin, plus two setae near dorsal margin; with a small median mesal spur. Femur wide, 1.66 times longer than high, elongated distally; distal margin straight, ventral margin flattened; distal margin of ectal surface with spiniform setiferous tubercles Fv1 and Fv2 close to each other, the tubercle is globular and small; mesal surface with two ventral plus two dorsal spiniform setae (2+2); distal margin of the mesal surface with a small, blunt apophysis like a spine ( Fig. 78 ) (FAP). Patella strongly curved, inverse U-shaped; flattened ventrally and apically widened; with scattered setae and without armature. Tibia elongated, with scattered setae; with one apophysis on ventromesal surface opposable to tarsus, situated medially (TMA). Tarsus short, 2.86 times longer than wide. Claw about 1/2 as long as dorsal length of tarsus; spurs asymmetrical, 0.06 long. Legs: Leg I, basitarsal-telotarsal proportions: 20: 3: 3: 4: 4: 4: 10. Femur IV 2.46 times longer than high. Opisthosoma: Tergite I with two pairs microsetae anteriorly plus one pair macrosetae 2+1; tergite II with three pair microsetae anteriorly and two pairs macrosetae 3+2; tergites III–VII with one pair dorsal setae each; tergites VIII–IX with one pair dorsal and one pair lateral setae; segments X–XI telescoped with one pair lateral setae and five ventral setae; segment XII with one dorsal, two lateral and four ventral pairs of setae, without posterodorsal process. Sternites with scattered setae; genital aperture with many microsetae. FIGURES 65, 66. Mayazomus kaamuul new species . Male holotype. Habitus: 65. Dorsal view. Female paratype. Habitus: 66. Dorsal view. Scale bar = 2 mm. FIGURES 67–70. Mayazomus kaamuul new species . Male. Chelicera (67–69): 67, mesal view. 68, fixed finger. 69, movable finger. Female. Spermathecae: 70, dorsal view. Scale bar (Fig. 70) = 0.05 mm. Flagellum ( Figs. 71–73 ): dorsoventrally flattened, cordate in shape; 1.35 times longer than wide, 2.4 times longer than pedicel length; with one dorso-posterior depression, and a pair of dorso-submedian swellings. Setation: Dm1 situated over the bulb base; Dm4 situated distally; Dl1 reduced, 1/3 length of Vl1 ; Dl1 positioned at same level as Vl1 ; Dl3 at same level as Vl2 ; pair Vm2 present; seta Vm1 at same level as Vm2 pair; Vm5 posterior to Vl1 . With one pair of antero-dorsal microsetae between Dm1 and Dl1 nearest to Dl1 ; one pair of antero-lateral microsetae on flagellar pedicel, and one pair of irregular clumps between Vl1 and Vl2 , each composed of 6 microsetae. Female ( paratype ): Similar to the heteromorphic male, except in pedipalp development, 1.93 times longer than propeltidium length, the female pedipalp does not have armature or any modification on the segments, with a slight curvature in the patella; females present the same femoral apical process shape than males and the same position of the spinose setae on mesodistal margin. Other differences: body longer and more robust than male ( Table 1 ); setation as on male. Flagellum ( Figs. 74–76 ) with three annuli. Setation: seta Dl1 not reduced and at same level as Vl1 ; Dl3 posterior to Vl2 ; seta Vm1 at same level as Vm2; Vm2 reduced. Segment III with one lateral pair of microsetae near to Vm4 . Segment IV with one pair of distolateral microsetae near to Vl2. Spermathecae ( Fig. 70 ) without bulbs, with 4 lobes; median pair curved, inverse J-shaped and longer than lateral pair; lateral pair curved on inner face and flat on external face ending in a pointed tip and wider than median pair; both pairs with duct openings. Gonopod long and thin; chitinized arc U- shaped, widened at the base in the posterior branch, with irregular margins, lateral tip not sclerotized. Chelicera: serrula with 17 teeth. Setal group formula 1:3, 2:6, 3:6, 4:2, 5:8, 6:1. Variation. Homeomorphic male unknown. Female total length 3.88–4.88 (n=4). Cheliceral movable finger with 17 to 20 small teeth on serrula (mode= 20). Fixed finger of chelicerae with 4 to 5 (mode= 5) smaller teeth between 2 primary teeth. Variation in setal groups: G3 (4–6) and G5 (8–9). Distribution. This species is distributed in the medium-height rainforest located NW of Tuxtla Gutierrez, Chiapas, in the municipalities of San Fernando and Berriozabal ( Fig. 112 ). The specimens were collected in perturbed areas, under rocks and rotten logs; the only male known was found near a cornfield in a fairly dry zone.