Mayazomus Reddell and Cokendolpher, 1995

Monjaraz-Ruedas, Rodrigo & Francke, Oscar F., 2015, Taxonomic revision of the genus Mayazomus Reddell & Cokendolpher, 1995 (Schizomida: Hubbardiidae), with description of five new species from Chiapas, Mexico, Zootaxa 3915 (4), pp. 451-490 : 454-456

Genus Mayazomus Reddell and Cokendolpher, 1995

Type species: Schizomus infernalis Rowland, 1975 , by original designation.

Included taxa. Mayazomus aluxe new species, Mayazomus hoffmannae ( Reddell and Cokendolpher, 1986) , Mayazomus infernalis ( Rowland, 1975) , Mayazomus kaamuul new species, Mayazomus loobil new species, Mayazomus tzotzil new species and Mayazomus yaax new species.

Emended diagnosis. Pedipalps sexually dimorphic; male pedipalps dimorphic, with trochanter strongly produced ( Figs. 6, 7 ) and broadly connected to femur, trochanter with mesal spur; femur with setae Fv1 and Fv2 on ectal face modified as spiniform setiferous tubercle ( Fig. 4, 5 ), with an apophysis (FAP) on mesal surface located on the distal margin ( Fig. 5 ); patella strongly curved, widened apically, and ventrally flattened; tibia with a mesal apophysis opposable to tarsus (TMA); movable cheliceral jaw without accessory tooth or lamella, guard tooth present at base of serrula; anterior process of propeltidium pointed downward, with two setae (one behind the other); corneate eyes absent; metapeltidium entire; anterodorsal margin of femur IV produced at about a 90° angle; abdominal tergite II with at least four posterior setae (except for Mayazomus tzotzil that presents only two setae); body without clavate setae; male abdomen not elongated; male without posterodorsal abdominal process on segment XII; male flagellum dorsoventrally flattened, spade or oval shaped without significant dorsal relief; female flagellum with three annuli ( Figs. 1–3 ); spermathecae with two pairs of lobes subequal in length, with the apex pointing outwards, without distinct bulbs, with a short wide gonopod and a chitinized arch with wide posterior branch, and without anterior branch ( Fig. 13 ). The genus Mayazomus shares the presence of three annuli on female flagellum with the genera Hansenochrus, Calima Moreno-Gonzalez & Villareal, 2012 , Piaroa and Rowlandius , but differs from Piaroa and Calima in the number of spermathecal lobes, Mayazomus presents two pairs of lobes whereas Calima and Piaroa present one pair; also Calima lacks of chitinized arch and Piaroa has a lanceolate flagellum. Mayazomus also differs from Hansenochrus and Rowlanidus in females having spermathecal lobes without evident bulbs and males without posterodorsal process on segment XII. Mayazomus presents more than two setae on terguite II, whereas Rowlanidus and Hansenochrus present only two setae. The genus Antillostenochrus Armas &Teruel, 2002 shares with Mayazomus the presence of more than two setae on terguite II, however the genus Antillostenohrus presents two annuli on female flagellum.

Distribution. MEXICO: Chiapas and Tabasco ( Fig. 112 ).

Natural history. The genus Mayazomus can be found in tropical zones below 1500 m of elevation, primarily in rain forest and semi-deciduous forest. The species of Mayazomus collected by us were found among fallen logs, under rocks or walking in leaf-litter. A peculiar characteristic of those specimens was that almost all the species (except M. aluxe new species) were collected in highly human-disturbed areas, like near cornfields or outside of caves with garbage. The abundance of specimens depends on each species, it is generally difficult to collect large series of schizomids, and it is common to find only females. For the genus Mayazomus the rainy season, between July and September, is the best time to collect adult males and females. Specimens of the genus Mayazomus were found in sympatry with other species of schizomids (e.g. Stenochrus portoricensis ).

Figures

FIGURE 112. Distribution map of the known species of the genus Mayazomus, showing the type localities of the five new species: M. tzotzil, M. aluxe, M. kaamuul, M. yaax and M. loobil

FIGURES 1 – 7. Nomenclature diagrams. 1 – 5, 7: Mayazomus infernalis, 1 – 3, female flagellum: 1, dorsal view, 2, ventral view, 3 lateral view; 4, 5, heteromorphic male pedipalp: 4, ectal view, 5, mesal view; 7, 6, pedipalp trochanter apical process, ectal view. 6: Mayazomus hoffmannae, pedipalp trochanter apical process. Abreviations: Dm = dorsal medial, Dl = dorsal lateral, Vm = ventral medial, Vl = ventral lateral, Fv = femur ventral, Fe = femur ectal, TMA = tibial mesal apophysis, FAP = femoral apophysis, AP = apical process. Scale bars Fig. 1 – 3 = 0.2 mm, Fig. 4 – 7 = 0.5 mm.

FIGURES 10 – 13. Mayazomus infernalis. Male. Chelicera (10 – 12): 10, mesal view. 11, fixed finger. 12, movable finger. Female. Spermathecae: 13, dorsal view. Scale bar (Fig. 13) = 0.05 mm.