2014. The Journal ofArachnology 42:220-232 A new genus and a new species of scorpion (Scorpiones: Buthidae) from southeastern Mexico Oscar F. Francke', Rolando Teruel- and Carlos Eduardo Santibanez-L6pez‘: ’Coleccion Nacional de Aracnidos, Departamento de Zoologia, Instituto de Biologia, Universidad Nacional Autonoma de Mexico, Apto. Postal 70-153, C. P. 04510, Mexico, D. F., Mexico. E-mail: [email protected]; -Centro Oriental de Ecosistemas y Biodiversidad (BIOECO), Museo de Historia Natural “Tomas Romay”; Jose A. Saco # 601, esquina a Barnada, Santiago de Cuba 90100, Cuba Abstract. Chanekefogoso gen. nov. et sp. nov., aredescribed based on specimens collected nearthecoast in southeastern Guerrero, Mexico. The genus ischaracterized by thepeculiar rhomboida! shapeofthe subaculeartubercle, and thelack of at least onetrichobothrium on the femur, patella and chela ofthe pedipalp, which make it thesecond known buthid genus with decreasingneobothriotaxyon thosethreepedipalpal segments, togetherwith AlayotityusArmas 1973. Tityopsisciliciae Armas & Martin-Frias 1998, from Oaxaca, Mexico, is transferred to the newgenus, resulting in Chanekealiciae(Armas& Martin-Frias 1998), comb. nov. A cladistic analysis including all other New World “microbuthids” with decreasing neobothriotaxy, with 30 morphological characters, indicates that Chaneke is monophyletic, clearly distinct from Alayotityus Armas 1973 (from eastern Cuba) and Tityopsis Armas 1974 (from western Cuba). Keywords: Decreasing neobothriotaxy, femur, patella, chela The scorpion family Buthidae C. L. Koch 1837 contains History, New York, USA (AMNH); Centro Oriental de approximately90 genera (Ove-Rein 2014), approximately two- Ecosistemas y Biodiversidad, Santiago de Cuba, Cuba thirds of which have the trichobothrial pattern on the (BIOECO); Coleccion Nacional de Aracnidos, Univ. Nacional (3 pedipalp femur, and a third ofwhich have the a trichobothrial Autonoma de Mexico, Mexico, D. F. (CNAN); Laboratorio pattern (Vachon 1975). In the New World, there are 1 1 buthid de Entoniologia, Instituto de Diagnostico y Referenda genera represented, one with the P pattern and the remaining Epidemiologicos, Secretaria de Salud, Mexico, D. F (IN- 10 with the a pattern. Six of those genera are orthobothrio- DRE); private collection Rolando O. Teruel, Cuba (ROT). taxic: femur with 11 trichobothria (=t), patella with 13 t, Specimens examined are listed in Appendix 1, including the chela with 15 x; and four genera have decreasing neobothrio- first known male of T aliciae. Nomenclature and mensuration taxy =less than the “full” compliment noted above) on some for the most part follow Stahnke (1970), with the following ( or all oftheir species. Alayotityus Armas 1973 lacks femoral x exceptions: metasomal carinal terminology after Francke and patellar x r/-.; Mesotityus Gonzalez-Sponga 1981 lacks (1977), carinal terminology of pedipalp femur and patella patellar x ch and chela x Eby Microtityus Kjellesvig-Waering after Acosta et al. (2008) and trichobothrial terminology after 1966 has variable femoral and chelal trichobothrial numbers, Vachon (1974, 1975). Observations, measurements and but the patella is always orthobothriotaxic (x r/? present); drawings were made using a Nikon SMZ800 stereomicroscope Zahiiis Thorell 1893 lacks femoral x d? and chela x esb, but its fitted with lOX ocular micrometer and camera lucida; three species have patellar x dj present, although reduced in photographs were made using a Nikon Coolpix SIO adapted size =petite), and chela x Ebj present. to the same microscope. ( — The genus Tityopsis Armas 1974 has two species from Taxon sampling. The cladistic analysis presented is based western Cuba that are orthobothriotaxic, and a Mexican on 25 temiinal taxa (Appendix 1). Trees were rooted using the species that, although it was originally described as being out-group method (Watrous &. Wheeler 1981; Farris 1982; orthobothriotaxic (Armas & Martin-Frias 1998), was recently Nixon&Carpenter 1993).Thein-groupincludesallNewWorld redescribed and shown to be neobothriotaxic (Vidal-Acosta & genera of the family Buthidae with non-imbricated rows of Francke 2009). Another neobothriotaxic species was recently denticles on the pedipalp chela fingers and which lack collected in the state ofGuerrero, Mexico (Figs. 1, 2), which is supernumerary denticles along those rows. Three taxa which undoubtedly congeneric with Tityopsis aliciae Armas & have supernumerary denticles are used as out-groups: Rhopa- Martin-Frias 1998, from the state of Oaxaca (Fig. 3); these liinis jimceus (Herbst 1880); Centruroides exilicauda (Wood two Mexican species differ from Tityopsis in being neobo- 1863), type species of the genus; and Centruroides gracilis thriotaxic. The objectives of this contribution are: (a) to (Latreille 1804), a rather divergent taxon from the type species analyze the phylogenetic relationships ofthe two neobothrio- of the genus. The tree was rooted with Ananteris platnicki taxic Mexican species with other New World buthids which Lourenpo 1993,which istheNewWorldgenusofbuthidswitha have an a trichobothrial pattern on the femur, (b) to describe a femoral P trichobothri—al pattern and thus distantly related. new genus for those two Mexican species, and (c) to describe Character matrix. Character data were edited using the new species from Guerrero. WinClada, version 1.00.08 (Nixon 2002). Thecharactermatrix METHODS (Appendix 2) comprises 30 characters, eight coded into multistates and 22 coded into binary states. All characters — Specimens. The specimens used in this study are lodged (Appendix 3) are informative and are included in all the in the following institutions: American Museum of Natural analyses and statistics. Multistate characters were treated as 220 FRANCKE ET AL.—NEW GENUS OF BUTHIDAE FROM MEXICO 221 — Figure 1. Habitat at type locality of Cliaiiekefogoso gen. nov. et — sp. nov. Figure 2. Live habitus of Clianekefogo.so gen. nov. et sp. nov.. dorsal view, paratype (CNAN). = unordered/noii-additive (Fitch 1971), defended by invoking the principle of indifference, which asserts that if there is Bremer support (Bremer 1994), searching suboptimal trees up no apparent reason for considering one event to be more to six steps longer, retaining 1000 trees at each iteration. A probable than its alternatives, then all should be considered preferred hypothesis was selected among the alternative equiprobable (Wilki—nson 1992). topologies recovered by the analysis with equal weighting. Cladistic analyses. Analyses were conducted with parsimo- RESULTS ny and equal weighting or implied weighting with six values of = — the concavity constant (k) 1, 3, 10, 30, 60 and 100, to assess Cladistic analyses. The analysis with equal weighting the effect ofweighting against homoplasious characters (as in produced two most parsimonious trees (strict consensus tree Prendinietal. 2010). Allanalyseswereconducted withTNTver shown in Fig. 4, Table 2). The monophyly of Chaneke gen. 1.1 (Goloboffetal.2008), usingadrivensearchcombiningthree nov. was recovered by high jackknife and Bremer support of the new technology algorithms (excluding ratchet) using a values, and it was placed as sister group of the genus script filemodified from Dimitrovet al. (2013) and Santibanez- Alayotityus. Chanekegen. nov. was supported by the following Lopez et al. (in press): hold 90000; rseedl; xm: noverb nokeep: characters: (1) the lateral ocelli small and hidden from dorsal rat: it0up4down4an0man36give99ecpia; dri: it 10fit1.00rfi view by a crest (char. 2); (2) carapace without keels (char. 4); 0.20ant0man36give 99xfa3.00 ecjiia: sect:slack20: sec: mins (3) one tergal carinae (char. 5); (4) male genital papillae 45maxs45self43 incr 75minf10god75 drift 6glob 5 dglob 10 without a distinct, fleshy point (char. 7); (5) subaculear rou 3 xss 10- 14+2 noxev noeq; tf: roii 5 minf3 best ke nochoo tubercle trapezoidal, with two granules (char. 18); (6) males swap: xm : level 10 nochk rep 50fn.se3 dri 10 rss c.ss no.wssmult with basal lobe on movable finger (char. 20); (7) femoral i i3 nodump conse 5 conf75 nogive notarg iipda aiitoc 3 xmix; xm; petite (char. 25) and (8) by theabsence ofchela x Eb^ (char. 27; xmult:;. The relative support for each node was calculated in see figure 11). Genus Tityopsis was recovered monophyletic TNT using 1000 Jackknife pseudoreplicates (for equal weight- with high jackknife and Bremer support values, and it was ing) and symmetric resampling (for implied weighting) with placed as sister of the clade formed by genera Zabins, heuristicsearches,consistingoften randomaddition sequences, Microtityns, Chaneke and Alayotityus (see Fig. 4). followed by ten iterations of tree bisection-reconnection, The analyses with impliedweighting under fourvalues ofthe retaining one tree at each iteration (Dimitrov et al. 2013), and concavityconstant(k = 10, 30, 60and 100) recovered twotrees. — — THE JOURNAL OF ARACHNOLOGY — Figure 3. Map ofOaxaca and Guerrero area plotting known locality records for the two species ofCluineke gen. nov.: Chanekefogoso, sp. nov. (circle), Chaneke aliciae (Armas & Martin-Frias), comb. nov. (square). with thesame topologiesas in theanalysiswithequal weighting preferred tree is the strict consensus from the analyses without = (Table 2). However, analyses with implied weighting undertwo weighting and those recovered with concavity values ofk 10, values ofthe concavity constant (A' = 1 and 3) recovered three 30, 60 and 100 (Fig. 4), which place Chaneke as sister group of most parsimonious trees (strict consensus shown in Fig. 5; Alayotityus. These two genera share: (1) males with whitish Table 2). The monophyly of Chaneke gen. nov. was recovered patch onsterniteIII (char. 10);(2) femaleswithwhitishpatchon with high jackknife and Bremer support values, and it was sternite III (char. 14); (3) femoral t (3 petite (char. 24); and (4) placed asa sistergroupofthecladeformed bygenera Tityopsis, patella i d? absent (char. 26). However, theposition ofChaneke Microtityus, Zahhis and Alayotityus as follows: (Chaneke gen. gen. nov. within the family remains unresolved pending a nov. (Tityopsis (Microtityus (Zahius + Alayotityus)))). Under further study with the inclusion ofmore genera ofbuthids. those two analyses (k - 1 and 3), Chaneke gen. nov. was SYSTEMATICS supported by the followingcharacters (1) the trapezoidal shape of the carapace (char. 0); (2) the lateral ocelli small, dorsally Family Buthidae C.L. Koch 1837 covered by a crest, visible in frontal aspect (char. 2); (3) Genus Chaneke, gen. nov. cwairtahpoautceawidtishtoiuntct,kefellessh(ychpaori.nt4);(ch(a4r).m7a)l;e(5g-e6n)itamlalpeaspilalnade TitAycoopssitsa (&inFrpaarntc):keA2r0m09a:s33&8. Martin-Frias 1998:45; Vidal- femaleswithawhitish patchonsternite(chars. 10; 14); (7)males with basal lobe on movable finger (char. 20). Type species. Chaneke fogoso. sp. nov. None ofthese analyses recovered Chaneke gen. nov. as sister Other included species. Chaneke aliciae (Armas & Martin- group of Tityopsis, and the creation of this new genus, along Frias, 1998), c—omb. nov. with the transfer of Tityopsis aliciae =Chaneke aliciae, new Etymology. “Chanekes” are legendary creatures in Mex- ( combination) to the new genus, are well supported. The ican folklore, dating to Aztec times. They are conceived as FRANCKE ET AL.—NEW GENUS OF BUTHIDAE FROM MEXICO 223 — Figure 4. Strict consensus tree from two equally parsimonious trees (length, 69; Cl, 0.652; RI, 0.878; Fit, 24.55) obtained by the analysis of 30morphologicalcharactersfor25 speciesin 11 buthidscorpiongenera, withequalweighting, andwithweightingconcavityvaluesofk= 10, 30, 60 and 100. Unambiguous morphological synapomorphies optimized on branches: black squares indicate synapomorphies, white squares indicate homoplasies; numbersabove squares indicatecharacters, numbers below indicate states (seeAppendix 3). Jackknife valuesgreater than 50% indicated above branches. Bremer support values indicated below branches. small, sprite-like beings, elemental forces and guardians of A ot: pedipalp femur lacking x rA, patella lacking x ch, chela nature. It is used as a noun in apposition, and is considered lacking x Ebs- The eight known species of Alayotityus lack masculine in gender. femoral x d2 and patellar x d2, but have chelal x Ebs\ the three — Diagnosis. Rela—tively small-sized buthid scorpions (adults known species ofZabius lack femoral x d2, but have patellar x approx. 2 cm long Table 1) with decreasing neobothriotaxy r/2 and chelal x Eby, the two known species of Tityopsis are 224 THE JOURNAL OF ARACHNOLOGY — Ananteris platnicki “ Tityus bahiensis — Centruroides exilicauda ^ 18 1921 1924— Centruroides gracilis 1 1 1 1 18 Rhopalurusjunceus — 3 0 Tityus columbianus — 1315 Tityus clathratus 11 . Mesotityus vondangeli ' — 99 0 2 4 7 101420 I Chaneke aliciae 28 Chaneke fogoso Tityopsis inaequalis Tityopsis inexpectata Microtityus (M.) rickyi Microtityus (P.)jaumei Zabius birabeni Zabius gaucho Zabius fuscus Alayotityus delacruzi Alayotityus granma 9S Alayotityusjuraguaensis Z “Q10H12H13O14O24O” 12 2 10 0 Alayotityus sierramaestrae 0.50 Alayotityus feti 28 Alayotityus lapidicola 0 Alayotityus nanus Alayotityus pallidus — Figure 5. Strict consensus tree from three most parsimonious trees (length, 71; Cl, 0.634; RI, 0.867; Fit, 24.35; Adjusted Homoplasy, 5.65) obtained bytheanalysisof30morphologicalcharactersfor25 speciesin 11 buthidscorpiongenera,withweightingconcavityvaluesofL = 1 and 3. Unambiguous morphological synapomorphies optimized on branches: black squares indicate synapomorphies, white squares indicate homoplasies; numbers above squares indicate characters, numbers below indicate states (see Appendix 3). Jackknife values greater than 50% indicated above branches. Bremer support values indicated below branches. orthobothriotaxic. Tergites with a single, median longitudinal rhomboid in lateral view, considerably deeper than wide; Carina; whereas Alayotityus and Zabius have three carinae, Alayotityus, Tityopsis and Zabius all have a subaculear Tityopsis only one, and Microtityus three or five. Metasomal tubercle which may be obsolete to moderately developed, segment V without lateral carinae; Zabiusand Microtityusalso but is always blunt conical. Fixed finger ofthe pedipalp chela lack such carinae, Alayotityus and Tityopsis always have well with 9-10 slightly imbricated rows of denticles; Alayotityus defined lateral carinae. Subaculear tubercle very large and also has 9-10, Zabius and Tityopsis have 1 1-12. Dentition on — — FRANCKE ET AL.—NEW GENUS OF BUTHIDAE FROM MEXICO 225 Table 1.—Measurements in mm of Chaneke fogoso sp. nov. L = Table 2.—Tree statistics for phylogenetic analysis of25 species in length, W = width. 10 New World buthid scorpion genera. Length, consistency index (Cl), retention index (RI), Fit and adjusted homoplasy (AH) ofmost Holotype Paratype Paratype Paratype parsimonious trees (MPTs) obtained by the analyses of the morphological under equal weighting (EW) and implied weighting male male female female (IW), with six concavity values (k). Total L 19.7 20.6 21.3 20.2 Carapace L 2.8 2.9 3 2.9 MP L Cl RI FIT AH W 2.4 2.3 2.5 2.4 EW 2 69 0.652 0.878 24.55 Mesosoma L 6.5 6.7 7.3 7.3 IW II Oo 2 69 0.652 0.878 29.76 0.24 Metasoma L 10.4 II 11 10 IW IISOO 2 69 0.652 0.878 29.61 0.39 I WL 1.5 1.6 1.6 1.5 IW II o 2 69 0.652 0.878 29.24 0.76 1.7 1.7 1.7 1.6 IW k=10 2 69 0.652 0.878 27.91 2.09 II LW 1.9 2 2 1.8 IW k=3 3 70 0.643 0.872 24.6 5.4 1.6 1.5 1.5 1.4 IW k=l 3 70 0.643 0.872 24.6 5.4 III L 2 2.1 2.2 2 W 1.5 1.5 1.5 1.3 IV L 2.3 2.4 2.4 2.2 — W 1.5 1.5 1.4 1.3 Etymology. The specific name is a noun in apposition, V L 2.7 2.9 2.8 2.5 “fogoso” in Spanish means “fiery”, “feisty” or “lit-on-fire”, W 1.5 1.5 1.4 1.3 befitting the generic name; in addition, it alludes to the type Telson WL 2.4 2.5 2.6 2.3 locality. 1 1.1 1.1 1.1 Description. Holotype male (Figs. 6A, B): Coloration: Pedipalp L 9.4 9.7 10.3 9.7 Base color light yellow (straw-colored). Prosoma: carapace Femur L 2.3 2.4 2.5 2.4 W with dense, variegated fuscosity (Figs. 6A, C); venter pale 0.8 0.9 0.9 0.9 Patella L 2.7 2.7 3 2.8 yellow (Figs. 6B, D). Mesosoma:—tergites I-VI with two W 1.1 1.2 1.2 1.2 complete, transverse fuscous bands one on all ofpre-tergite, Chela L 4.1 4.6 4.8 4.5 the other on distal one-half of post-tergite; tergite VII with W 1.5 1.6 1.3 1.3 pre-tergite infuscate, and post-tergite with middle, posterior and lateral areas infuscate; ventrally pale yellow. Metasomal segments I-IV faintly, uniformly infuscate on ventromedian, posterior one-halves of ventrolateral and lateral inframedian, the fingers of the pedipalp chela without supernumerary and distally on lateral supramedian intercarinal spaces; denticles flanking the primary rows (Figs. 9B, C). segment V and telson straw colored. Chelicerae not infuscate. — Distribution. Known only from the Mexican states of Pedipalps with diffuse, uniform fuscosity, dorsally on tro- Guerrero and Oaxaca, along the southern Pacific Coast chanter, femur and patella; fingers on chela pale reddish (Fig. 3). brown, feebly infuscate. Legs infuscate on prolateral regions. Carapace: Coarsely,denselygranulosethroughout (Fig. 8A). Chanekefogoso, sp. nov. Anteriormargin bilobed, with shallow median notch; with four Figures 1-6, 8-11 Table 1 short, blunt-tipped setae. Three subequal ocelli on each side. — Type data. MEXICO: Guerrero: Municipio de Copala: Median eyes slightly anterior to one-half the carapace length. Holotype adult S, Microondas Fogos (approx. 15 km ESE Two moderately strong, longitudinal, submedian carinae on Copala), 16° 33.992'N, 98° 53.301'W, 103 m, 31 Aug 2008, posterior one-fifth. Ventrally with numerous reddish setae of U.V. detection, O.F. Francke, H. Montano, C. Santibahez & various sizes, some pointed, some blunt. A. Valdez (CNAN T-0630). Paratypes: 19 adult <3, 1 subadult Mesosoma: Tergites with pre-tergite densely, minutely 3, 3 adult ?, 3 subadult ?, 2juveniles, same data as holotype (1 granulose; anterior one-halfofpost-tergite sparsely granulose, 3, 1 $ each at AMNH and BIOECO; remainder at CNAN T- shiny; posterior one-half densely, coarsely granulose, matte. 0631); 1 adult 3 (U.V.), 1 adult ? (sifting leaf litter), same One coarsely granulose median carinae present on distal one- locality, 6-7 July 2008, O.F. Francke, C. Santibanez & A. halfofpost-tergites I-VI. Tergite VII paramedian and lateral Quijano (CNAN T-0632); 1 subadult 3 (U.V.), same locality, carinae well-developed, coarsely granulose. Sternum subpen- 26 June 2007, O.F. Francke, L. Escalante, J. Ballesteros & H. tagonal (Figs. 6B, D); with deep indentation posteromedially; Montano (CNAN T-0633). three pairs of setae. Genital opercula completely separated, Diagnosis. Chaneke fogoso has 10 primary rows of with five and six setae respectively; genital papillae without denticles on both fixed and movable fingers of the pedipalp sharp, pointed end. Pectinal basal piece wider than long, with chela, whereas Ch. aliciae has only nine. Pectinal tooth count shallow anteromedian notch; posterior margin straight on males 9-11 (mode = 10), on females 8-9 (tied); C/;. fogoso (Fig. 8B). Pectinal tooth count 9-10. Sternites moderately lacks T Esh on the manus and x esb on the fixed finger of the granulose, with scattered reddish setae throughout; stigmata pedipalpchela, whereas Ch. aliciaehas xEsh and xesb present. small, oval-elongate. Sternite III with two anterolateral In addition, Ch. fogoso is in general smaller and has a less depressions underneath the pectines (where these structures robust metasoma than Ch. aliciae (Figs. 6, 7), but also presumably fit when the animal is at rest). Sternite V with a possesses the smooth, whitish patch of sternite V remarkably conspicuous, circular, white, shiny patch medially along larger and bulkier in adults ofboth sexes. posterior margin (Fig. 6B). Sternite VII submedian carinae 226 THE JOURNAL OF ARACHNOLOGY — Figure 6. Chanekefogoso gen. nov. et sp. nov., habitus, dorsal aspect (A, C) and ventral aspect (B, D). A, B. Holotype S (CNAN); C, D. Paratype ? (CNAN). Scale bar = 5 mm. FRANCKE ET AL.—NEW GENUS OF BUTHIDAE FROM MEXICO 227 — Figure 7. Chaneke aliciae (Armas & Mardn-Frias 1998), comb, nov., habitus, dorsal aspect (A, C) and ventral aspect (B, D). A, B. <3 (CNAN); C, D. $ (CNAN). Scale bar = 5 mm. granulose, well-defined and reaching posterior margin; lateral absent; intercarinal spaces densely, coarsely granulose. Telson carinae barely discernible as short row of five granules globose; ventrally weakly to vestigially granulose; subaculear submedially, absent on basal and distal thirds. tubercle flat, crest-like, its width same as that of base of Metasoma; Segments I-FV with dorsolateral, lateral supra- aculeus, ending in a small finger-like projection that points median, ventrolateral and ventral submedian carinae strong, towards middle ofaculeus (Fig. 9A). crenulate; lateral inframedian carinae complete, crenulate Chelicera: Fixed finger with three dorsal teeth; on right side on I-II, absent on III-IV; intercarinal spaces moderately basal tooth is a bicusp, on left side a sharp monocusp; granulose. Segment V (Fig. 9A) dorsolateral, ventrolateral ventrally with a single small tooth at level of middle dorsal and ventromedian carinae strong, granulose; lateral carinae tooth. Movable finger with distal tines subequal; dorsally with 1 228 THE JOURNAL OF ARACHNOLOGY Figure 8.—Cluinekefogoso gen. nov. et sp. nov., holotype 3 (CNAN). A. Carapace, dorsal aspect; B. Pectinosternal region. Scale bars = 0.5 mm. a basal bicusp characteristic of the family; ventrally with two and six with 11 (37.5%); on females six combs with eight teeth small teeth. (50%) and six with nine (50%). — Pedipalp: Femur with prodorsal, retrodorsal, anteromedian Variation, Pedipalp finger dentition was analyzed on six and proventral carinae strong, granulose; intercarinal spaces males and six females (both right and left fingers checked for moderately to densely granulose, with few clavate setae each specimen). The number of denticle rows on the fixed distally. Neobothriotaxia A alpha: r/j absent, /? and 4 petite finger was 10 on the 24 fingers checked; the number ofinner (Fig. lOA). Tibia heptacarinate, all carinae strong, granulose; accessory granules was 10 on females (10 fingers with 10 dorsal intercarinal spaces densely granulose, others moderate- granules, two fingers with 11) and 11 on males (two fingers ly to sparsely so, with scattered clavate setae throughout. with 10 granules and 10 fingers with 11 granules), and the Neobothriotaxia A: absent, no petite trichobothria number of outer accessory granules was 10 with no apparent (Figs. IOC, D). Chela with nine carinae, smooth to feebly sexual dimorphism (three fingers with nine granules and 21 crenulate; intercarinal spaces with moderately dense, small fingers with 10). The number ofdenticle rows on the movable granulation; with moderately dense, clavate setae throughout, finger was 11 on the 24 fingers counted; the number of inner including both fingers. Movable finger with 10 imbricated accessory granules was 11 on females (nine fingers with 1 principal rows ofgranules, fianked by 11 inner and nine outer granules and three fingers with 12) and 12 on males (12 out of accessory granules (Fig. 9B), the apical subrow (excluded 12), and the number of outer accessory granules was 11 with from counts) is composed by four granules located just basal no apparent sexual dimorphism (20 fingers with 11 granules, to the terminal denticle. Fixed finger with 10 imbricated four fingers [two male, two female] with 12 granules). — principal rows ofgranules, flanked by 11 inner and nine outer Distribution. This species is only known from the type accessory granules (Fig. 9C). Neobothriotaxia A: lacking Ebj, locality in t—he state of Guerrero (Fig. 3). Esh and esh (Figs. 1 1A, B). Remarks. The locality where the new species was collected Legs: Tibial spurs absent on all legs; prolateral and is a well-conserved, land-locked area; it is a small isolated hill m retrolateral pedal spurs present on all legs. Patellae and tibiae (approx. 200 high) along the coastal plains and has a with scattered clavate setae; tarsi with moderately dense, microwave relay station on top. It is in private property, pointed setae. surrounded by pasture-land and scattered cultivation plots. — Variability, Pectinal tooth counts varied as follows: on The original vegetation on the plain and lower slopes is males three combs with nine teeth (7.5%), 22 with 10 (55.0%) tropical deciduous scrub forest, whereas the upper reaches FRANCKE ET AL.—NEW GENUS OF BUTHIDAE FROM MEXICO 229 — Figure 9. Chanekefogoso gen. nov. et sp. nov.: holotype cJ (CNAN). A. Lateral aspect ofdistal portion ofmetasoma; B. Pedipalp chela movable finger showing dentition pattern; C. Pedipalp chela fixed finger showing dentition pattern. Scale bars = 0.5 mm. — Figure 10. Chanekefogoso gen. nov. et sp. nov.; holotype <3 (CNAN). A. Dorsal aspect of pedipalp femur, showing trichobothria (d2 missing); B. Frontal aspect ofpedipalp femur; C. Dorsal aspect ofpedipalp patella; D. Posterior aspect ofpedipalp patella. Scale bars = 1 mm.