A new genus and five new species of pseudoscorpions (Arachnida, Pseudoscorpiones, Withiidae) from Colombia Author Romero-Ortiz, Catalina https://orcid.org/0000-0001-8939-7814 Laboratorio de Sistematica y Biologia Comparada de Insectos, Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogota, Colombia icromeroo@unal.edu.co Author Sarmiento, Carlos E. https://orcid.org/0000-0003-4012-8108 Laboratorio de Sistematica y Biologia Comparada de Insectos, Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogota, Colombia Author Harvey, Mark S. https://orcid.org/0000-0003-1482-0109 Collections and Research, Western Australian Museum, Welshpool, Western Australia 6106, Australia & School of Biological Sciences, The University of Western Australia, Crawley, Western Australia 6009, Australia text ZooKeys 2023 2023-11-22 1184 301 326 http://dx.doi.org/10.3897/zookeys.1184.106698 journal article http://dx.doi.org/10.3897/zookeys.1184.106698 1313-2970-1184-301 4EB4BEE3865E4CF29F7B6477D2DEF4AF 283A8869D1C3500A8A3C075E14584C90 Paciwithius chimbilacus sp. nov. Figs 1A , 2 , 3 , 9A Material examined. Holotype . Colombia • ♂ ; Meta , San Martin , Vda. San Francisco, Hacienda La Maria ; [ 3°39'55.5"N , 73°39'29.7"W ]; 400 m ; on bat guano; ICN-APs-076. Paratype . Colombia • 1 ♂ ; same data as for the holotype; ICN-APs-076 . Diagnosis. Males of Paciwithius chimbilacus sp. nov. can be distinguished from P. valduparensis sp. nov. by a slender pedipalpal femur and patella (femur: 4.10-4.35 x longer than broad in P. chimbilacus and 4.00 in P. valduparensis ; patella: 3.33-3.43 x longer than broad in P. chimbilacus and 2.27 x in P. valduparensis ), and a stouter chela (3.16-3.33 x longer than broad in P. chimbilacus and 3.52 x in P. valduparensis ). Description. Adults. Color : carapace brownish, darker than the tergites. Tergites yellow-brown, heavily granulated. Legs yellowish, proximal segments darker than the distal ones. Pedipalps reddish brown, heavily granulated; chela and fingers reddish (Fig. 1A ). Figure 1. Habitus of the new species (males) A Paciwithius chimbilacus sp. nov. B Cystowithius florezi sp. nov. C Parawithius bromelicola sp. nov. D Oligowithius achagua sp. nov. Scale bars: 0.5 mm. Figure 2. Distribution of the new species and the new record of Withiidae from Colombia. Dimensions (mm) (L/W): male: holotype: body length 1.93. Pedipalps: trochanter 0.34/0.20, femur 0.70/0.16, patella 0.63/0.18, chela (with pedicel) 0.94/0.26, chela (without pedicel) 0.88, hand (without pedicel) length 0.52, movable finger length 0.44. Chelicera 0.19, movable finger length 0.14. Carapace 0.66/0.52 (width at medial area). Leg I: femur 0.13/0.13, patella 0.27/0.11, tibia 0.29/0.08, tarsus 0.28/0.06. Leg IV: femur + patella 0.55/0.16, tibia 0.49/0.10, tarsus 0.37/0.06. Male: paratype: body length 1.78. Pedipalps: trochanter 0.36/0.19, femur 0.69/0.17, patella 0.64/0.19, chela (with pedicel) 0.92/0.27, chela (without pedicel) 0.86, hand (without pedicel) length 0.46, movable finger length 0.42. Carapace (Fig. 3A ): 1.28 x longer than broad; lateral margins not posteriorly widened; without eyes or eyespots; with 55 setae, distributed: 29 anterior (two near anterior margin), 18 in the mesozone, and eight near posterior margin, all clavate; with two distinct furrows; posterior furrow slightly closer to posterior carapace margin than to median furrow (Fig. 3A ). Figure 3. Paciwithius chimbilacus sp. nov. (male holotype, ICN-Aps-076) A carapace B chelicera C rallum D left pedipalp E right chela F left leg I G left leg IV H right chela fingers (arrows show sense-spots) I abdomen, sternites. Abbreviations: Pedipalp movable finger: b = basal; sb = sub-basal; st = sub-terminal; t = terminal; fixed finger: eb = exterior basal; esb = exterior sub-basal; est = exterior sub-terminal; et = exterior terminal; ib = interior basal; isb = interior sub-basal; ist = interior sub-terminal; it = interior terminal. Cheliceral setae: b = basal seta; es = exterior seta; is = interior seta; ls = laminal seta. Scale bars: 0.5 mm ( D ); 0.1 mm ( A, E-I ); 0.05 mm ( B ); 0.0125 mm ( C ). Chelicera (Fig. 3B ): with five setae on hand, bs denticulate; movable finger with single subdistal seta; galea simple; rallum of four blades, the most distal blade with several serrations on leading edge, other blades smooth (Fig. 3C ); two dorsal lyrifissures. Pedipalp (Fig. 3D, E, H ): trochanter, femur, patella and chelal hand granulate, fingers smooth; dorsal setae clavate; trochanter 1.72-1.88 x , femur 4.10-4.35 x , patella 3.33-3.43 x , chela (with pedicel) 3.38-3.56 x , chela (without pedicel) 3.16-3.33 x , hand 1.69-1.97 x longer than broad, movable finger 0.85-0.92 x longer than hand. Fixed chelal finger with eight trichobothria, movable chelal finger with four trichobothria (Fig. 3E, H ): eb and esb situated basally, as well as ib and ist ; isb parallel to est both situated submedially, it midway between them and et ; b and sb situated near one another, st closer to sb than to t , t situated submedially. Venom apparatus not visible, venom ducts not visible; nodus ramosus distal to t on movable finger, and not visible on fixed finger. Retrolateral margin of fixed finger with two sense-spots (Fig. 3H ), one situated close to esb and eb , and the other distal to est . Chelal teeth squared; fixed finger with 35 teeth; movable finger with 37 teeth; accessory teeth absent. Coxal region : coxal chaetotaxy: 20: 23: 24: 35; maxilla with 38 setae including two apical setae and one very small internal, sub-oral setae; median maxillary lyrifissure medial in position, posterior lyrifissure not visible. Legs (Fig. 3F, G ): junction between femora and patellae I and II parallel, junction in legs III and IV oblique; tarsal tactile seta of leg IV absent; arolium slightly shorter than claws; claws simple; legs with scale-like appearance, many clavate setae on leg IV. Ratios: leg I: femur 1.00 x , patella 2.43 x , tibia 3.60 x , tarsus 4.38 x deeper than broad. Leg IV: femur + patella 0.33 x , tibia 5.08 x , tarsus 5.75 x deeper than broad. Abdomen (Fig. 3I ): tergites I-IV entire, the others with a faint medial suture, not keeled; sternites III-VII divided, sternites VIII-XI entire. Tergal chaetotaxy: 10: 10: 10: 11: 11: 12: 10: 12: 11: 8: 6: 4; mostly uniseriate but some tergites with a few setae placed anteriorly; all setae clavate. Sternal chaetotaxy: 10: (2) 13 (2): (2) 11 (2): 18: 19 + 1 gls : 20 + 24 gls : 13 + 84 gls : 9 + 4 gls + 4 clavate: 10 + 7: 6 + 4 clavate setae: 2; sternites with many lyrifissures; sternite VI with one glandular seta, sternites VII-VIII of male with patches of glandular setae (Fig. 9A ); glandular setae in extended patches (Fig. 9A ); setae mostly uniseriate and acuminate but some clavate; male without paired invaginations on anterior margins of sternites. Genitalia : see Romero-Ortiz and Sarmiento (2021) as "nr. Victorwithius 1"; male with elongated lateral apodemes although other structures not visible. Etymology. This species epithet is derived from the common name of bats in the Meta region "chimbilaco" , due to the bat guano where the specimens were found.