Cystowithius ankeri García & Romero-Ortiz, 2021

García, Fabián & Romero-Ortiz, Catalina, 2021, Cystowithius ankeri sp. nov. (Arachnida: Pseudoscorpiones: Withiidae), a new pseudoscorpion from the Central Andes of Colombia, Zoologia (e 21003) 38, pp. 1-8 : 2-5

Cystowithius ankeri García & Romero-Ortiz sp. nov.

Figs 1–12 , 15

http://zoobank.org/ 28E78A33-60FA-4B48-A59B-77B0D4404229

Type-material. Holotype male, COLOMBIA: Caldas, Manizales, Jardín Botánico de la Universidad de Caldas, 5.044°N 75.4894°W, 2150 m, February 2021 F. García leg., under bark of Eucalyptus grandis , ICN-APs-837.

Paratypes. 1 male, same collection locality as for holotype, August 2018, A. Anker and F. García leg., ICN-APs-682 [Genbank accession number ( MT085822 )] ; 3 females, 5 males, same collection locality and collector as for holotype; August 2019, ICN-APs-766 (1 male), ICN-APs-767 (1 female), MUSENUV-Ar-2097 (1 male), MUSENUV-Ar-2098 (1 female), NHMW 29570 (1 male, 1 female), MPEG PSE 000012 (1 male), MNRJ 10417 (1 male) ; 2 females, same collection locality and collector as for holotype, December 2019, MNRJ 10418 (1 female), MPEG PSE 000012 (1 female) ; 1 male , Caldas, Villamaría, Vereda Gallinazo , under bark of E.grandis , 5.015°N, 75.439°W, 2300 m, December 2019, F. García leg., ICN-APs-768 .

Additional examined material. COLOMBIA: 2 males, Caldas, Villamaría, Vereda Gallinazo , 5.015°N, 75.439°W, 2300 m, March 2021, F. García and D. Duque leg., under bark of E. grandis , ICN-APs-839 .

Diagnosis. Cystowithius ankeri sp. nov. can be separated from the other four species of the genus as follows: from C. chamberlini by the granulate pedipalp hand (versus smooth in C. chamberlini ), the strongly denticulate setae on the chelal hand (versus barely denticulate in C. chamberlini ) and the tactile seta of tarsus IV situated in more distal position, i.e. subdistally (versus closer to mid-length of tarsus IV in C. chamberlini ); from C. smithersi by the movable finger of the pedipalp being more than 0.70 mm (versus not exceeding 0.60 mm in C. smithersi ); from C. colombicus and C. ecuadoricus by the comparatively smaller chela, i.e. chela (with pedicel) reaching 1.56 mm (versus less than 1.20 mm in the other species); from C. colombicus , C. ecuadoricus and C. smithersi by the male sternal invaginations present on the sternites VI–VIII (versus V–VIII in C. smithersi and C. ecuadoricus and VI–VII in C. colombicus ). See also the identification key below.

Description. Habitus ( Figs 1–3 , 15 ): carapace and pedipalps dark red-brown; tergites and coxal region red-brown; legs redbrown, paler at base and darker distally. Carapace ( Fig. 4 ): granulate, with 2 non-corneate eye spots, 1.26 (♂), 1.20 (♀) × longer than broad; with ca. 66 (♂), 45 (♀) foliate setae, including 4 (♂, ♀) near anterior margin and 6 (♂, ♀) near posterior margin; with 2 deep furrows closer to posterior carapace margin than to anterior furrow. Chelicera ( Figs 5, 6 ): with 5 setae on hand, bs and sbs denticulate, others acuminate; with 2 dorsal lyrifissures; galea (♂) with 3 small terminal rami, (♀) with 4 small terminal rami; rallum of 4 blades, first slightly serrated, others smooth; serrula exterior with 19–20 blades; lamina exterior present; Pedipalp ( Figs 7, 8 ): trochanter, femur, patella and chelal hand granulate, with foliate setae; trochanter 1.65–2.00 (♂), 1.69–2.00 (♀), femur 5.20–5.72 (♂), 4.65–5.94 (♀), patella 3.56–3.83 (♂), 3.28–4.44 (♀), chela (with pedicel) 1.48–1.58 (♂), 1.56–1.62 (♀), chela (without pedicel) 1.41–1.48 (♂), 1.48–1.58 (♀), hand 2.00–2.34 (♂), 1.75–2.00 (♀) × longer than broad, movable finger 0.74–0.80 (♂), 0.79–0.82 (♀) × longer than hand. Fixed chelal finger with 8 trichobothria, movable chelal finger with 4 trichobothria: eb and esb situated basally; est, it, and isb grouped together submedially; ist and ib situated basally; b and sb situated near one another; st closer to b than to t.; distance between t and the fingertip equal to st. Nodus ramosus not visible. Coxal region: maxilla with 2 apical setae, 1 sos and 25 (♂), ca 27 (♀) additional setae; median maxillary lyrifissure rounded, situated medially; posterior maxillary lyrifissure present, coxal chaetotaxy: (♂), 10:11:9:18; (♀), 8: 10:9: 19. Abdomen ( Figs 9, 10 ): tergites I-IX with yellowish suture line; tergal chaetotaxy: (♂), 10: 10: 9: 11: 12: 14: 12: 14: 13: 12: 11 (including 2 ts): 2; (♀), 8: 10: 10: 12: 14: 16: 15: 13: 12: 12 (including 4 ts): 2, all setae foliate; pleural membrane longitudinally striate; sternal chaetotaxy: (♂), 12: (1) 9 (1): (2) 12 (2): 15: 16: 13:14 + 44/46 gls: 11 + 1/1 gls: 10: 12 (including 4 ts): 2; (♀), 10: (1) 12 (1): (2) 11 (2): 16: 16: 17: 17: 13: 10: 8 (including 4 ts): 2, setae uniseriate and acuminate, except for setae on sternite XI, latter strongly denticulate; males with patches of small, conical, glandular setae on sternites VIII–IX and paired invaginations on sternites VI–VIII. Legs ( Figs 11, 12 ): trochanter, femur, patella, tibia and tarsus of all legs granulate, with foliate setae; junction between femur and patella I parallel; femur + patella of leg IV 3.60 (♂), 5.00 (♀) × longer than deep; tactile tarsal seta of leg IV situated subdistally (TS = 0.77 (♂) and 0.68 (♀ )); claws simple; arolium shorter than claws. Genitalia: ejaculatory canal projected in form of inverted triangle; dorsal apodeme sclerotization moderate to attenuate, reaching half or less of apodeme, straight throughout its length, wider at ejaculatory canal atrium; lateral apodeme extending at most to half-length of ejaculatory canal atrium, rounded basally, projected dorsally in lateral view; ejaculatory canal reaching one third of genital armature length, with rounded tip, sclerotized posteriorly, concave in lateral view; lateral rods straight, divergent dorsally, extending beyond lateral apodemes in dorsal view.

Dimensions. Males: holotype followed by six paratypes in parentheses. Pedipalp: trochanter 0.48/0.24 (0.4–0.44/0.2– 0.26), femur 1.04/0.2 (0.82–1.06/0.18–0.20), patella 0.92/0.24 (0.82–0.89/0.23–0.25), chela (with pedicel) 1.56 (1.48–1.58), chela (without pedicel) 1.48 (1.41–1.51), hand length 0.78/0.36 (0.66–0.78/0.33–0.34), movable finger length 0.8 (0.74–0.79). Carapace: 0.96/0.84. Leg I: trochanter 0.23/0.24, femur 0.19/0.19, patella 0.42/0.160, tibia 0.46/0.11, tarsus 0.368/0.07. Leg IV: femur/patella 0.95/0.26, tibia 0.60/0.14, tarsus 0.424 / 0.336. Females: Paratype (ICN-APs-767) followed by five paratypes in parentheses. Pedipalp: trochanter 0.50/0.24 (0.44– 0.46/0.25), femur 1.04/0.2 (1.07/0.18–0.23), patella 0.86/0.22 (0.82–0.84/0.18–0.23), chela (with pedicel) 1.58 (1.56–1.62), chela (without pedicel) 1.50 (1.48–1.58), hand length 0.80/0.40 (0.72–0.74/0.36–0.41), movable finger length 0.8 (0.77–0.82). Carapace: 1.0/0.9. Leg I: femur 0.20/0.20, patella 0.44/0.13, tibia 0.41/0.08, tarsus 0.38/0.06. Leg IV: trochanter 0.32/0.19, femur/ patella 0.88/0.24, tibia 0.60/0.12, tarsus 0.43/0.08.

Distribution. Cordillera Central of the Colombian Andes: presently known only from Manizales and Villamaría areas of Caldas.

COI barcode. GenBank accession number MT085822 (paratype, ICN-APs-682).

Etymology. This species is named after Dr. Arthur Anker, a zoologist with broad interests, who participated in the discovery of this new species.

Figures

Figures 1–3. Cystowithius ankeri sp. nov. in situ, Jardín Botánico de la Universidad de Caldas, Manizales, Caldas, Colombia: (1) paratype male, ICN-APs682; (2) paratype male, ICN-APs-766; (3) paratype female, ICN-APs-767. Photographs by Arthur Anker.

Figures 4–12. Cystowithius ankeri sp. nov., Jardín Botánico de la Universidad de Caldas, Manizales, Caldas, Colombia: (4–8, 10–12) holotype male, ICN-APs-837; (9) paratype male, ICN-APs-766. (4) Carapace, dorsal view; (5) left chelicera, dorsal view; (6) right rallum; (7) left chela showing trichobothrial pattern, retrolateral view; (8) right pedipalp, ventral view; (9) patches of glandular setae on sternite VIII; (10) sternite XI and tergite XI; (11) left leg I, lateral view; (12) left leg IV, lateral view. Scale bars: 0.05 mm (10), 0.1 mm (5, 9), 0.5 mm (4, 7, 8, 11, 12).

Figures 15–19. Male specimens and distribution records of five species of Cystowithius: (15) C. ankeri sp. nov., paratype, MPEG PSE 000012; (16) C. chamberlini, incomplete holotype, CAS 18448; (17) C. colombicus, paratype, NHMW 24058; (18) C. ecuadoricus, paralectotype, NHMW 24056; (19) C. smithersi, paratype, MNHN, no number provided. Scale bars: 0.5 mm (15, 16); 1 mm (17, 18); without scale (19).