Paciwithius chimbilacus, Romero-Ortiz & Sarmiento & Harvey, 2023

Romero-Ortiz, Catalina, Sarmiento, Carlos E. & Harvey, Mark S., 2023, A new genus and five new species of pseudoscorpions (Arachnida, Pseudoscorpiones, Withiidae) from Colombia, ZooKeys 1184, pp. 301-326 : 301

publication ID	https://dx.doi.org/10.3897/zookeys.1184.106698
publication LSID	lsid:zoobank.org:pub:4EB4BEE3-865E-4CF2-9F7B-6477D2DEF4AF
persistent identifier	https://treatment.plazi.org/id/BDB0823D-51CB-4F25-8B1C-BF95D10D8F7D
taxon LSID	lsid:zoobank.org:act:BDB0823D-51CB-4F25-8B1C-BF95D10D8F7D
treatment provided by	ZooKeys by Pensoft
scientific name	Paciwithius chimbilacus
status	sp. nov.

Treatment

Paciwithius chimbilacus sp. nov.

Figs 1A View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 9A View Figure 9

Material examined.

Holotype. Colombia • ♂; Meta, San Martín, Vda. San Francisco, Hacienda La Maria ; [3°39'55.5"N, 73°39'29.7"W]; 400 m; on bat guano; ICN-APs-076. GoogleMaps

Paratype. Colombia • 1 ♂; same data as for the holotype; ICN-APs-076 GoogleMaps .

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 × longer than broad in P. chimbilacus and 4.00 in P. valduparensis ; patella: 3.33-3.43 × longer than broad in P. chimbilacus and 2.27 × in P. valduparensis ), and a stouter chela (3.16-3.33 × longer than broad in P. chimbilacus and 3.52 × 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 View Figure 1 ).

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 View Figure 3 ): 1.28 × 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 View Figure 3 ).

Chelicera (Fig. 3B View Figure 3 ): 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 View Figure 3 ); two dorsal lyrifissures.

Pedipalp (Fig. 3D, E, H View Figure 3 ): trochanter, femur, patella and chelal hand granulate, fingers smooth; dorsal setae clavate; trochanter 1.72-1.88 ×, femur 4.10-4.35 ×, patella 3.33-3.43 ×, chela (with pedicel) 3.38-3.56 ×, chela (without pedicel) 3.16-3.33 ×, hand 1.69-1.97 × longer than broad, movable finger 0.85-0.92 × longer than hand. Fixed chelal finger with eight trichobothria, movable chelal finger with four trichobothria (Fig. 3E, H View Figure 3 ): 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 View Figure 3 ), 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 View Figure 3 ): 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 ×, patella 2.43 ×, tibia 3.60 ×, tarsus 4.38 × deeper than broad. Leg IV: femur + patella 0.33 ×, tibia 5.08 ×, tarsus 5.75 × deeper than broad.

Abdomen (Fig. 3I View Figure 3 ): 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 View Figure 9 ); glandular setae in extended patches (Fig. 9A View Figure 9 ); 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.