Thalerommata kogui Osorio, Benavides, García-Atencia & Bertani, 2024, sp. nov.
Creators: name: Osorio, Luis M.
name: Benavides, Léiner
name: García-Atencia, Sandy
name: Bertani, Rogério
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Barychelidae
Thalerommata
Thalerommata kogui

description: Thalerommata kogui sp. nov.
(Figs 5– 8, 13E)
Type material. Holotype ♂ from Colombia: Magdalena: Santa Marta, Minca, vda. San Lorenzo, ground hand collecting, cloud forest (11°06’18.2”N, 74°03’31.8”W) 2511m.a.s.l, 17 July 2022 L. Osorio, L. Benavides & M. J. García leg. (ICN-Ar 12994). Paratype 1 ♀ same data as holotype (ICN-Ar 12995).
Diagnosis. Males of T. kogui sp. nov. resemble those of T. gracilis, T. huila, T. macella, T. squamea and T. yukpa sp. nov. by having spinose cymbium (Fig. 6C–E). However, they differ from T. squamea and T. yukpa sp. nov. by the short embolus, slightly longer than tegulum (Fig. 6A, B). From T. huila by the non-sinuous embolus and the tibial apophysis having a lower spine (Fig. 5D, E). From T. macella and T. gracilis by the tibial apophysis having the upper and lower spines positioned roughly at the same level (Fig. 5D, E), and having a tubercle on the ventral distal metatarsus I (Fig. 5D). Females resemble those of T. maculata, T. caudicula, T. yukpa sp. nov. and T. margarita sp. nov. by having the distal article of PLS digitiform (Fig. 7D). They differ from all the species above in the morphology of the spermathecae with two short rounded receptacles not broadened at its base (Fig. 8A, B).
Etymology. The specific epithet is a noun in apposition to one of the 4 ethnic groups that are distributed in the Sierra Nevada de Santa Marta and whose culture still preserves many of its characteristics and traditions.
Description. Male holotype (ICN-Ar 12994). Carapace 5.54 long, 4.71 wide. Abdomen 5.84 long, 2.94 wide. Total length 12.82. Carapace: fovea slightly recurve, 0.46 wide (Fig. 5A). Clypeus absent. Eight eyes arranged on tubercle 0.95 wide, 0.59 long. MOQ 0.61 wide, 0.48 long. Anterior eye row straight, posterior row recurved (Fig. 5A). AME 0.19, ALE 0.30, PME 0.20, PLE 0.25. Eye interspaces: AME–AME 0.14, AME–ALE 0.08, ALE– ALE 0.48, PME–PLE 0.04, PME–PME 0.40, ALE–PLE 0.10, PLE–PLE 0.65. Chelicerae: 1.44 long, with 10 large spaced teeth and numerous tiny on basal inner edge. Intercheliceral intumescence absent. Rastellum composed of long thick setae. Labium ellipsoid, 0.40 long, 0.76 wide, with 18 cuspules rounded on the anterior half (Fig. 5B). Labiosternal groove shallow, with a pair of sigilla (Fig. 5B). Maxillae (Fig. 5B): 1.42 long in front, 1.79 long behind, 1.00 wide, with 44 cuspules on upper mound on inner angle. Heel distinct. Frontal lobe distinct, short. Prolateral edge whitish. Sternum (Fig. 5B): 2.67 long, 2.31 wide. Three pairs of sigilla, rounded. First pair close to coxa I, second pair close to coxa II, and third pair close to coxa III. All sigilla about one diameter from the margin. Lyra and stridulatory apparatus absent. Abdomen: booklungs small with elliptical aperture ca. 0.52 in length, booklung combs hardly visible. Spinnerets: PMS small, 0.52 long, 0.23 wide, 0.30 apart. PLS, basal segment, 0.96 long, 0.59 wide; middle 0.55 long, 0.41 wide; apical 0.70 long, 0.33 wide. Apical segment digitiform. Legs: IV–I–II–III. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 4.58, 2.80, 3.86, 3.65, 2.46,17.35; II: 4.14, 2.38, 3.05, 3.27, 2.27, 15.11; III: 3.10, 1.88, 2.74, 3.47, 1.91, 13.10; IV: 5.31, 2.37, 4.26, 5.38, 1.81, 19.13; Palp: 2.55, 1.60, 2.13, -, 1.13, 7.41. Widths: I: 1.21, 0.96, 1.04, 0.55, 0.41; II: 1.21, 0.95, 0.85, 0.65, 0.44; III: 1.36, 1.00, 0.98, 0.66, 0.42; IV: 1.20, 1.04, 0.95, 0.59, 0.47; Palp: 2.62, 1.60, 2.13, -, 1.13. Spines: tarsi of legs lack spines. Leg I: fe p0-0-2 r0-0-2, pa2, ti p1-0-1 v2-4-1ap, me p0-1-1 r0-1-0; leg II: fe d0-2-2, pa 1, ti p1-1-0 v2-2-1ap, me p0-1-1 v1-2-1; leg III: fe d0-2-2, pa2, ti d0-1-0 p1-0-0 r1-1-0 v2-2-2ap, me d0-0-3 p2-2-2 r2-2-1 v2-2-3ap; leg IV: fe d0-1-2, pa2, ti d0-1-0 p2-2-0 r2-2-0 v2-2-2ap, me d0-0-3 p2-3-2 r2,3,1 v2-3-3ap; palp: fe p0-0-1 r0-0-1, pa0, ti d1-0-0 p0-0-1 r0-0-1 v0- 0-2, cymbium 11 closely positioned at the apex. Clavate trichobothria in two rows, on distal half: 12 on tarsus I; 13 on tarsus II, 9 on tarsus III; 12 on tarsus IV; 11 on palpal tarsus. Claws: STC with double row of 6–6 teeth on leg I; 7–7 on leg II; 7–7 on leg III; 7–7 on leg IV. Tarsi of legs I–IV with sparse scopula; scopula on tarsi III–IV divided by a row of setae broader on III and IV. Metatarsi I–III scopulate on apical third. Tarsi I–IV cracked. Tibial apophysis (Fig. 5D, E): Upper and lower process positioned roughly at the same level. Small lower process with a small contiguous sinuous spine, three times process length. Upper process short, with slightly curved spine three times process length. Both structures on prolateral face of tibia. Tibia I with conspicuous excavation from area of apophysis to its tip. Metatarsus I (Fig. 5D, E): Curved, having distal bulge on ventral area, when folded it passes retrolaterally by apophysis. Palp (Fig. 6A–E): Bulb globous, embolus tapers to its tip and bears small distal keel, with slight curvature to retrolateral side. Tegulum 0.67 long, 0.66 wide, embolus 0.86 long, 0.18 wide at its base, 0.10 at middle, 0.02 at tip. Cymbium triangular in retrolateral view, not elongated, with deep incision. Palpal tibia lacking excavations but with group of spiniform setae arranged in distal retrolateral portion of tibia (Fig. 6D, E). Color pattern (preserved in alcohol) (Fig. 5A, C): Carapace, chelicerae and legs brown, abdomen darker with eight oval spots dorsally. Setae Type II (Ríos-Tamayo, 2024) only on abdomen, occurring both dorsally and ventrally.
Description. Female paratype (ICN-Ar 12995) Carapace 6.04 long, 4.37 wide. Abdomen 8.80 long, 5.41 wide. Total length 17.03. Carapace: Fovea straight, 0.47 wide (Fig. 7A). Clypeus absent. Eight eyes arranged on tubercle 1.04 wide, 0.57 long. MOQ 0.62 wide, 0.43 long. Anterior eye row straight, posterior row slightly recurved (Fig. 7A). AME 0.19, ALE 0.26, PME 0.16, PLE 0.26. Eye interspaces: AME–AME 0.13, AME–ALE 0.11, ALE–ALE 0.59, PME–PLE 0.07, PME–PME 0.45, ALE–PLE 0.16, PLE–PLE 0.76. Chelicerae: 2.19 long, with 12 spaced teeth and numerous tiny denticles on its base. Rastellum composed of long thick setae. Labium ellipsoid, 0.62 long, 0.98 wide, having 26 cuspules rounded on distal half (Fig. 7B). Labiosternal groove shallow, with pair of sigilla (Fig. 7B). Maxillae (Fig. 7B): 1.64 long in front, 2.43 long behind, 1.12 wide, with ca. 67 cuspules on upper mound in inner angle. Heel distinct. Frontal lobe distinct, small. Prolateral edge whitish. Sternum (Fig. 7B): 3.15 long, 2.78 wide. Three pairs of sigilla, rounded. First pair close to coxa I, second pair close to coxa II, third pair close to coxa III. All sigilla about one diameter from margin. Lyra and stridulatory apparatus absent. Abdomen: booklungs small with elliptical aperture ca. 0.50 in length, booklung combs absent. Spinnerets (Fig. 7D): PMS small, 0.63 long, 0.26 wide, 0.26 apart. Basal, middle, and apical segments of PLS, 1.16 long, 0.56 wide; 0.69 long, 0.49 wide; 0.83 long, 0.34 wide, respectively. Apical segment digitiform. Legs: formula IV–I–II–III. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 4.47, 3.14, 3.34, 3.02, 2.01, 15.98; II: 4.23, 2.55, 2.68, 2.48, 1.77, 13.65; III: 3.60, 2.18, 2.34, 3.00, 1.85, 12.97; IV: 5.09, 2.33, 4.00, 4.80, 2.20, 18.42. Palp: 3.43, 2.04, 1.89, -, 1.34, 8.70. Widths: I: 1.04, 1.29, 1.06, 0.73, 0.63; II: 1.31, 1.07, 0.93, 0.73, 0.60; III: 1.40, 1.16, 1.06, 0.75, 0.61; IV: 1.34, 1.47, 1.22, 0.99, 0.56. Palp: 0.81, 1.01, 0.90, -, 0.94. Spines: leg I: fe:0, pa0, ti p1-1-0 v1-1-1ap, me v1-0-1ap; leg II: fe p0-0-1, pa0, ti p1-1-0 v1-1-0, me p0-1-0 v1-2-1ap; leg III: fe d0-0-1, pa0, ti p1-2-0 v3-2-3ap, me v3-3-2ap; leg IV: fe0, pa0, ti p1-1-0 r1-2-0 v3-2-2ap, me p2-2-1 v0-3-2 r1-2-3; palp: v0-2-3ap. PC absent. Clavate trichobothria in two rows on distal two-thirds: 15 on tarsus I; 15 on tarsus II; 12 on tarsus III; 11 on tarsus IV; 15 on palpal tarsus. Claws: STC bare on all legs; palpal claw single, bare. Tarsi I–IV scopulate, divided by broad row of setae, metatarsus I–IV apically scopulate, on IV inconspicuous. Tarsi IV cracked. Spermathecae (Fig. 8): two, short, rounded. Color pattern (preserved in alcohol) (Fig. 7A, C): as in male. Setae Type I (Ríos-Tamayo, 2024) only on abdomen, occurring both dorsally and ventrally.
Distribution. Colombia: Magdalena Department, Cuchilla de San Lorenzo, Sierra Nevada de Santa Marta (Figs. 13B, 14).
description: Published as part of Osorio, Luis M., Benavides, Léiner, García-Atencia, Sandy & Bertani, Rogério, 2024, Three new species of tiny tarantulas of the genus Thalerommata Ausserer, 1875 (Araneae, Theraphosidae) from northern Colombia, pp. 95-114 in Zootaxa 5537 (1) on pages 101-104, DOI: 10.11646/zootaxa.5537.1.5, http://zenodo.org/record/14239357