Pikelinia floydmuraria sp. nov.

Type material.

Colombia, Tolima Ibagué • ♂ Holotype (4.4397°, -75.2382°) 16 May. 2025, alt. 1,280 m; (Rodríguez-Castro, G. leg.) in the walls of a parking lot, (CIUQ -026402).

Paratype: • 1 ♀, 1 ♂; Ibagué (4.4417°, -75.2378°), 12 jan. 2024, alt. 1,143 m (Villarreal O., García L., Santa-Delgado, L., González-Gómez, J., Nieto, M. leg.), in the wall of buildings, (CIUQ -026403). • 1 ♀, 1 ♂; Ibagué (4.4417°, -75.2378°), 12 jan. 2024, alt. 1,143 m (Villarreal O., García L., Santa-Delgado, L., González-Gómez, J., Nieto, M. leg.), in the wall of buildings, (MIZA 0105938).

Non-type examined: Colombia • 3 ♀♀, Tolima, Ibagué (4.4400°, -75.2383°) 16 May. 2025 (Rodríguez-Castro, G leg), (CIUQ -026404), (CIUQ -026405), (CIUQ -026406).

Diagnosis.

Pikelinia floydmuraria sp. nov. is the most similar and morphologically closest species to P. fasciata, sharing a nearly identical male palpal structure and leg II chaetotaxy. Males are distinguished from P. fasciata by the concolor leg pattern (vs. annulate) and the abdominal pattern of an irregular longitudinal central blotch (vs. two anterior pale spots and five transversal bands). Females are differentiated by the spermathecae with long, slender, S-shaped receptacle necks (vs. shorter, stouter, and C-shaped in P. fasciata).

Etymology.

The specific epithet “ floydmuraria ” is a neologism derived from “ Floyd ” (honoring the band Pink Floyd) and “ muraria ” (from Latin mūrus, wall), alluding to both the album “ The Wall ” and the species’ wall-dwelling habitat.

Description.

Male (holotype CIUQ -026402). Carapace moderate greenish yellow with lateral borders, thoracic groove and ocular area dark olive brown (Fig. 2 A, B). Sternum, light greenish yellow (Fig. 2 C), chelicerae dark yellow and anterior portion of the labium dark greenish yellow (Fig. 2 C). Legs moderate greenish yellow (Fig. 2 A). Abdomen dark olive brown on background light olive (Fig. 2 A). Total length 4.1. Carapace 1.1 long, 0.8 wide. Eye diameters: PME 0.1, separated by about 2 × diameters. Sternum, without sigillae. Leg measurements: I 6.3 (2.3, 0.4, 1.9, 0.9, 0.8),; II: 1.6, 0.1, 1.8, –, –, –; III: 1.2, 0.3, 1.1, 1.2, 0.6, 4.4; IV: 1.5, 0.3, 1.9, 1.5, 0.7, 5.9. Metatarsus II with a pair of large macrosetae (Figs 2 F, 2 G, 3 C, 3 D) on a cuticular outgrowth. Tarsus with some proximal ventral large setae (Fig. 2 F, G). Abdomen 2.2 long. Palp: 0.8, 0.4, 0.8 long, 0.3 wide; bulb 0.3 long, embolus 0.3 long. Palp: femur subcylindrical and slightly curved; tibia 2 × times longer cymbium, and slightly short than femur, with membranous area in the prolateral side and with retrodistal process large and curved; cymbium short; bulb globose and short, and embolus elongated and curved (Figs 2 D, 2 E, 3 A, 3 B).

Female (paratype CIUQ -026403). Coloration as in male, except for the carapace pattern, which consists of two irregular dark lines behind the eyes, converging towards the posterior half of the carapace, and the dorsal abdominal coloration, which exhibits a pattern of an irregular longitudinal central blotch with lateral expansions (Fig. 2 H). Total length 3.1. Carapace 1.1 long, 0.9 wide. Sternum as in male. Eye diameters: PME 0.07, separated by about 2 × diameters. Pedipalp: length 0.6, patella 0.1, tibia 0.4, tarsus 0.3. Legs measurements: I: 1.1, 0.3, 1.1, 0.7, 0.5, 3.7; II: 1, 0.2, 0.8, 0.5, 0.3, 2.8; III: 0.6, 0.2, 0.6, 0.5, 0.3, 2.2; IV: 1.3, 0.2, 0.6, 0.8, 0.3, 3.2. Pedipalp hirsute. Abdomen 1.5. Spermathecae with long, slender, S-shaped receptacle necks, globose receptacles; necks originating laterally on the outer side of the receptacle base. Receptacle bases thumb-shaped, bearing abundant glandular pores (Fig. 3 E)

Variation.

Males (N = 2): total length 3‒4.2 (average 3.6); carapace 1.4‒1.7 (average 1.6); femur I 2.8‒4.5 (average 3.7). Females (N = 7): total length 2.4‒3.9 (average 3.2); carapace 0.7‒1.4 (average 1.1); femur I 0.7‒1.6 (average 1.2).

Distribution.

Known only from the department of Tolima (Fig. 4).

Natural history.

Spiders were found associated with urban environments, particularly in walls next to streetlights (Fig. 5 E, F) where observed concentrations reached 20–30 individuals / m 2 (including juveniles). No specimens were found in natural conditions (i. e. far from urban habitats). Only specimens of Pikelinia sp. from Popayan were found in rural areas but also associated with anthropic conditions.

Prey records.

In our analysis of Pikelinia floydmuraria sp. nov. prey records, we identified a total of 66 prey items from five adult females in the Armenia population. In contrast, 103 prey items from 15 adult females were collected in the Ibague population. For the Armenia population, dipterans were the most abundant prey, followed by hymenopterans (mainly ants) and hemipterans. However, the Ibague population showed similar proportions of dipterans, hymenopterans (ants), and coleopterans. Other arthropods collectively constituted less than 10 % of the diet in both groups (Fig. 6 A). Regarding the prey size of the three most consumed orders in the Ibague population, spiders were found to prey on dipterans and coleopterans up to two times their prosoma size more frequently. For hymenopterans, spiders preyed on individuals up to six times their prosoma size, yet hymenopterans were consumed in similar proportions despite the size difference (Fig. 6 B). In the Armenia population, dipterans and hymenopterans consumed in similar sizes (Fig. 6 C). Notably, within dipterans, flies from the Muscidae and Culicidae families were identified but not quantified.