Hanseniella chocoita sp. nov.

Figs 14, 15, 16, 17, 18, 19

Type material.

Holotype • male (CTNI -10574 a), Colombia: Santander, Girón, Vereda Chocoita, manual collection in pineapple farming, 850 m a. s. l., 6.9867, -73.1628, 15 - IX- 2020. J. Montes-Rodríguez. Paratypes • 2 females, 1 male (CTNI -10574 b-d) same data as for holotype; • 2 females, 1 male (CTNI 10412 a-c) Colombia: Santander, Girón, Vereda Chocoita, manual collection in pineapple farming, 850 m a. s. l., 6.9867, -73.1628, 15 - VIII- 2020. J. Montes-Rodríguez.

Diagnosis.

Hanseniella chocoita sp. nov. shares the same pattern of macrochaetae on tergites 2–4, 6–7, and 9 with H. aculeata Jupeau, 1954, H. afromontana Scheller, 1954, H. armigera Scheller, 1961, H. caldaria (Hansen, 1903), H. colombiana Juberthie-Jupeau & Réveillet, 1997, H. conisetosa Scheller, 1971, H. echinata Adam & Burtel, 1956, H. ghanensis Belfield, 1988, H. guimaraensis Scheller, 2007, H. hortulana Scheller, 1971, H. incompta Scheller, 1971, H. ivorensis Juberthie-Jupeau & Kehe, 1978, H. lebrijana sp. nov. Montes, Parra-Gómez, Holguín & Marchant, 2025, H. lucifuga Scheller, 1961, H. milloti Aubrey & Masson, 1953, H. modesta Aubrey & Masson, 1953, H. montana Scheller, 1971, H. orientalis (Hansen, 1903), H. remyi Aubrey & Masson, 1953, H. similis Scheller, 1961 and H. unguiculata (Hansen, 1903). It differs from them by the following combination of characters: body length 3.4–4.4; distinct central rod on head; first maxillary palp with the apex divided into three tips, central tip broader than flanking ones; surface of antennomeres 4 and 5 with scaly pattern mixed with micropubescence; antennae with three whorls maximum, simple setae of varying size and small trifurcate organs; apical antennomere with usual stalk organ, plus a smaller one; first rudimentary tergite with four or five setae; posterior margin of tergite 2 slightly convex, in tergite 3 mostly straight, in tergites 13 or 14 sightly concave; anterior margin of all tergites glabrous, with pattern of transverse arched mixed with micropubescence; sclerites near coxal sacs with simple setae; first pair of legs with posterior claw straight and subulate, and frontal setae short and lanceolate; 12 th pair of legs with anterior claw with proximal half thick, posterior portion moderately arched and relatively broad, tip acuminate; styli with two setae, with smaller setae arising from a tiny conical protuberance at the apex of styli; cerci setose, bearing simple setae and with a significant basal portion glabrous and with micropubescence. It can also be differentiated from the most similar species by markedly different size and shape of claws of the 12 th pair of legs in H. chocoita sp. nov., while similar in size in H. aculeata. A greater number of setae on the cerci (75–106), while H. montana has fewer than 20. The length of the cerci of H. hortulana and H. armigera is 4 × longer than wide, while in H. chocoita sp. nov. it is less than 3.17. Hanseniella similis in the equiangular trapezoidal shape of the third tergite, whereas in H. chocoita sp. nov. it is subrectangular. It differs from Hanseniella milloti in the shape of its cerci, which is relatively shorter and has fewer and longer setae than H. chocoita sp. nov. and differs from H. incompta in the tip of the maxillary palp, which is divided in H. chocoita sp. nov. and continuous in H. incompta.

Description.

Length of body without antennae and cerci 3.4 (3.4–4.4) mm, antenna 1.15–1.37 (1.15–1.71). Head. Slightly longer than wider, 1.01 (1.01–1.17) × broader than long, frontal margin convex, lateral margin at point of articulation smooth, posterior margin straight with rounded posterolateral angles (Fig. 14 A). Central rod ovoid posteriorly (Fig. 14 D). Dorsal surface smooth without micropubescence or microsculpture, except for the anterior area of the head between the antennae, which has a scale-like cuticle. Dorsal surface covered by straight setae not significantly different, few large setae ~ 2.0 × longer than normal setae and 0.50 × the width of the first antennomer, arranged in 3 + 3 anteriorly of antennal insertion, four on the anterior margin of the head, four near the anterior margin and three laterally on each side behind the rounded Tömösváry’s organ. Area around Tömösváry’s organ granular in texture (Fig. 14 C). Each anterior plate of the second maxillae with two proximal setae. External-distal corner of these plates with four or five sets of sensilla with typical chandelier shape decreasing in size proximally and two elongated setae inserted on conic protuberances. Three terminal protuberances with 1–3 setae plus a single large distal sensillum, the two medial protuberances with a contiguous tiny tooth (Fig. 15). First maxillary palp conical with the apex divided into three tips, central tip broader than flanking ones (Fig. 14 B).

Antennae. (Fig. 16). Long, 0.33–0.40 × the length of the body, composed of 20–24 antennomers. Surface with scaly pattern mixed with micropubescence present from first to 4–5 antennomers, gradually disappearing as micropubescence become more abundant; from segment 6 onwards, pattern no longer visible and micropubescence uniform. First antennomere 1.59 × wider than longer, with a whorl of setae initially with three outer setae, from the second antennomere onwards with 7–10 setae. Second antennomere 1.84 × wider than longer. Second whorl with two types of setae: (i) Small inner setae, three on first antennomere and gradually decreasing in number until disappearing on distal antennomers. (ii) larger setae appear on the intermediate segments with three setae and gradually increasing up to ten setae towards the last antennomeres. Third whorl starts in the middle segments with one seta and ends in the last segments with two. An additional intermediate seta between whorls 2 and 3 present on the penultimate and antepenultimate antennomers. Apical antennomere spherical, apex bearing a large sensory organ borne from a small protuberance, composed of a central stalk which yields five slightly longer spiniform processes. One additional similar organ smaller and without protuberance.

Tergites. (Fig. 17, Table 8) Cuticle with the area anterior to setae with pattern of transverse arches mixed with micropubescence. First tergite rudimentary, with only four or five central setae. From third tergite onwards: 0.33–0.5 anterior surface without setae, pattern of transverse arches imperceptible in the area with setae. Four types of setae of different length present on tergites: (i) small and similar in size, covering the tergal surface; (ii) ~ 2 × as large as the anterior type, sparsely present on the posterior margin; (iii) ~ 1.5 × larger than the large marginal ones, located on the posterolateral corners except on tergites 1, 14, and 15; (iv) Macrochaetae in segments 2–4, 6, 7, and 9, ~ 1.5 × larger than the anterior type.

Legs. (Figs 18, 19 H, I) First pair of legs composed of four segments. First podomere subrectangular, ~ 1.3 × longer than wide, with poorly defined scaly pattern, scattered micropubescence and ~ 3 posteroventral setae. Second podomere subrectangular, ~ 1.4 × longer than wide, most of the posterior surface with a scaly pattern and scattered micropubescence that becomes denser in the distal area, with ~ 9 setae on posterior face and four ventral setae. Third podomere subrectangular, 1.15 × longer than wide, weak hexagonal pattern and micropubescence, with ~ 1 posterodorsal and four dorsal setae. Fourth podomere elongated, ~ 3.8 × longer than wide, covered uniformly with micropubescence, with ~ 13 setae arranged in five rows (only ten visible in Fig. 18). Anterior claw basally thick, medially arched, ~ 2 × as large as the posterior, posterior claw straight and subulate, frontal setae short and lanceolate, ~ 0.5 length of the anterior claw.

12 th pair of legs with all podomeres bearing micropubescence in anterior view. First podomere subtriangular, ~ 1.5 × wider than long, with three or four anteroventral setae. Second podomere subrectangular, ~ 1.3 × longer than wide, anterior face with ~ 14 setae of similar size and four ventral setae. Third podomere trapezoidal, ~ 1.03 × longer than wide, with ~ four on anterior face and seven dorsal setae in two rows. Fourth podomere subrectangular, ~ 2 × longer than wide, with ~ 4 setae on anterior face, seven dorsal setae in two rows, two or three ventral setae and five setae on posterior face (not visible in Fig. 18), the posterior and dorsal setae larger than the others. Fifth podomere elongated, ~ 4.4 × longer than wide, with ~ 21 setae arranged in six longitudinal rows (only 11 visible in Fig. 18). Claws different in size, proximal half of anterior claw thicker than the distal half, posterior portion moderately arched and relatively broad, posterior claw arched and slender than anterior claw, frontal seta lanceolate, about half the length of the anterior claw. Ventral surface. (Fig. 19 A, D) Membranous and mostly granular in appearance, apart from the coxal sacs and styli. Sclerites near coxal sacs presents on every pair of legs except the first. Smallest near the second and last pair of legs, elongated with ~ 3–5 setae. Rest of sclerites subtriangular with ~ 8–33 setae. Last segment ventrally with micropubescence and transverse arch pattern, with ~ 18 setae. Last segment covering partially the base of the cerci ventrally. Coxal sacs. (Fig. 19 A, D). Fully developed only near the bases of legs 3–9, composed of two semicircular sclerites, surface bearing micropubescence, distal sclerite relative to the base leg with ~ 3–5 setae, proximal sclerite with two or three. Leg pairs 2, 10, and 11 with sclerites bearing ~ 2–5 setae. Sclerites of leg pair 2 oval-shaped, on pairs 10 and 11 subtriangular. Male organs. (Fig. 19 A, B) Simple, two contiguous semicircular sclerites covered with micropubescence, each with a row of conical setae directed medially and three or four outer setae. Styli. (Fig. 19 C, D) Elongated with micropubescence, apically with a large conical seta along with another smaller seta. The small seta arises from a tiny conical protuberance at the apex of the styli. Larger seta 2.5 × the size of the small one. Sense calicles. (Fig. 19 E) Pit margin surrounded by simple and some branched setae. Sensory seta with a wide base, inserted in the middle of the cavity, as long as the cerci in length. Cerci. (Fig. 19 F, G) Conical and with micropubescence, 3.08–3.17 longer than broad. Surface covered by 75–76 (75–116) setae, distal ones slightly longer than proximal. 15 % basal portion glabrous, apical 20 % portion also glabrous, but with only 15 % without any micropubescence. Apical setae 0.65–0.66 × the width of cerci. Accompanying seta 0.3 × the apical seta.

Distribution.

This species has only been collected in the type locality in the Chocoita district of the municipality of Girón in the department of Santander in Colombia.

Etymology.

The specific epithet chocoita refers to the locality, where the type material was collected. Feminine, in agreement with the gender of the genus Hanseniella.

Remarks.

The correct identification of Hanseniella chocoita sp. nov. requires careful examination under microscope due to subtle differences in the chaetotaxy of the antennae with Hanseniella cf. unguiculata. Hanseniella chocoita sp. nov. was collected only during the rainy season when the soil was more humid.