Corethrella doryphallica Amaral & Pinho, 2025

Corethrella doryphallica Amaral & Pinho sp. nov.

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Figs. 5–6 View FIGURE 5 View FIGURE 6

Type material. Holotype: ♂ adult: CUBA, Guantanamo province, Baracoa Municipality, Alejandro de Humboldt National Park, Monte Iberia , “Pez Pega” stream, site 2, 20°29'44"N, 74°43'32"W. Malaise trap. 29–31.X.2015, Orestes Bello-González leg. (Cuba05) ( PERC) GoogleMaps . Paratypes: ♂ adult: as holotype, except: Forest, site 4, 20°28'57"N, 74°43'17"W. (Cuba06) ( PERC) GoogleMaps ; ♂ adult: as holotype, except: 20°27'22.30"N, 74°44'16.88"W, VI.2017. (Cuba23) ( CEMHS) GoogleMaps ; ♂ adult: as previous, except: (Cuba27) ( CEMHS) .

Etymology. The specific name is a combination of the ancient Greek words for spear, dory, and phallus, referring to the pointed tip of the aedeagus.

Diagnosis. Adult male. Only extant species of Corethrella with posterior anepisternum undivided, dorsoventrally elongate ( Fig. 5C View FIGURE 5 ); wing with non-marginal veins with only setae ( Fig. 5D View FIGURE 5 ); vein R 2 about same length or longer than R 2+3; R 2 reaching C near anterior margin of wing; aedeagus strongly tapered subapically, with pointed apex ( Fig. 6E View FIGURE 6 ).

Description

Adult male (n = 4).

Head ( Fig. 5A View FIGURE 5 ). Dark brown. Outline of head in anterior view laterally elongate; head W/L 1.34–1.59. Coronal suture complete, reaching ventral margin of interocular space ( Fig. 6A View FIGURE 6 ). Clypeus nearly square, 0.88–1.12 times as wide as long, with 1–3 dorsal setae. Palpus more lightly pigmented than head; third segment clavate; about 1.14 length of fifth. Mandible, lacinia weakly sclerotized, with smooth margins. Antenna ( Fig. 5A View FIGURE 5 ): pedicel dark brown, with at least one thicker, distinctive elongate dorsal seta; flagellum more lightly pigmented than head; flagellomeres I–III moderately elongate, XI–XIII elongate; flagellomere XIII with apical bifurcation. Sensilla coeloconica distribution: 1(X–XIII), 2(I). Cranial sensilla ( Fig. 6A View FIGURE 6 ): Ocular row with 1 thick offset seta at ventral part; 12–13 thick setae extending shortly beyond vertex; vertex with few setae. Subocular row inconspicuous. Postgenal row with 9–13 intermediate setae. With 1 ventromedial thick seta.

Thorax ( Fig. 5C View FIGURE 5 ). Medium/dark brown. Prescutal suture short, ending halfway towards dorsocentral row of setae ( Fig. 6B View FIGURE 6 ). Anterior anepisternum divided longitudinally by sinuous suture. Posterior anepisternum undivided, dorsoventrally elongate. Sensilla ( Fig. 6B View FIGURE 6 ): Antepronotum with about 3 intermediate setae anteriorly. Postpronotum with 1 thick dorsal and 2 more posterior intermediate setae. Scutum, prescutal area, with 2 thick setae, about 4 intermediate/slender more anteriorly. Antealar area with 1 thick seta near prescutal suture, with 4 thick setae on posteroventral region and about 20 slender/intermediate setae spread from ventral to dorsal portions. Supraalar area with 2 thick setae longitudinally aligned; 2–3 slender setae surrounding. Dorsocentral row, posterior part with 2 thick setae; about 20 thick, 20 slender/intermediate setae completing the row. Scutellum with 6 thick setae. Posterior anepisternum with 2–3 intermediate setae dorsally. Anepimeron with 1 slender seta.

Wings ( Fig. 5D View FIGURE 5 ). Medium brown, without any pattern of pigmentation. Non-marginal veins with setae. Apex of R 2 basal to apex of M 1. Halter as dark as scutellum. Wing length 1.03–1.10 mm. R 3 /R 1: 0.45–0.53. R 2+3 /R 2: 0.78–1.04.

Legs ( Fig. 5B View FIGURE 5 ). Medium brown; hind femur with basal 0.6 pale; hind tibia uniformly pigmented. Legs without scales. Midleg tarsomeres 1–3 with thick subapical setae. Tarsal claws on foreleg unequal; mid-, hind leg equal; apically inserted. Empodium thick; intermediate length; with 6 bifid branches ( Fig. 6C View FIGURE 6 ). Apices of fore-, midtarsi not bilobed. Ta1/Ta2: 2.40–2.90. Ta3/Ta4: 1.15–1.48.

Abdomen ( Fig. 5E View FIGURE 5 ). Medium brown, with posterior portion of segment 8 pale.

Genitalia ( Fig. 5E View FIGURE 5 ). Gonocoxite ( Fig. 6D View FIGURE 6 ) uniformly medium brown, elongate; without distinctively elongate spicules on anteromedial area; dorsomedial row well-defined. With 5 dorsal to dorsomedial setae, somewhat thicker than other setae on gonocoxite, strongly tapering distally. With 1 dorsomedial stout seta, tapering from base, located at 0.46 gonocoxite length from base; without sclerotized plate at base. Gonostylus slender, curved subapically; subbasal seta stout, simple; dorsally located. Apical seta peg-shaped, blunt, squat (with its length only slightly exceeding its diameter). Aedeagus slender, tapering from base, with pointed apex; margins fused apically ( Fig. 6E View FIGURE 6 ).

Adult female: Unknown

Immatures: Unknown

Remarks. This species keys to the couplet 30 - C. yucuman Caldart & Pinho in Amaral et al. (2023), but differs in the following traits: vein R 2 longer than, or subequal to R 2+3; the apex of CuP discretely distal to the base of M 4; and the presence of a sensillum coeloconicum on the tenth flagellomere. Corethrella doryphallica sp. nov. shares synapomorphies with species in the rotunda group proposed by Borkent (2008). These are: the posterior anepisternum undivided (unique apomorphy), wing without pattern of pigmentation (homoplastic), and non-marginal veins with only setae (without scales). The latter only occurs in the clade composed of C. kerrvillensis (Stone) , C. remiantennalis Borkent , C. blandafemur Borkent , C. brevivena Borkent , and C. globosa Borkent , plus the unplaced but probably related species, C. yucuman Caldart & Pinho and C. xokleng Amaral, Pinho & Mariano.