Ea septentrionalis Carvajal & Faúndez & Rider 2014, n.sp.
Creators: name: Carvajal, Máriom A.
name: Faúndez, Eduardo I.
name: Rider, David A.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Acanthosomatidae
Ea
Ea septentrionalis

description: Ea septentrionalis n.sp.
(Figs. 2, 4, 6, 8, 9, 10, 11)
General body shape oval and elongated (Fig. 9). Dorsum light green, uniformly colored, with light brown punctation, ventral portion reddish and yellowish.
Head: green with light brown punctures; paraclypei not surpassing the anteclypeus, lateral margins elevated, apices narrowly rounded, dorsal surface transversally striated with fine punctures (Fig. 2). Anteclypeus rounded in the apex with a few light brown hairs; eyes prominent, reddish; ocelli bright red, located posterior to the eyes, and not contiguous with pronotum; antennae unicolor, yellowish, first antennal segment thick, surpassing the apex of the anteclypeus, second segment longer than the third, fourth and fifth segments subequal; rostrum reaching the midcoxae, first segment at level with bucculae.
Thorax: Pronotum trapezoid with denser punctuation in the middle than in the sides, humeral angles rounded, slightly projected (Fig.2), cicatrices immaculate; scutellum isosceles triangle shaped with uniform thick punctures; clavus with three lines of punctures parallel to the lateral margin of the scutellum; Hemelytra: Corium divided in two puncture design sections, the inner section with thicker punctures and the outer section weaker punctures; membrane slightly yellowish. Metapleuron: Ostiole elongated transversally, ostiolar peritreme fleshy making look the ostiole like a triangle, evaporatorium reddish, diagonally striated, metepimeral pseudosuture smooth, with red and yellow spots; Legs: uniformly yellow-greenish, femora thick, with basal and apical portions constricted, tibiae cylindrical (i.e. without a median sulcus), tarsi bisegmented.
Abdomen: Connexiva rounded, bicolored, each conexival segment reddish, with the anterior portion yellowish; base of the abdomen with a small tubercle, reaching but not surpassing metacoxae; ventral surface yellowish-green with a bright red zig-zag designed border around it that does not cover the spiracles; spiracles light brown colored; two pairs of Pendergrast’s organs, located on 6th and 7th sternite on each side, not contiguous.
Male genitalia: Posterior margin of pygophore bilobed (Fig. 4), lateroposterior sides wide and proyected (Fig. 4), presence of a pack of light brown pilosity on its middle border. Parameres lanceolated (Fig. 6), sharpened, wide and pointed apically (Fig. 8) with a median process in the anterior surface; coloration reddish in the base and darkening brown to black in the apex.
Female genitalia (Fig. 10): 1st gonocoxae mostly rectangular shaped, striated diagonally, yellowish in the middle and reddish on the sides. 2nd gonocoxae very small, almost imperceptible, rounded in the apex. Paraterguites 8 rounded, reddish in the inner side and yellowish-green on the outer side with some long light brown hairs. Paraterguites 9 triangular shaped with red and yellow spots.
Measurements (mm; male followed by female in parentheses). Total length:11.21 (10.61); head length: 1.55 (1.52), head width: 2.52 (2.45); antennal segments: I − 0.85, II − 1.55, III − 0.92, IV − 2.23, V: 3.47; rostral segments: I − 1.02, II − 1.18, III − 1.55, IV − 0.61; pronotum length: 2.87 (2.78), pronotum width: 5.34 (5.49); scutellum length: 3.18 (3.33), scutellum width: 2.85 (2.96).
Etymology: from the latin septentrionalis which means northern. This name has been assigned to this species because of its distribution. The type species of the genus has been named australis, which means southern, and matches with its distribution in the Austral Chilean and Argentinean Patagonia. This new species, however, is distributed in a more northern location in Chile.
Holotype: Chile: Ñuble Province, Shangri-La, SW side of Volcan Chillan, 1600m.; 19-21- I-1979; Leg. D & M Davis & B. Akerbergs 1J. USNM
Paratypes: CHILE: Bíobío Region: Ñuble Province, Shangri-La, SW side of Chillan Volcano, 1600m.; 19-21-I-1979; Leg. D & M Davis & B. Akerbergs; 10JJ 12♀ [USNM (1 couple MACC)]. Shangri-La, Las Trancas, Cordillera de Ñuble, 1600m.; 19-22-I-1979; Leg. L.E. Peña; 2JJ 1♀ [USNM]. Ñuble Province: Volcán Chillán, Las Cabras; 1480m.; 12-X-1954; Leg. L.E. Peña; 1J 1♀, [USNM]. Araucanía Region: Pino Hachado, 1800-2000m.; 6-10-I-1959; Leg. L.E. Peña; 2JJ [DARC]. Termas de Tolhuaca; I-1959; Leg. L.E. Peña; 1♀ [DARC].
Discussion: This species can be differentiated from Ea australis because of the shape of pronotum which is larger and wider; with sides more inclined in Ea septentrionalis (see figs. 1 and 2). The pygophore in ventral view is wider with lateroposterior edges convex in Ea septentrionalis (Fig. 4); whereas this structure is compact with lateroposterior edges nearly straight in Ea australis (Fig. 3). The same structure is wide in caudal view with parameres occupying a bigger relative area in Ea septentrionalis (Fig. 6); whereas the pygophore is more compact and truncate, with parameres occupying a less relative area in Ea australis (Fig. 5). The parameres are lanceolated with a wide apex and having a process in the apex that looks like a spine oriented backwards in Ea septentrionalis (Fig. 8); whereas the parameres are lanceolated, without a wide apex and without any process in Ea australis (Fig. 7).
description: Published as part of Carvajal, Máriom A., Faúndez, Eduardo I. & Rider, David A., 2014, New data on the genus Ea distant, 1911 (Hemiptera: Heteroptera: Acanthosomatidae), with description of a new species from Chile, pp. 53-58 in Anales del Instituto de la Patagonia 42 (2) on pages 54-55, DOI: 10.4067/s0718-686x2014000200004, http://zenodo.org/record/15299620