Mitrapsylla didyma Rendón-Mera & Burckhardt & Cavichioli & Queiroz 2020, sp. nov.
Creators: name: Rendón-Mera, Diana Isabel
name: Burckhardt, Daniel
name: Cavichioli, Rodney R.
name: Queiroz, Dalva L.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Psyllidae
Mitrapsylla
Mitrapsylla didyma

description: Mitrapsylla didyma sp. nov.
(Figs 114, 144, 174, 226 ‾228, 294, 324, 354, 376)
LSID: urn:lsid:zoobank.org:act: A80C3490-15DB-4AE9-92A1-14F4D4EFF011
Material examined. Holotype ♁, Brazil: Ceará, Parque Nacional de Ubajara, Tianguá, Torres, -3.7983, -40.9050, 880 m, 6.vii.2016, Indigofera suffruticosa (D. Burckhardt & D.L. Queiroz), #220(9) (DZUP 215409, dry).
Paratypes. Ceará: 1 ♁, 4 ♀, same data as holotype (D. Burckhardt & D.L. Queiroz), #220(9) (DZUP, NHMB, dry); 2 ♁, 1 ♀, Frecheirinha to Tianguá, -3.7283, -40.8417, 180 m, 4.vii.2016, Mimosa tenuiflora (D. Burckhardt & D.L. Queiroz), #215(1) (NHMB, 70% ethanol); 2 ♁, 2 ♀, 1 immatures, ICMBIO headquarters, -3.8383, -40.9400, 860 m, 2–7.vii.2016, Desmodium album (D. Burckhardt & D.L. Queiroz), #212(9) (NHMB, 70% ethanol).— Piauí: 1 ♁, 1 ♀, Parnaíba, Embrapa Meio-Norte, -3.0850, -41.7867, 60 m, 27–30.vi.2016, Copaifera cearensis (D. Burckhardt & D.L. Queiroz), #207(1) (NHMB, 70% ethanol); 11 ♁, 2 ♀, Piripiri, Caldeirão, -4.3333, -41.7317, 170 m, 23.vi.2016 (D. Burckhardt & D.L. Queiroz), #204(-) (NHMB, 70% ethanol).
Diagnosis. Genal process, in dorsal view, subconical, rarely expanded; with subacute, acute or rarely rounded apex; GL/VL 0.5–0.6. Surface spinules absent or much reduced around radular areas of cells m 1, m 2 and cu 1. Paramere, in lateral view, clavate, weakly or moderately expanded apically; anterior margin strongly sinuous, broadly rounded in apical third; posterior margin angulate and expanded in apical third; apex irregularly rounded to subtrun-cate, slightly to strongly directed posteriorly; sclerotised ridge medially. Aedeagus complex unipartite; in lateral view, ventral process with apical expansion larger than dorsal lobe.
Description. Colouration. Body with white striped-pattern, usually faint in genal process and thorax; variation: mesoscutellum usually with an additional stripe along anterior margin or with an irregular pattern; older specimens with markings with dark outline. Head and thorax light yellowish-brown to brownish-orange; genal process lighter than head. Eye grey to dark red; ocelli colourless to orange. Antenna light yellow, segments 1–2 concolorous with head. Clypeus concolorous with body; rostrum light yellow. Thorax with margins of sclerites darker. Metascutellum sometimes almost completely white. Forewing colourless to slightly yellowish, sometimes slightly darker around Cu 1b; veins light yellow to light yellowish-brown; pterostigma concolorous or slightly lighter than veins. Hindwing colourless. Fore- and midleg concolorous to darker than body, hindleg lighter than rest of legs. Abdomen light yellowish-brown to light orange-brown; intersegmental membranes light straw-coloured; spiracular sclerites concolorous with tergites. Male terminalia yellowish-brown. Female terminalia light yellow, proctiger brown apically.
Structure. Body length ♁ 2.2–2.3 mm (2.26± 0.02 mm), ♀ 2.2–2.3 mm (2.24± 0.11 mm) (5 ♁, 2 ♀). Genal process (Fig. 144) subconical, rarely expanded, irregularly narrowing towards subacute, acute or rarely rounded apex, 0.5–0.6 times as long as vertex along midline. Antenna 1.9–2.3 times as long as head width; longest terminal seta slightly shorter than segment 10. Apical labium segment 0.2 times longer than head width and 0.8–0.9 times longer than median segment. Forewing (Fig. 174) 2.8–2.9 times as long as head width, 2.2–2.3 times as long as wide, obovoid or suboval, broadly or slightly narrowly rounded apically; vein M+Cu 1 0.4 times as long as Cu 1; ratio a/b 1.5–1.7; ratio c/d 0.7–0.8; ratio e/f 0.5–0.9. Surface spinules distinctly (Fig. 38) to moderately (Fig. 39) spaced, forming rhomboids; covering apical half of cell r 1, apical third of cell r 2, absent or much reduced around radular areas of cells m 1, m 2 and cu 1, covering m 2 basally, and most of cell cu 2; leaving spinule-free spaces along veins (Fig. 42). Radular spinules sometimes present in r 2 but inconspicuous. Metatibia 0.8–0.9 times as long as head width.
Terminalia. Male. Proctiger, in lateral view, 0.4 times as long as head width; with long, strongly tapered, strongly down-curved posterior lobe. Paramere, in lateral view (Figs 226 ‾228) 0.8 times as long as proctiger; clavate, weakly to moderately expanded apically; anterior margin strongly sinuous, broadly rounded in apical third; posterior margin angulate and expanded in apical third, weakly convex in basal two thirds; apex irregularly rounded to subtruncate, slightly to strongly directed posteriorly, with sclerotised ridge medially (Fig. 227); inner surface (Fig. 227) covered with short setae, longer basally and along posterior margin, with row of thick setae along apical anterior margin, several thick setae below sclerotised ridge, and group of stout setae on apical posterior margin; in dorsal view (Fig. 294), sclerotised ridge irregularly straight, bearing posterior tooth. Aedeagus (Fig. 228) complex unipartite; in lateral view, dorsal lobe obovoid; ventral process relatively straight to upturned, with apical expansion larger than dorsal lobe, globular, bearing short, conical tubercle.—Female (Fig. 324). Proctiger, in lateral view, 1.0 times as long as head width; dorsal outline weakly to moderately concave distal to circumanal ring, apical extension sinuous, apex slightly upturned, obliquely rounded; circumanal ring 0.3 times as long as proctiger. Subgenital plate, in lateral view, 0.5 times as long as proctiger; apex well-developed; ventral outline irregularly straight to sinuous, sometimes slightly notched medially; covered with medium long setae in median third and ventrally throughout, short setae in apical third, long setae at apex, and group of long setae on dorsum subapically, with seta-free patch subapically; in ventral view (Fig. 354), lateral margins abruptly narrowing at half, with apical half weakly narrowing towards slightly broad, rounded apex.
Measurements (in mm) (4 ♁, 2 ♀). HW ♁ 0.56–0.60 (0.57±0.02), ♀ 0.55–0.56 (0.55±0.01); AL ♁ 1.16–1.27 (1.22±0.05), ♀ 1.16–1.19 (1.17±0.02); LAB2 ♁ 0.14–0.15 (0.15±0.01), ♀ 0.14–0.15 (0.14±0.01); LAB3 ♁ 0.11– 0.13 (0.12±0.01), ♀ 0.12; FL ♁ 1.65–1.67 (1.66±0.01), ♀ 1.54–1.60 (1.57±0.04); TL ♁ 0.46–0.49 (0.47±0.01), ♀ 0.42–0.44 (0.43±0.01); MP 0.23–0.25 (0.24±0.01); PL 0.19–0.21 (0.20±0.01); DL 0.26; FP 0.56–0.57 (0.56±0.01).
Etymology. From Greek δίδυμος = double, twofold, twain, referring to its similarity to M. cubana.
Distribution. Brazil: Ceará, Piauí.
Host-plant. Desmodium album (Schindl.) J.F. Macbr. (Leguminosae, Papilionoideae, Desmodieae).
Habitat. Unknown.
Comments. Mitrapsylla didyma sp. nov. resembles M. cubana Crawford in the body dimensions, the genal process subconical with subacute or acute apex, and the paramere weakly expanded apically in lateral view, with sclerotised ridge medially; but differs in the anterior margin of the paramere broadly rounded in apical third (rather than weakly rounded), and the surface spinules absent or very scattered around radular areas of cells m 1, m 2 and cu 1. It also resembles M. aeschynomenis sp. nov. and M. aurantia sp. nov. (see comments under each species).
description: Published as part of Rendón-Mera, Diana Isabel, Burckhardt, Daniel, Cavichioli, Rodney R. & Queiroz, Dalva L., 2020, Taxonomy and host-plant relationships of the psyllid genus Mitrapsylla (Hemiptera: Psylloidea: Psyllidae) in Brazil, pp. 1-100 in Zootaxa 4887 (1) on pages 37-38, DOI: 10.11646/zootaxa.4887.1.1, http://zenodo.org/record/4297565