Taxonomy and host-plant relationships of the psyllid genus Mitrapsylla (Hemiptera: Psylloidea: Psyllidae) in Brazil Author Rendón-Mera, Diana Isabel Author Burckhardt, Daniel Author Cavichioli, Rodney R. Author Queiroz, Dalva L. text Zootaxa 2020 2020-11-30 4887 1 1 100 journal article 9451 10.11646/zootaxa.4887.1.1 dd97793c-f4a6-4204-a111-c112533f9b06 1175-5326 4297565 B9A17D69-EBE7-49F4-AB01-54CA617FED02 Mitrapsylla brevigenis sp. nov. ( Figs 107 , 137 , 167 , 205 ‾207, 287, 317, 347, 374) LSID: urn:lsid:zoobank.org:act: F6111F5E-8628-4BFF-AB86-59145603643C Material examined. Holotype ♁, Brazil : Roraima , Mucajaí , Campo experimental Serra da Prata , Embrapa , 2.3983 , -60.9800 , 90 m , 16–17.iv.2015 , experimental plantations, edges of degraded rain forest, Machaerium cf. hirtum (D. Burckhardt & D.L. Queiroz) , #163(4) ( DZUP 215399 , dry). Paratypes . Roraima : 17 ♁, 29 ♀ , 210 immatures , same data as holotype ( D. Burckhardt & D.L. Queiroz ), #163(4) ( DZUP , NHMB , dry, slide mounted, 70% ethanol); 5 ♁, 4 ♀ , Boa Vista , BR 174 , Igarapé Água Boa bridge, SE Boa Vista , 2.7267 , -60.8100 , 90 m , 2.iv.2015 , degraded Cerrado vegetation, Machaerium cf. hirtum (D. Burckhardt & D.L. Queiroz) , #153(2) ( NHMB , dry, 70% ethanol) . Diagnosis. Genal process, in dorsal view, expanded; apex rounded; GL/VL 0.4–0.5. Paramere, in lateral view, irregularly lamellar; posterior margin subequally expanded in apical third and basal two thirds; apex irregularly rounded, slightly notched medially; in dorsal view, bearing large posterior tooth, slightly directed anteriorly. Aedeagus complex tripartite; in lateral view, lateral lobule subtriangular, strongly truncate apically; ventral process with apical expansion considerably smaller than dorsal lobe. Description. Colouration. Body with white striped-pattern; variation: vertex with stripes along lateral margins absent and along posterior margin sometimes weak; genal process with transversal stripe faint and expanded, covering most of process; mesopraescutum with lateral stripes fused to lateral spots on posterior margin; mesoscutellum usually with an additional stripe along posterior margin; abdominal tergites lacking distinct striped-pattern. Head and thorax pale yellow to yellowish-brown; genal process lighter than head. Eye grey to red; ocelli colourless to orange. Antenna light to dark yellow. Clypeus concolorous or lighter than head, sometimes slightly darker along edges; rostrum dark yellow. Thorax seldom with margins of sclerites darker. Forewing colourless, sometimes slightly yellowish around Cu 1b ; veins light yellowish-brown; pterostigma concolorous or slightly lighter than veins. Hindwing colourless. Fore- and midleg dark yellow, hindleg light yellow. Abdomen light straw-coloured to concolorous with rest of body; intersegmental membranes light straw-coloured; spiracular sclerites concolorous with tergites. Male terminalia light yellow. Female terminalia light yellow, proctiger usually dark yellow apically. Structure. Body length ♁ 2.1–2.4 mm (2.25± 0.10 mm ), ♀ 2.5 mm (2.49± 0.03 mm ) (4 ♁, 4 ♀ ). Genal process ( Fig. 137 ) expanded, evenly or irregularly narrowing towards broadly or narrowly rounded apex, 0.4–0.5 times as long as vertex along midline. Antenna 2.2–2.5 times as long as head width; longest terminal seta about as long as segment 10. Apical labium segment 0.2 times longer than head width and 0.6–0.8 times longer than median segment. Forewing ( Fig. 167 ) 2.6–2.8 times as long as head width, 2.1–2.2 times as long as wide, obovoid, broadly rounded apically; vein M+Cu 1 0.3–0.4 times as long as Cu 1 ; ratio a/b 1.3–1.5; ratio c/d 0.8–0.9; ratio e/f 0.5–1.0. Surface spinules moderately spaced when present, forming rhomboids ( Fig. 39 ); covering cells r 1 and r 2 apically, absent or much reduced around radular areas of cells m 1 , m 2 and cu 1 , covering m 2 basally, and around Cu 2 ; leaving spinule-free spaces along veins ( Fig. 42 ). Radular spinules sometimes present in r 2 but inconspicuous. Metatibia 0.7 times as long as head width. Terminalia. Male. Proctiger, in lateral view, 0.4 as long as head width; with massive, blunt, weakly down-curved posterior lobe. Paramere, in lateral view ( Figs 205 ‾207) 1.0–1.1 times as long as proctiger; irregularly lamellar; anterior margin slightly convex in apical two thirds; posterior margin subequally expanded in apical third and basal two thirds; apex irregularly rounded, slightly notched medially, slightly directed posteriorly; inner surface ( Fig. 206 ) covered with short setae, longer along posterior margin, with row of thick setae along apical anterior margin, several thick setae below sclerotised ridge and group of thick setae on apical posterior margin; in dorsal view ( Fig. 287 ), bearing large posterior tooth, slightly directed anteriorly. Aedeagus ( Fig. 207 ) complex tripartite; in lateral view, dorsal lobe with slightly prominent median lobule; lateral lobule larger than median lobule, subtriangular, strongly truncate apically; membranous pouch stout, elongate; ventral process relatively straight, slender, with apical expansion weak, considerably smaller than dorsal lobe, bearing short, conical tubercle.—Female ( Fig. 317 ). Proctiger, in lateral view, 0.9–1.0 times as long as head width; dorsal outline weakly to moderately concave distal to circumanal ring, apical extension almost straight to slightly sinuous, apex straight to moderately upturned, strongly obliquely truncate; circumanal ring 0.2–0.3 times as long as proctiger. Subgenital plate, in lateral view, 0.5 times as long as proctiger; apex well-developed; ventral outline almost straight to slightly sinuous, sometimes slightly notched subapically; 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. 347 ), lateral margins evenly, strongly narrowing at half, with apical half subparallel basally and strongly narrowing towards narrow, subtruncate apex. Measurements (in mm) (3 ♁, 3 ♀ ). HW ♁ 0.61–0.65 (0.63±0.02), ♀ 0.64–0.70 (0.67±0.03); AL ♁ 1.43–1.44 (1.44±0.01), ♀ 1.51–1.63 (1.59±0.07); LAB2 ♁ 0.15–0.17 (0.16±0.01), ♀ 0.17–0.19 (0.18±0.01); LAB3 ♁ 0.11– 0.12 (0.11±0.01), ♀ 0.12–0.13 (0.13±0.01); FL ♁ 1.63–1.67 (1.65±0.02), ♀ 1.79–1.90 (1.84±0.06); TL ♁ 0.42– 0.45 (0.44±0.02), ♀ 0.46–0.49 (0.47±0.01); MP 0.23–0.24 (0.24±0.01); PL 0.24–0.25 (0.24±0.01); DL 0.29–0.30 (0.30±0.01); FP 0.64–0.67 (0.65±0.02). Etymology. From Latin brevis = short and gena = cheek, referring to the short genal process. Distribution. Brazil : Roraima . Host-plant. Machaerium cf. hirtum (Vell.) Stellfeld (Leguminosae, Papilionoideae , Aeschynomeneae). Habitat. Cerrado, experimental plantations, rain forest. Comments. Mitrapsylla brevigenis sp. nov. resembles M. amazonica sp. nov. and M. cassiae sp. nov. (see comments under each species).