Eusarima ( Eusarima ) boevei, Constant & Pham, 2025

Constant, Jérôme & Pham, Hong Thai, 2025, Issid planthoppers from Bach Ma and Phong Dien in Central Vietnam. (III) Tribe Sarimini (Hemiptera: Fulgoromorpha: Issidae), European Journal of Taxonomy 1025, pp. 1-109 : 63-69

Eusarima ( Eusarima) boevei sp. nov.

urn:lsid:zoobank.org:act:

Figs 31–33

Diagnosis

Eusarima ( Eusarima) boevei sp. nov. can be recognized by the following combination of characters: (1) the frons brown with wide yellowish transverse band on disc ( Fig. 31E); (2) the anterodorsal margin of the gonostyli slightly, evenly convex in lateral view ( G – Fig. 32A); (3) the anal tube in dorsal view ( An – Fig. 32D), elongate (about 2.5 × as long as wide), dorsoventrally flattened, slightly widening from base to level of anal opening in basal ⅓, then evenly tapering to a rounded apex; (4) the dorsal lobe of the periandrium more or less parellel-sided in dorsal view ( dl – Fig. 33A), distally forming a rounded lobe with, on each side, a dorsal spinose process ( dsp – Fig. 33C) upcurved, sinuate in caudal view; (5) the lateroventral processes of the aedeagus ( lvp – Fig. 33F–H) robust and rather short, arising in distal 1 / 6, curved ventrocephalad in lateral view and not surpassing level of 3 / 5 of the aedeagus.

Differential diagnosis

Eusarima ( Eusarima) boevei sp. nov. can be separated from E. ( Eusarima) bachmana sp. nov. by its frons brown with a transverse yellowish band (uniformly yellow-brown in the latter) and its shorter lateroventral processes of the aedeagus not surpassing 3 /5 of aedeagus length (reaching to at least halflength of the aedeagus in the latter); it can be separated from E. ( Eusarima) bourgoini sp. nov. by the lateroventral processes of the aedeagus, much longer, reaching the base of the aedeagus in the latter species, which additionally doesn’t show a yellowish band of the frons.

Etymology

The species epithet is a patronym dedicated to Dr Jean-Luc Boevé (RBINS) in acknowledgement of his support to the work of the authors over the years.

Type material

Holotype

VIETNAM • ♂; [Thừa Thiên-Huế Province], Bach Ma National Park ; 16°12′ N, 107°52′ E; [ 1300– 1400 m a.s.l.]; 15–16 Jul. 2011; J. Constant and J. Bresseel leg.; summit, daytime collecting; I.G.: 31.933; RBINS.

Description

MEASUREMENTS AND RATIOS. LT: ♂ (n = 1): 5.9 mm; LT/BB = 1.79; LTg/BTg = 2.16; LW/BW = 1.21; BV/ LV = 2.00; LF/BF = 0.90.

HEAD. ( Fig. 31A–E). Vertex brown, paler in posterior angles, with fine, yellowish, obsolete median carina; 2.0 × as broad as long in midline, slightly constricted in middle; disc weakly concave; anterior margin angularly projecting anteriad (widely obtuse angle); posterior margin rather deeply concave; all margins carinate. Frons brown with wide yellowish transverse band on disc; weakly convex, smooth with distinct median carina reaching dorsal margin above but not reaching fronto-clypeal suture; peridiscal carina distinct nearly down to fronto-clypeal suture, crossing median carina slightly under dorsal margin; numerous yellowish tubercles along lateral margins; dorsal margin more or less straight (weakly convex in middle portion); widest at level of antennae. Genae yellow-brown, paler than frons, with anteroventral angle weakly projecting anteriad; ocelli present. Clypeus coloured as frons, apex slightly darker; subtriangular, convex, smooth, with small basal median hump but not keeled or carinate, with fronto-clypeal suture curved. Labium yellow-brown with last segment longer than broad, shorter than penultimate. Antennae with scape short, ring-shaped, yellow-brown, and pedicel bulbous, yellow-brown with distinct basal black incomplete ring.

THORAX ( Fig. 31A, C–E). Brown. Pronotum with weak, paler median carina; subtriangular, projecting anteriorly; smooth with anterior margin carinate and pair of impressed points on each side of midline; lateral fields with some paler tubercles, and very narrow behind eyes; paranotal lobes yellowish brown, turning dark brown along lateral margin, with posteroventral angle rounded. Mesonotum with median and peridiscal (sublateral) carinae distinct and slightly paler, smooth, weakly convex with shallow depression before paler scutellum. Tegulae brown.

TEGMINA ( Fig. 31A–D). Uniformly brown with main veins more or less concolourous (sometimes darker), elevated, and cross-veins weakly raised and paler than background; distinctly convex, and about 2.2 × as long as wide, with weak lateral hump including vein ScP+RA slightly before basal ⅓, not hiding broadly rounded lateral margin in dorsal aspect; apical margin rounded; no distinct epipleuron; clavus closed, reaching to slightly beyond ¾ of tegmen length. Venation: ScP+R rather short; ScP+RA long, curved, reaching external margin of tegmen around distal 1 /5 of tegmen length; RP unforked, long and weakly curved; first fork of MP and CuA slightly before halflength, with first fork of CuA slightly more distal; MP1 with two terminales; Pcu and A1 fused at about 3 /5 of length of clavus, Pcu+A1 reaching apex of clavus; cross-veins numerous.

HIND WINGS ( Fig. 31F). Blackish brown, turning slightly darker in distal portion, and with paler area along costal margin, before midlength; veins generally darker than background; well developed, with three distinct lobes ( Sarimini type) more or less equal in width; indentation between ScP-R-MP-Cu and Pcu-A1 lobes moderately deep. Venation: ScP+R and CuA furcate; MP simple, sinuate; second branch of CuA fused distally with CuP; Pcu and A1 fused on basal half, Pcu unforked and A2 simple; one transverse vein between second branch of ScP+R and MP, and between MP and first branch of CuA.

LEGS ( Fig. 31A–E). Yellow brown, slightly paler than tegmina; all spines of posterior legs black apically. Anterior and median legs slightly flattened dorsoventrally, tibiae more slender than corresponding femora; posteroventral margin of pro- and mesofemora with row of minute teeth; pro- and mesotarsi moderately elongate. Metatibiae with two lateral spines in distal half, and six apical spines. Metatarsi rather short with first segment about as long as combined length of remaining segments. First metatarsomere with two latero-apical and six intermediate spines arranged in arc. Metatibiotarsal formula: (2) 6/ 8/ 2.

ABDOMEN ( Fig. 31B). Yellow-brown with median portion darker.

MALE TERMINALIA ( Figs 32–33). Pygofer ( Py – Fig. 32A–D) short, about 2.4 × as high as long at midheight in lateral view, with posterior margin rounded in lateral view; in caudal view suboval, 1.3 × as high as wide; dorsally deeply notched. Gonostyli ( G – Fig. 32A–D) relatively massive, moderately convex, with anterodorsal margin slightly, evenly convex, then upcurved at base of capitulum; ventral margin slightly rounded with posterior angle rounded; posterodorsal margin roundly projecting caudad into a posterior lobe in lateral view, forming obtuse angle, and with second obtuse angle more dorsad (curved cephalad) at base of capitulum in lateral view; capitulum ( ca – Fig. 32A–C) rather slender in lateral view and anteroposteriorly flattened, projecting anterodorsad and with moderate neck, apical point directed cephalad, in lateral view, posterior margin extending ventrad and curved to reach apex of basilateral spine curved lateroventrad; inner margin distinctly rounded in caudal view. Anal tube ( An – Fig. 32A–D) distinctly elongate, dorsoventrally flattened, slightly widening from base to level of anal opening, then slightly, evenly tapering to round apical margin, and about 2.5 × as long as wide in dorsal view, anal opening in basal ⅓; in lateral view abruptly narrowing at anal opening, then weakly sinuate, more or less straight in distal portion. Aedeagus ( ae – Figs 32E–L, 33) symmetrical, elongate, distinctly curved posterodorsad in lateral view. Ventral lobe of periandrium ( vl – Figs 32G–L, 33A–E) laminate, slightly tapering towards spatulate distal portion, with apical margin slightly notched; slightly shorter than dorsal lobe and aedeagus sensu stricto. Dorsal lobe of periandrium ( dl – Figs 32E–L, 33A–E) more or less parellel-sided in dorsal view, distally forming rounded lobe with, on each side, dorsal spinose process ( dsp – Figs 32E–F, H–I, L, 33A–E) upcurved, sinuate in caudal view; basally to spinose process, reflexed lobe developed mesoventrad and partly conceiling ventral lobe ventrally. Aedeagus (sensu stricto, ae – Figs 32E–L, 33F–H) surpassing spinose processes of periandrium, bifid, each shaft more or less parallel-sided to obliquely truncate apex; lateroventral processes ( lvp – Figs 32G–L, 33F–H) robust, rather short (⅓ of length of aedeagus), arising in distal 1 / 6 and not surpassing level of 3 / 5 of aedeagus, curved ventrocephalad in lateral view, moderately sinuate (inflated then strongly curved laterad basally) in caudal view, moderately elongate and rather abruptly tapering towards pointed apex in distal portion. Connective ( co – Fig. 32H) well developed, corpus connective long, slender, weakly curved in lateral view, tectiductus ( te – Fig. 32H) moderately developed, conical with anteroventral apodemes and wide anterior foramen.

Biology

Eusarima boevei sp. nov. was collected in July at altitudes between 1300 and 1400 m a.s.l., in moist evergreen tropical forest. The specimen was collected by sweeping lower vegetation and bushes. In Bach Ma National Park, it was found at the following collecting site/ habitats ( Constant & Pham 2025a: fig. 2a): “summit” ( Constant & Pham 2025a: figs 2a(5), 4b).

Distribution

Vietnam: Thừa Thiên-Huế Province, Bach Ma National Park ( Fig. 33I).