Civetissus pagumoides, 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 : 50-57

Civetissus pagumoides gen. et sp. nov.

urn:lsid:zoobank.org:act:

Figs 23–27

Diagnosis

Civetissus pagumoides gen. et sp. nov. is the only species in the genus Civetissus gen. nov. The contrasted markings of the head and other parts of the body and the characters of the male terminalia, are probably relevant diagnostic features to recognize the species, e.g., the elongate, tapering anal tube in dorsal view, the shape of the gonostyli, including the capitulum in lateral view, the shafts and dorsal fin-shaped process of the periandrium, and the size and shape (curvature) of the lateroventral processes of the aedeagus ( Figs 23–26).

Differential diagnosis

The most similar species belong to the genus Pseudocoruncanius Meng, Qin & Wang, 2020 , from which C. pagumoides gen. et sp. nov. can be separated by the characters given above for the genus.

Etymology

The species epithet ‘ pagumoides ’ is derived from to the civet genus Paguma Gray, 1831 ( Mammalia: Carnivora : Viverridae ) and refers to the colouration of the head of the planthopper (dark brown/ black with pale median line) which is reminiscent of the head of the masked palm-civet, Paguma larvata (Hamilton-smith, 1827).

Type material

Holotype

VIETNAM • ♂; Th ừa Thiên-Huế Province; 16°13′38″ N, 107°51′20″ E; 500–600 m a.s.l.; 10–20 May 2023; J. Constant and L. Semeraro leg.; pheasant trail; VNMN.

Paratypes

VIETNAM – Th ừa Thiên-Huế Province • 1 ♂, 1 ♀; same data as for holotype; I.G.: 34.640; RBINS • 1 ♂; Nam Dong District, Bach Ma National Park , ranger station; 16°08′37″ N, 107°49′36″ E; 150– 500 m; 19 Oct. 2024; J. Constant, L. Semeraro, T. T. H. Nguyen leg.; I.G.: 34.893; RBINS • 2 ♀♀; Bach Ma National Park, YesHue Eco ; 16°13′05″ N, 107°43′27″ E; 200–300 m a.s.l.; 17 May 2023; J. Constant and L. Semeraro leg.; VNMN .

Description

MEASUREMENTS AND RATIOS. LT: ♂ (n = 3): 6.4 mm (6.3–6.5), ♀ (n = 3): 7.3 mm (7.2–7.5); LT/BB = 2.48; LTg/BTg = 2.44; LW/BW = 1.31; BV/LV = 0.92; LF/BF = 0.94.

HEAD ( Figs 23A–E, 27). Vertex brown to blackish brown with distinct median line yellowish white to pale red; triangularly projecting anteriad with narrowly rounded apex; 1.1 × as long in midline, as broad, more or less flat with obsolete median carina; posterior margin distinctly concave; all margins weakly carinate. Frons with lower portion and fine line under dorsal margin, pale yellowish or reddish, and upper portion blackish brown, convex, oblique in lateral view, narrowly visible from above, about 1.1 × as wide as long in midline, smooth without median carina, and with peridiscal carina obsolete; maximum breadth slightly above level of antennae; dorsal margin strongly projecting anteriad in subtriangular process. Genae concolourous with frons, lower portion pale and upper portion, down to lower margin of eye, blackish; anteroventral angle distinctly projecting anteriad, anterior margin slightly carinate under eye; narrow groove between eye and margin stopping under ocellus. Clypeus dark brown with basal portion narrowly yellowish, to completely black, triangular, convex, smooth, not keeled or carinate. Labium yellowish, with last segment longer than broad, shorter than penultimate. Antennae black with scape short, ring-shaped, and subcylindrical, barrel-shaped pedicel.

THORAX ( Figs 23A, C–E, 27). Pronotum brown to blackish with distinct median line and often small blunt tubercles, yellowish white to pale red; transverse with anterior margin rounded and posterior margin slightly bisinuate, about 0.55 × as long in midline, as mesonotum; smooth with anterior margin finely carinate and pair of weak impressed points on each side of median line; lateral fields very narrow behind eyes; paranotal lobes black without tubercles /carinae, and with posteroventral angle angularly rounded. Mesonotum brown to blackish with distinct median line yellowish white to pale red; subtriangular with posterolateral margins slightly incurved, smooth, weakly convex with shallow depression before scutellum; no distinct carinae. Tegulae yellowish.

TEGMINA ( Figs 23A–D, 24A–B, 27). Brown to blackish or reddish brown, with darker poorly defined band along costal margin, and latter narrowly pale yellowish along basal 4 /5; apical cells with more or less elongate black marking (veins paler), often missing in cubital area; veins more or less concolourous, vein A1-Pcu+A1 often black. Convex, elongate, about 2.4 × as long as wide, with longitudinal veins elevated and cross-veins weakly elevated; costal margin forming a broadly rounded angle at basal 2 /5; slightly tapering in distal 3 /5, apical margin obliquely rounded; distinct lateral hump including vein ScP+RA around basal ¼, hiding costal margin in dorsal aspect; costal margin more or less hidden by vein RP in distal ¾, in dorsal view; distinct epipleuron; clavus closed, reaching about ¾ of tegmen length. Venation as in genus description.

HIND WINGS ( Fig. 23F). Blackish brown, turning slightly darker in distal portion; veins generally darker than background, with red portions; 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 as in genus description.

LEGS ( Figs 23A–E, 24C–D, 27). Femora black with more or less distinct preapical pale ring; tibiae and tarsi yellowish white, pro- and mesotibiae with basal spot, ring before half length and apex, black, metatibiae black in basal portion; all spines of posterior legs black apically. Legs rather short, slender, with pro- and mesofemora and pro- and mesotibiae slightly flattened dorsoventrally, tibiae distinctly more slender than corresponding femora; posteroventral margin of pro- and mesofemora with row of minute teeth; pro- and mesotarsi elongate and slender. Metatibiae slightly curved with two lateral spines in distal half and eight apical spines. Metatarsi moderately elongate with first segment about as long as combined length of remaining segments. First metatarsomere with two latero-apical and seven intermediate spines arranged in arc ventrally. Metatibiotarsal formula: (2) 8/ 9/ 2.

ABDOMEN ( Fig. 23B). Yellowish brown with basal area of segments darker.

MALE TERMINALIA. Pygofer ( Py – Fig. 25A–D) short, about 2.8 × as high as long at midheight in lateral view, with posterior margin bisinuate, with distinct angle dorsally, and anterior margin distinctly incurved; in caudal view suboval, 1.4 × as high as wide; hind margin dorsally deeply and widely notched. Gonostyli ( G – Fig. 25A–D) rather large, moderately convex, with posterior margin roundly projecting caudad in a short lobe in lateral view, with dorsal portion of hind margin sinuate, and anterodorsal margin distinctly angularly (right angle) rounded; capitulum ( ca – Fig. 25A–B, D) rather short and distinctly curved anterodorsad in lateral view, curved mesad in caudal view, distally laminate antero-posteriorly with distinct neck and lateral hook pointed lateroventrad. Anal tube ( An – Fig. 25A–D) elongate, about 2.5 × as long in midline, as wide, dorsoventrally flattened, widening from base to around anal opening, slightly grooved in midline and tapering in distal portion in dorsal view (lateral margin broadly rounded); in lateral view, slightly downcurved. Aedeagus ( Figs 25E–L, 26) elongate, symmetrical, moderately curved posterodorsad in lateral view; base of periandrium dorsally with laminate projection directed caudad. Ventral lobe of periandrium ( vl – Figs 25G–L, 26A–D) laminate, widening basally on short distance, then tapering, constricted in middle portion, and spatulate in distal portion with rounded apical margin notched in middle. Dorsal lobe of periandrium ( dl – Figs 25E–L, 26A–D) elongate, deeply notched apically and with strong median carina (fin-shaped) raised at right angle basally, then rounded to oblique slope towards the posterior; elongate shaft ( sp – Figs 25E–L, 26A–D) arising apically, directed laterally and strongly recurved cephalad in basal portion, more or less straight, dorsally irregularly dentate and with distal portion spatulate, moderately widening and upcurved. Aedeagus (sensu stricto, ae – Figs 25F–G, I, L, 26E–G) very elongate, bifid from basal portion and more or less roundly truncate apically, with pair of elongate, shaft-like, lateroventral processes ( lvp – Figs 25E–L, 26E–G) arising at about distal ⅔ of length, directed cephalad and curved mesodorsad in distal portion, and reaching to base of periandrium. Connective ( co – Fig. 25G) well developed, corpus connective long, straight in lateral view, tectiductus ( te – Fig. 25G) well developed, conical with anteroventral apodemes and wide anterior foramen.

Biology

Civetissus pagumoides gen. et sp. nov. was collected in the months of May and October at altitudes between 150 and 600 m a.s.l., in moist evergreen tropical forest. The specimens were sitting on small branches and leaves, on lower vegetation and bushes. In Bach Ma National Park, it was found at the following collecting site/habitats ( Constant & Pham 2025a: fig. 2a): “Yes Hue Eco” ( Constant & Pham 2025a: fig. 2a(1), b), “pheasant trail” ( Constant & Pham 2025a: figs 2a(2), 3a), and “ranger station” ( Constant & Pham 2025a: figs 2a(6), 5a).

Distribution

Vietnam: Thừa Thiên-Huế Province, Bach Ma National Park ( Fig. 26H).