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Gergithus dayi sp. nov., paratype ♀ from Ranong Province (RBINS). A, habitus, dorsal view. B, habitus, ventral view. C, habitus, right lateral view. D, habitus, anterolateral view. E, habitus, perpendicular view of frons. G. dayi sp. nov.) and the frons brown with 2 paler markings in middle of fronto-clypeal suture (frons with red, black and white longitudinal lines in G. dayi sp. nov.). DESCRIPTION. Measurements and ratios: LT: ♂ (n = 1): 5.2 mm; ♀ (n = 6): 5.6 mm (5.3-5.8). LT/BB = 1.2; LV/BV = 0.74; LF/BF = 1.6.

Gergithus dayi sp. nov., paratype ♀ from Ranong Province (RBINS). A, habitus, dorsal view. B, habitus, ventral view. C, habitus, right lateral view. D, habitus, anterolateral view. E, habitus, perpendicular view of frons. G. dayi sp. nov.) and the frons brown with 2 paler markings in middle of fronto-clypeal suture (frons with red, black and white longitudinal lines in G. dayi sp. nov.). DESCRIPTION. Measurements and ratios: LT: ♂ (n = 1): 5.2 mm; ♀ (n = 6): 5.6 mm (5.3-5.8). LT/BB = 1.2; LV/BV = 0.74; LF/BF = 1.6.

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Two new species of the genus Gergithus Stål, 1870 (Issidae, Hemisphaeriini) are described: G. dayi sp. nov. from southern Thailand and G. floreni sp. nov. from northern Borneo. They are compared with the most similar species and with the species living in the same area. Type specimens, details, male terminalia and live specimens are illustrated, an...

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... Figs 1-4 DIAGNOSIS. The species is separated from the other Gergithus species by the colouration of the tegmina with a large black marking on anterior half including a paler transverse marking, and basilateral yellowish marking ( Fig. 1 A, C), the yellowish mesonotum ( Fig. 1 A), and the pattern of the concolorous frons and clypeus with broad median dark red line followed towards the lateral margin by a narrower black line and a white one (Fig. 1 D-E which is separated from G. dayi sp. ...
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... Figs 1-4 DIAGNOSIS. The species is separated from the other Gergithus species by the colouration of the tegmina with a large black marking on anterior half including a paler transverse marking, and basilateral yellowish marking ( Fig. 1 A, C), the yellowish mesonotum ( Fig. 1 A), and the pattern of the concolorous frons and clypeus with broad median dark red line followed towards the lateral margin by a narrower black line and a white one (Fig. 1 D-E which is separated from G. dayi sp. nov. ...
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... Figs 1-4 DIAGNOSIS. The species is separated from the other Gergithus species by the colouration of the tegmina with a large black marking on anterior half including a paler transverse marking, and basilateral yellowish marking ( Fig. 1 A, C), the yellowish mesonotum ( Fig. 1 A), and the pattern of the concolorous frons and clypeus with broad median dark red line followed towards the lateral margin by a narrower black line and a white one (Fig. 1 D-E which is separated from G. dayi sp. nov. ...
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... of the tegmina with a large black marking on anterior half including a paler transverse marking, and basilateral yellowish marking ( Fig. 1 A, C), the yellowish mesonotum ( Fig. 1 A), and the pattern of the concolorous frons and clypeus with broad median dark red line followed towards the lateral margin by a narrower black line and a white one (Fig. 1 D-E which is separated from G. dayi sp. nov. by its clypeus with median line pale yellowish (dark red in G. dayi sp. nov.), the red line of frons limited dorsally by a black line and not reaching dorsal margin (red line reaching dorsal margin of frons in G. dayi sp. nov.), the male terminalia with gonostyli more produced posteriorly (less ...
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... single species of Gergithus, G. niger (Walker, 1857) was recorded from Thailand (based on a junior synonym Hemisphaerius chilocoroides Walker, 1862 -WALKER, 1862) but is separated by its black dorsal colour and its frons without black lines (illustration in GNEZDILOV, 2015, fig. 19); another species, G. ignotus Melichar, 1906 was described from Bago in Myanmar (= Pegu, Burma in MELICHAR, 1906) but it has a black mesonotum (yellowish in Head: vertex subquadrate, about 2/3 as broad as eye in dorsal view; concave with bluntly elevated margins; posterior margin of vertex slightly incurved; disc yellowish with 2 black ...
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... single species of Gergithus, G. niger (Walker, 1857) was recorded from Thailand (based on a junior synonym Hemisphaerius chilocoroides Walker, 1862 -WALKER, 1862) but is separated by its black dorsal colour and its frons without black lines (illustration in GNEZDILOV, 2015, fig. 19); another species, G. ignotus Melichar, 1906 was described from Bago in Myanmar (= Pegu, Burma in MELICHAR, 1906) but it has a black mesonotum (yellowish in Head: vertex subquadrate, about 2/3 as broad as eye in dorsal view; concave with bluntly elevated margins; posterior margin of vertex slightly incurved; disc yellowish with 2 black markings along posterior margin and lateral margins marked with a black line ( Fig. 1 A). Posterior face of head pale yellowish. ...
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... face of head pale yellowish. Genae pale yellowish with median black-brown line starting from ventral margin of eye, narrowing distally and not reaching ventral margin of gena ( Fig. 1 C-D). Frons elongate, broadest near fronto-clypeal suture, narrowing dorsad, about 2.3 times broader along clypeal margin than dorsal; smooth with 2 shallow longitudinal grooves; fronto-genal margins sharply carinate and with ventral half slightly curved; lateral margins marked by a fine dark brown line; disc with rather wide central dark red line reaching dorsal margin, followed towards the exterior by a black, then a pale yellowish line, each about half as wide as central dark red band; black lines following longitudinal grooves ( Fig. 1 C-E). ...
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... margins sharply carinate and with ventral half slightly curved; lateral margins marked by a fine dark brown line; disc with rather wide central dark red line reaching dorsal margin, followed towards the exterior by a black, then a pale yellowish line, each about half as wide as central dark red band; black lines following longitudinal grooves ( Fig. 1 C-E). Frontoclypeal suture straight ( Fig. 1 E). Clypeus triangular, in same plane as frons, with carinate ventral projection pointed distally in anterior view, and rounded in lateral view; anterior face of clypeus concolorous with frons, with lines of frons prolongated on clypeus; sides of clypeus black ( Fig. 1 C-E). Antennae with ...
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... elongate, broadest near fronto-clypeal suture, narrowing dorsad, about 2.3 times broader along clypeal margin than dorsal; smooth with 2 shallow longitudinal grooves; fronto-genal margins sharply carinate and with ventral half slightly curved; lateral margins marked by a fine dark brown line; disc with rather wide central dark red line reaching dorsal margin, followed towards the exterior by a black, then a pale yellowish line, each about half as wide as central dark red band; black lines following longitudinal grooves ( Fig. 1 C-E). Frontoclypeal suture straight ( Fig. 1 E). Clypeus triangular, in same plane as frons, with carinate ventral projection pointed distally in anterior view, and rounded in lateral view; anterior face of clypeus concolorous with frons, with lines of frons prolongated on clypeus; sides of clypeus black ( Fig. 1 C-E). ...
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... following longitudinal grooves ( Fig. 1 C-E). Frontoclypeal suture straight ( Fig. 1 E). Clypeus triangular, in same plane as frons, with carinate ventral projection pointed distally in anterior view, and rounded in lateral view; anterior face of clypeus concolorous with frons, with lines of frons prolongated on clypeus; sides of clypeus black ( Fig. 1 C-E). Antennae with scape short, ring-shaped; pedicel subcylindrical, about as long as broad, pale brown ( Fig. 1 D-E). Labium elongate, surpassing base of posterior coxae; last segment longer than broad, and shorter than penultimate; entirely pale yellowish ( Fig. 1 ...
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... triangular, in same plane as frons, with carinate ventral projection pointed distally in anterior view, and rounded in lateral view; anterior face of clypeus concolorous with frons, with lines of frons prolongated on clypeus; sides of clypeus black ( Fig. 1 C-E). Antennae with scape short, ring-shaped; pedicel subcylindrical, about as long as broad, pale brown ( Fig. 1 D-E). Labium elongate, surpassing base of posterior coxae; last segment longer than broad, and shorter than penultimate; entirely pale yellowish ( Fig. 1 B). ...
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... with scape short, ring-shaped; pedicel subcylindrical, about as long as broad, pale brown ( Fig. 1 D-E). Labium elongate, surpassing base of posterior coxae; last segment longer than broad, and shorter than penultimate; entirely pale yellowish ( Fig. 1 B). ...
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... pronotum (dorsal view) very short with anterior margin bisinuate, convex anteriorly between eyes, and posterior margin broadly rounded; disc slightly concave; dark brown with anterior half of disc pale yellowish (Fig. 1 A). Paranotal lobes extending laterally, exceeding basal angle of tegmina; with ventral margin straight and lateroventral angle rounded; black on leading margin, progressively paler posteroventrally (Fig. 1 D-E). Mesonotum smooth, short, triangular with all margins incurved and a blunt carina along anterior margin, stopping before lateral ...
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... anteriorly between eyes, and posterior margin broadly rounded; disc slightly concave; dark brown with anterior half of disc pale yellowish (Fig. 1 A). Paranotal lobes extending laterally, exceeding basal angle of tegmina; with ventral margin straight and lateroventral angle rounded; black on leading margin, progressively paler posteroventrally (Fig. 1 D-E). Mesonotum smooth, short, triangular with all margins incurved and a blunt carina along anterior margin, stopping before lateral angles; pale yellowish with anterior face blackish, central portion of anterior carina largely dark brown and median line and 2 spots on disc brown (Fig. 1 A). Tegulae dark brown ( Fig. 1 E). Episternum pale ...
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... on leading margin, progressively paler posteroventrally (Fig. 1 D-E). Mesonotum smooth, short, triangular with all margins incurved and a blunt carina along anterior margin, stopping before lateral angles; pale yellowish with anterior face blackish, central portion of anterior carina largely dark brown and median line and 2 spots on disc brown (Fig. 1 A). Tegulae dark brown ( Fig. 1 E). Episternum pale yellowish with transverse black line ( Fig. 1 B, ...
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... smooth, short, triangular with all margins incurved and a blunt carina along anterior margin, stopping before lateral angles; pale yellowish with anterior face blackish, central portion of anterior carina largely dark brown and median line and 2 spots on disc brown (Fig. 1 A). Tegulae dark brown ( Fig. 1 E). Episternum pale yellowish with transverse black line ( Fig. 1 B, D-E). ...
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... dark brown ( Fig. 1 E). Episternum pale yellowish with transverse black line ( Fig. 1 B, D-E). ...
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... broadly semicircular, strongly convex with a marked concavity along costal margin near base (visible behind profemora on Fig. 1 A); apical angle narrowly rounded; subcoriaceous with dense reticulum of veinlets covering all surfaces; basal cell marked with brown; basal 3/5 black with large pale yellowish marking at base along costal margin and transverse marking brown with pale yellowish veins extending from postclaval margin to about middle of tegmen; distal 2/5 ...
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... covering all surfaces; basal cell marked with brown; basal 3/5 black with large pale yellowish marking at base along costal margin and transverse marking brown with pale yellowish veins extending from postclaval margin to about middle of tegmen; distal 2/5 brown with pale yellowish veins; costal margin entirely underlined with fine black line ( Fig. 1 ...
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... wings: (Fig. 1 B) brown, unilobed, with veins darker, slightly shorter than tegmina. Venation reticulate with main longitudinal veins distinct basally (C, ScP+R, MP, CuA), anal area absent; numerous cross-veinlets; veins thicker and darker along antero-distal margin. Costal and cubital margins sinuate, distal margin ...
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... elongate and slender with femora wider and shorter than corresponding tibiae ( Fig. 1 A-B); mesofemora with sharp posterior margin abruptly roundly emarginate distally; posterior tibiae with 2 lateroventral spines on distal half and 6 apical spines; first metatarsomere rather short, with ventral pad of microsetae, strong apical tooth on each side and 6-7 small teeth along posterior margin; second metatarsomere with ...
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... and stopped at distal emargination, mesofemora dorsally with narrow elongate marking along anterior margin on basal half and wider, rather short anteapical elongate marking, wide anteroventral line on metafemora, elongate dorsal marking in middle of metatibiae and apex of latter, metatibial spines; tarsi brown with pro-and mesobasitarsomere paler (Fig. 1 A-B, D). Metatibiotarsal formula: (2) ...
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... dark brown ventrally with sternite VII turning yellowish in females ( Fig. 1 B); dorsum yellow-brown with terminal segments darker. ...
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... single species of Gergithus, G. niger (Walker, 1857) was recorded from Borneo (WALKER, 1857) but is separated by its black dorsal colour and its frons without black lines along lateral margins under eyes (illustration in GNEZDILOV, 2015, fig. 19). Head: vertex subrectangular, about as broad as eye in dorsal view; disc concave with bluntly elevated margins and 2 shallow fossulae in middle; posterior margin slightly incurved; yellowish brown with fossulae slightly darker (Fig. 5 A). Posterior face of head yellow. Genae yellow with median black-brown line starting from ventral ...

Citations

... The Laotian fauna of Issidae is currently poorly documented and contains only five species: Bardunia brevinaso Gnezdilov, 2011, Eusudasina nantouensis Yang, 1994, Flavina acuta Ran & Liang, 2006, Kodaianella bicinctifrons Fennah, 1956 and Tapirissus guilberti Gnezdilov, 2014(BOURGOIN, 2021. Within Indochina, this represents a very low number as compared to Vietnam (38 species) but a rather similar situation as in Cambodia (3 species) or Thailand (8 species), reflecting the need to study the issid faunal diversity of the region (CONSTANT & BARTLETT, 2019;BOURGOIN, 2021;CONSTANT, 2021). ...
Article
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The new genus Laohiracia gen. nov. is described to accommodate a new species, L. acuta sp. nov. from Laos. The new genus is placed in the Parahiraciini. It is compared with the genera Macrodaruma Fennah, 1978, Macrodarumoides Che, Zhang & Wang, 2012, Pseudochoutagus Che, Zhang & Wang, 2011 and Rostrolatum Che, Zhang & Wang, 2020 with which it shares possessing an elongate, pointed head. Illustrations of habitus, details and male genitalia are given along with equivalent habitus illustration of Pseudochoutagus rubens Gnezdilov & Constant, 2012 for comparison, and a distribution map. Together with the new taxa, the Issidae fauna of Laos now comprises 5 species belonging to 5 genera. The elongate head condition is discussed.