Diognetus giganteus, Yasunaga & Schwartz & Chérot, 2023

Yasunaga, Tomohide, Schwartz, Michael D. & Chérot, Frédéric, 2023, Revision of the plant bug genus Diognetus, with descriptions of thirteen new species from the Oriental and Eastern Palearctic Regions (Hemiptera: Heteroptera: Miridae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 63 (1), pp. 1-55 : 18

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https://doi.org/ 10.37520/aemnp.2023.001

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scientific name

Diognetus giganteus

sp. nov.

Diognetus giganteus sp. nov.

( Figs 7I View Fig , 27J− K View Fig )

Type material. HOLOTYPE: ♀, MALAYSIA: PAHANG: Cameron Highlands , 4.488, 101.367, at UV light, 28 Jul 1986, S. Gotoh ( ZRC) ( AMNH _ PBI 00380748 ). GoogleMaps

Description. Female (holotype). Body ovoid, largest among known congeners with total length 6.7 mm, maximum width 3.2 mm. COLORATION: Dorsum pale brown, partly tinged with red ( Fig. 7I View Fig ). Head reddish-brown. Antennae pale brown; segment I pale reddish-brown; apical 1/5 of segment II, whole segment III and segment IV (except for yellow extreme base of III) dark brown. Labium shiny pale reddish-brown (segments III− IV not observed as heavily glued). Pronotum irregularly speckled with dark maculae; mesoscutum and scutellum reddish-brown, with irregular symmetrical dark maculae and yellow apex; lateral margin of pronotum and dorsal half of propleuron shiny dark brown; mesepimeron and episternum infuscate; scent efferent system creamy yellow. Hemelytron pale reddish-brown, speckled with irregular dark maculae; cuneus pale brown, with sanguineous suffusion along inner margin; membrane pale grayish brown, semitransparent, with lighter veins. Coxae and legs reddish-brown; metafemur with two brown rings subapically (basal one wider); tarsi pale brown. Ventral surface of abdomen pale brown, with reddish or brownish lateral and posterior margins. SURFACE AND VESTITURE: As in generic diagnosis; dorsal vestiture relatively short; scutellum and hemelytron rather matte, weakly and sparsely punctate ( Fig. 27K View Fig ). STRUCTURE: Eye relatively large; vertex a little narrower than an eye in dorsal view. Antennal segment II slightly longer than pronotal width. Scutellum inflated, transversely rugose. Scent efferent system relatively large, with thick peritreme ( Fig. 27J View Fig ). FEMALE GENITALIA: Not examined, as a single available specimen is excessively glued.

Male. Unknown.

Measurements. See Table 1.

Differential diagnosis. Easily recognized by its largest size among known congeners; ovoid and tumid body; and relatively inflated pronotal disk and scutellum. These diagnostic characters enable to be distinguished from any other known species of Diognetus .

Etymology. Latin adjective giganteus (large, giant), referring to its largest size among the congeners.

Biology. Unknown.

Distribution. Malaysia (Pahang).


Departamento de Biologia de la Universidad del Valle


Zoological Reference Collection, National University of Singapore


American Museum of Natural History













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