Campylomma singapura Yasunaga, Yap & Hwang, 2025

Campylomma singapura Yasunaga, Yap & Hwang , sp. nov.

Figs. 1E–F View FIGURE 1 , 2E–G View FIGURE 2 , 3D–I View FIGURE 3 , 4F View FIGURE 4 , 5E–F View FIGURE 5 , 8A–M View FIGURE 8

Material examined. Holotype (♂). SINGAPORE: National University of Singapore ( NUS) campus, Ventus area, Hibiscus tiliaceus ( Fig. 1A–B View FIGURE 1 ), 1°17’43.3”N 103°46’14.5”E, 22 Aug 2023, T. Yasunaga ( ZRC) ( AMNH _ PBI 00378808 ). GoogleMaps Paratypes: SINGAPORE: Same data as for holotype, 1♂, 1♀ ( TYCN) GoogleMaps ; same data, except for date, 20 Aug 2023, 1♂, 2♀ ( TYCN) GoogleMaps ; Singapore Botanic Gardens , 1°19’15”N 103°49’05”E, Hibiscus tiliaceus , 21 Aug 2023, T. Yasunaga & E. H. Yap, 4♂, 2♀ ( TYCN, ZRC) GoogleMaps ; Windsor Nature Park , N1.35896, E103.82655, 18 Mar 2024, E. H. Yap, 1♂ ( ZRC _ BDP 0372657 View Materials ) GoogleMaps ; Canberra Link , N1.44562, E103.82849, 11 Mar 2024, E. H. Yap, 1♀ ( ZRC _ BDP 0372642 View Materials ) GoogleMaps .

Diagnosis. Recognized by its small size; uniformly lemon yellow general coloration; two fuscous rings at antennomeres I and base of II ( Fig. 2E–F View FIGURE 2 ); short labium not exceeding apex of mesocoxa ( Fig. 3E–F View FIGURE 3 ); smooth male genital segment (pygophore) lacking thumb-like process; relatively stout vesica with a peg-like spicule ( Fig. 4F View FIGURE 4 ); narrow-rimmed sclerotized ring ( Figs. 5E View FIGURE 5 , 8M View FIGURE 8 ); and almost membranous anterior median part of posterior wall ( Fig. 8K View FIGURE 8 ). The final instar nymph has shiny lemon yellow general coloration and ovoid body.

Based on similar shape of the vesica and habitat preference, this new species is most closely related to Campylomma hibiscicola Yasunaga ( Fig. 2H–I View FIGURE 2 ). However, the latter species known from Thailand obviously differs in the following features: fuscous general coloration ( Fig. 2H View FIGURE 2 ); uniformly pale antenna without dark annulation; rounded peritreme on scent efferent system; shorter parempodia ( Fig. 8O View FIGURE 8 ); shorter vesica with smaller apical spicule ( Fig. 4G View FIGURE 4 ); thicker rim of sclerotized rings ( Fig. 5G View FIGURE 5 ); and uniformly pale green 5th instar nymph with more densely distributed setae on dorsum ( Fig. 2I View FIGURE 2 ).

Description. Male: Body generally light lemon yellow in live and fresh specimens ( Fig. 2E View FIGURE 2 , 3D–E View FIGURE 3 ), oval, slightly elongate, small, 1.9–2.1 mm in total length; dorsal surface shining, with uniformly distributed, pale, semierect or reclining setae, sparsely mixed with flat, lanceolate setae ( Fig. 8C View FIGURE 8 ). Eyes relatively large, occupying whole height of head in lateral view ( Fig. 8A View FIGURE 8 ). Antenna pale brown; antennomere I whitish, usually darkened except for base and apex; antennomere II with dark annulation at base, obviously shorter than head width across eyes. Labium yellowish brown, relatively short, reaching but not exceeding apex of mesocoxa; apical half of segment IV darkened. Pronotum with narrow carina at anterior margin; basal width of pronotum greater than length of metafemur; thoracic pleura light yellow; metathoracic scent efferent system as in Fig. 8D View FIGURE 8 , with squared peritreme. Hemelytra shining; membrane uniformly pale grayish brown, semi-transparent. All coxae creamy yellow; legs yellowish brown; proand mesofemora almost immaculate; ventral dark spots of metafemur relatively small; minute spicules on anterior margin of metafemur present at apical half ( Fig. 8E View FIGURE 8 ); meta-tarsomere II slightly shorter than III ( Fig. 8F View FIGURE 8 ); pretarsal structure as in Fig. 8G View FIGURE 8 ; pulvilli developed, with two hair-like process; parempodia with spatulate apex. Abdomen shiny yellow. Male genitalia ( Fig. 4F View FIGURE 4 , 8H–J View FIGURE 8 ): Pygophore (genital segment) smooth, lacking thumb-like process; phallotheca sharply tapered apically ( Fig. 8H View FIGURE 8 ); vesica generally short and thick ( Figs. 4F View FIGURE 4 , 8I View FIGURE 8 ), with a short blade ( Fig. 8J View FIGURE 8 ). Female: General coloration and shape as in male, but body larger, wider and more ovoid, and antennal segment II slenderer. Female genitalia ( Figs. 5E–F View FIGURE 5 , 8K–L View FIGURE 8 ): genital chamber narrow, with elongate oval, narrow-rimmed sclerotized rings ( Figs. 5E View FIGURE 5 , 8M View FIGURE 8 ); posterior wall of bursa copulatrix with densely distributed, scaly microstructures on interramal sclerite ( Fig. 8L View FIGURE 8 ), lacking field of spinules anteriorly ( Fig. 8K View FIGURE 8 ).

Measurements: See Table 1 View TABLE 1 .

Etymology. Named for the type locality, Singapore (= Singapura in Malay); a noun in apposition.

Distribution. Singapore.

Biology. Both adults and immature forms of this new species were found to cryptically inhabit bracts and pedicules of Hibiscus tiliaceus (with variegated leaves) planted at urbanized zones ( Fig. 1E–F View FIGURE 1 ). At the same niche, three cimicomorphan bugs, Campylomma lividicorne , Deraeocoris sp. ( Miridae : Deraeocorinae), and an undetermined anthocorid species ( Anthocoridae : Oriini ), were found to co-occur.An undetermined tube-tailed thrips ( Thysanoptera : Phlaeothripidae ) and a psyllid, Mesohomotoma hibisci (Froggatt, 1901) (Psylloidea: Carsidaridae ), were also associated with the same hibiscus tree. Campylomma singapura sp. nov. was observed to prey on the thrips.