Campylomma singapura Yasunaga, Yap & Hwang 2025, sp. nov.
Creators: name: Yasunaga, Tomohide
name: Yap, Ee-Hean
name: Ito, Reo
name: Hwang, Wei-Song
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Miridae
Campylomma
Campylomma singapura

description: Campylomma singapura Yasunaga, Yap & Hwang, sp. nov.
Figs. 1E–F, 2E–G, 3D–I, 4F, 5E–F, 8A–M
Material examined. Holotype (♂). SINGAPORE: National University of Singapore (NUS) campus, Ventus area, Hibiscus tiliaceus (Fig. 1A–B), 1°17’43.3”N 103°46’14.5”E, 22 Aug 2023, T. Yasunaga (ZRC) (AMNH _ PBI 00378808). Paratypes: SINGAPORE: Same data as for holotype, 1♂, 1♀ (TYCN); same data, except for date, 20 Aug 2023, 1♂, 2♀ (TYCN); 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); Windsor Nature Park, N1.35896, E103.82655, 18 Mar 2024, E. H. Yap, 1♂ (ZRC _ BDP 0372657); Canberra Link, N1.44562, E103.82849, 11 Mar 2024, E. H. Yap, 1♀ (ZRC _ BDP 0372642).
Diagnosis. Recognized by its small size; uniformly lemon yellow general coloration; two fuscous rings at antennomeres I and base of II (Fig. 2E–F); short labium not exceeding apex of mesocoxa (Fig. 3E–F); smooth male genital segment (pygophore) lacking thumb-like process; relatively stout vesica with a peg-like spicule (Fig. 4F); narrow-rimmed sclerotized ring (Figs. 5E, 8M); and almost membranous anterior median part of posterior wall (Fig. 8K). 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). However, the latter species known from Thailand obviously differs in the following features: fuscous general coloration (Fig. 2H); uniformly pale antenna without dark annulation; rounded peritreme on scent efferent system; shorter parempodia (Fig. 8O); shorter vesica with smaller apical spicule (Fig. 4G); thicker rim of sclerotized rings (Fig. 5G); and uniformly pale green 5th instar nymph with more densely distributed setae on dorsum (Fig. 2I).
Description. Male: Body generally light lemon yellow in live and fresh specimens (Fig. 2E, 3D–E), 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). Eyes relatively large, occupying whole height of head in lateral view (Fig. 8A). 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, 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); meta-tarsomere II slightly shorter than III (Fig. 8F); pretarsal structure as in Fig. 8G; pulvilli developed, with two hair-like process; parempodia with spatulate apex. Abdomen shiny yellow. Male genitalia (Fig. 4F, 8H–J): Pygophore (genital segment) smooth, lacking thumb-like process; phallotheca sharply tapered apically (Fig. 8H); vesica generally short and thick (Figs. 4F, 8I), with a short blade (Fig. 8J). 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, 8K–L): genital chamber narrow, with elongate oval, narrow-rimmed sclerotized rings (Figs. 5E, 8M); posterior wall of bursa copulatrix with densely distributed, scaly microstructures on interramal sclerite (Fig. 8L), lacking field of spinules anteriorly (Fig. 8K).
Measurements: See 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). 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.
description: Published as part of Yasunaga, Tomohide, Yap, Ee-Hean, Ito, Reo & Hwang, Wei-Song, 2025, Two cryptic new species of the plant bug genus Campylomma recently discovered in Japan and Singapore (Hemiptera: Heteroptera: Miridae: Phylinae), pp. 537-552 in Zootaxa 5609 (4) on pages 545-550, DOI: 10.11646/zootaxa.5609.4.5, http://zenodo.org/record/15215469