Anomocephala rosiegeorgeorum, Percy, 2025

Anomocephala rosiegeorgeorum sp. nov.

( Figs 3A–3C, 3F–3N, 3Q–3R View FIGURE 3 , 4A–4C, 4G–4M View FIGURE 4 )

Adult colour and structure. General colour probably dark brown or dark red, apical metatarsus dark brown to black; forewing membrane clear in males, females with an irregular band of brown pigmentation (sometimes only faint, especially in teneral females) in the hind margin half of the wing ( Figs 3A, 3C View FIGURE 3 ). Genal processes long and slender, longer than vertex length (ratio VL:GC 0.70–0.87), contiguous for almost entire length ( Figs 3G, 3I, 3K View FIGURE 3 ). Antenna approximately 1.5 times longer than head width (ratio AL:HW: 1.47–1.62), segment 3 long, approximately 1/3 antennal length and subequal or longer than segments 6–8 combined, subapical seta longer than either segment 9 or 10 ( Fig. 3F View FIGURE 3 ). Metacoxa with moderate sized meracanthus, base of metatibia with distinct genual spine or small cluster of ~2 spines, apex slightly expanded, bearing 3 (1+2) sclerotized apical spurs with single spur slightly stalked, and the pair of spurs hardly conjoined ( Figs 3L, 3M, 3N View FIGURE 3 ). Forewing membrane surface spinules dense, forewing apex bluntly acute ( Figs 3A, 3C View FIGURE 3 ). Hindwing more than 0.7 times forewing length, apex broadly rounded ( Fig. 3B View FIGURE 3 ). Male terminalia with subgenital plate well rounded; proctiger short with pronounced posterior lobes basally ( Fig. 4A View FIGURE 4 ); paramere long and slender, curving slightly towards posterior and apices turned inwards, with simple setae shorter on exterior and longer on interior surfaces ( Figs 4A, 4B View FIGURE 4 ); distal aedeagus segment apex with moderate sized bulbous head. Female terminalia as given in generic description, in lateral view proctiger dorsal surface more or less straight or somewhat undulating with longer simple setae in apical portion ( Figs 4G, 4H, 4I, 4J View FIGURE 4 ).

Adult measurements (mm) and ratios. ( 4 males, 7 females). WL: 2.39–2.92; WW: 0.81–1.09; HW: 0.61– 0.69; AL: 0.87–1.12; PB: 0.09–0.10; WL:WW: 2.68–2.95; WL:RsL: 1.83–2.11; CUR: 1.04–1.37; MR: 0.53–0.62; HM:HCU: 1.36–1.88; HW:VW: 1.68–1.85; VL:VW: 0.54–0.74; VL:GC: 0.70–0.87; WL:HW: 3.85–4.36; AL:HW: 1.47–1.62; HW:HT: 0.91–1.23; HT:HF: 1.17–1.34. Male terminalia: MP: 0.22–0.23; PL: 0.35–0.36; AEL: 0.23–0.25; PL:HW: 0.56–0.59; MP:PL: 0.63–0.64; PL:AEL: 1.44–1.52; AEL:AELH: 2.30–2.78; PL:SH: 1.30–1.44. Female terminalia: FP: 0.42–0.52; FSP: 0.32–0.41; RL: 0.15–0.22; OVH: 0.09–0.10; EL: 0.27–0.32; EW: 0.09–0.11; FP: RL: 2.36–2.80; FP:HW: 0.68–0.76; FP:SP: 1.27–1.50; EL:EW: 2.90–3.10.

Immature. Unknown.

Egg. Oblong-ovoid, approximately 3 times longer than wide, with a short, laterally positioned pedicel subbasally on ventral side ( Figs 4K, 4L View FIGURE 4 ); dorsal and lateral surface with distinctly hexagonal, honeycomb-like, sculpturing ( Figs 4K, 4M View FIGURE 4 ); dorsum keeled with a longitudinal medial ridge ( Fig. 4K View FIGURE 4 ), ventral side concave ( Fig. 4L View FIGURE 4 ), tail apparently lacking.

Host plant. Unconfirmed without immatures, but most adults were collected from Metrosideros collina ( Myrtaceae ).

Comment. The most obvious characters that differentiate A. rosiegeorgeorum from A. unica are used in the species key above, additional differences include smaller meracanthus, metatibia shorter (ratio HT:HF <1.35), base of metatibia with only a single or small cluster of ~2 genual spines, apex of metatibia less expanded, with spurs less stalked or conjoined ( Figs 3L, 3M, 3N, 3O, 3P View FIGURE 3 ), forewing relatively shorter (ratio WL:HW <4.5) with cell r 1 not narrowing as much towards cell apex, cell cu 1 higher (ratios CUR <1.5 and HM:HCU <2) ( Fig. 3A, 3D View FIGURE 3 ), hindwing relatively longer (more than 0.7 times forewing length) with a more broadly rounded apex ( Figs 3B, 3E View FIGURE 3 ), paramere longer and proctiger shorter (ratio MP:PL <0.6) ( Figs 4A, 4D View FIGURE 4 ).

Systematics. This species was included in the mitogenome analysis of Percy et al. (2018) (as “DP2.idba.210_ circ_ Triozidae _ Anomocephala _sp”). The two Anomocephala species on Rapa are strongly supported as sister taxa (100% bootstrap) and are moderately divergent (9.7% COI divergence).See systematics section under Anomocephala and Discussion.

Genetic resources. Genbank: MG988637 View Materials ( COI), MG988913 View Materials (cytB) .

Distribution. Only known from Mt. Perahu on Rapa island, Austral Islands, French Polynesia.

Type material. Holotype male (slide mounted), Mt. Perahu ridge, 590 m, ex Metrosideros , 12 Oct. 2002, coll. “vial 3” AnomoRG, R. Gillespie leg. ( NHMUK) . Paratypes 2 males, 4 females (slide mounted), as for holotype ( NHMUK and DMPC) .

Other material examined. 2 males, 6 females (slide mounted) Mt. Perahu , 650 m, ex Metrosideros , 9 th- 11 th Dec. 2002, coll. “vials 5, 9, 15” RG-Anomo-02, R. Gillespie leg. ( DMPC) .

Etymology. The species name honours two Pacific island biologists, professional and familial partners Rosie Gillespie and George Roderick. Although the only specimens of A. rosiegeorgeorum were collected by Rosie Gillespie, those who have worked with Rosie and George know that all endeavours are joint and that they operate as a symbiotic unit.