Danieliana manmiaoyangae, Percy, 2025

Danieliana manmiaoyangae sp. nov.

( Figs. 1 View FIGURE 1 , 2 View FIGURE 2 , 3 View FIGURE 3 , 4 View FIGURE 4 )

Adult colour and structure. General body colour bright green, to yellow-green ( Figs. 4A, 4C View FIGURE 4 ); forewing infused orange-yellow, in some individuals fuscous margins to apical cells. Antenna yellow-green with darker apices on segments 6–8, and segments 9–10 dark. Head and thorax structure as given in generic description, both with scattered short simple setae and longer simple setae on genae, surfaces rugose. Antenna structure as in generic description, with scattered simple setae. Forewing with vein Rs slightly to moderately sinuate ( Figs. 1A, 1C View FIGURE 1 ). Male proctiger in lateral view, parallel sided with constriction only below apex ( Fig. 2A View FIGURE 2 ). Male subgenital plate elongate, about twice as long as high, broader basally and tapering apically, in posterior view slightly vase-shaped, well rounded ventrally ( Fig. 2E View FIGURE 2 ). Paramere in lateral view simple, long, slender and slightly sinuate ( Figs. 2B, 2C View FIGURE 2 ), in dorsal view with interiorly directed ridge ( Figs. 2E, 2F View FIGURE 2 ), with long simple setae on the interior and posterior surfaces, and short simple setae on the exterior surface, and one particularly long seta directed anteriorly from the apex ( Fig. 2C View FIGURE 2 ). Proximal aedeagus segment inflated distally ( Fig. 2A, 2D View FIGURE 2 ), distal aedeagus segment with bulbous, rounded apex bearing a posteriorly directed flange ( Fig. 2D View FIGURE 2 ). Female terminalia short ( Fig. 2K View FIGURE 2 ), in lateral view proctiger post anal ring concave, descending steeply to an upturned apex bearing long setae dorsally ( Fig. 2L View FIGURE 2 ), apex acute in dorsal view ( Fig. 2G View FIGURE 2 ), anal ring narrowly oval and composed of a double row of pores ( Fig. 2J View FIGURE 2 ); ovipositor valvulae dorsalis small and low, with a single blunt serration on valvulae ventralis ( Fig. 2I View FIGURE 2 ); subgenital plate short, apex blunt in ventral view ( Fig. 2H View FIGURE 2 ).

Adult measurements (mm) and ratios. ( 7 males, 3 females). Males 2.7–3, females 3–3.4 (measured from apex of genae to wing apex). WL: 2.01–2.56; WW: 0.89–1.14; HW: 0.73–0.78; AL: 1.11–1.20; PB: 0.09–0.11; WL:WW: 2.12–2.34; WL:RsL: 1.63–1.72; CUR: 1.18–1.42; MR: 0.46–0.55; HM:HCU: 1.88–2.16; HW:VW: 1.63–1.76; VL: VW: 0.51–0.57; AL:HW: 1.49–1.59; HW:HT: 1.63–1.74; HT:HF: 0.98–1.07. Male terminalia: MP: 0.51–0.53; PL: 0.38–0.39; AEL: 0.24–0.26; PL:HW: 0.51–0.52; MP:PL: 1.31–1.37; PL:AEL: 1.50–1.63; AEL:AELH: 2.40–3.00; PL:SH: 1.63–1.90. Female terminalia: FP: 0.53–0.56; FSP: 0.32–0.33; RL: 0.21–0.23; OVH: 0.02–0.03; EL: 0.28; EW: 0.12; FP:RL: 2.43–2.52; FP:HW: 0.71–0.72; FP:SP: 1.7–1.75; EL:EW: 2.33.

Immature colour and structure. 5th instar yellow, green, or blue-green, typically with dark brown to black sclerites, caudal plate, wing pads, and notably, antennal segments 5 th and 7 th ( Fig. 4B View FIGURE 4 ). Younger instars usually yellow or orange ( Fig. 4A View FIGURE 4 ), some with darker sclerites. 5 th instar structure and chaetotaxy as in generic description.

Immature measurements (mm) and ratios. 5th instar (n = 5): BL 1.69–1.99; BW 1.12–1.34; WPL 0.55–0.59; CPL 0.42–0.45; CPW 0.77–0.87; RW 0.20–0.21; HW 0.65–0.73; AL 0.89–0.93; BL:BW 1.31–1.60; HW:AL 0.73– 0.80; CPW:RW 3.85–4.35.

Egg colour and structure. Orange-yellow ( Fig. 4D View FIGURE 4 ), broadly ovoid, smooth, with no apparent surface sculpturing or patterning, with a short sub-basal pedicel on the underside, and a long tail ( Fig. 2M View FIGURE 2 ).

Host plant. Caesalpinia crista ( Fabaceae ).

Biology. Immatures free-living, and the species is possibly multivoltine (see Discussion).

Note. Despite Caesalpinia crista ( Fabaceae ) being widespread and not uncommon in SE Asia, Australasia and South Asia, Danieliana manmiaoyangae is the first psyllid to be described from this plant.

Comment. This is the only species currently known for the genus.

Systematics. In the mitogenome analysis of Percy et al. (2018), this species is recovered in Group U (subfamily Amorphicolinae ) as a strongly supported clade (97%) together with Amorphicola amorphae .

Genetic resources. Genbank: MG988747 View Materials (DPTAI79) for cytochrome oxidase 1 (COI), and MG989051 View Materials (DPTAI7910), OR886079 (DPTAI79) for cytochrome b (cytB).

Distribution. Only known from one area ( Pingtung) in southern Taiwan.

Type material. Holotype male (slide mounted), Pingtung, Taiwan, N 21.95014, E 120.82314, 189 m, ex Caesalpinia crista , 30th January 2010, coll. DPTAI79-10 , DM Percy leg. ( NHMUK) GoogleMaps . Paratypes: 20 males (6 slide mounted, 14 in ethanol), 12 females (3 slide mounted, 9 in ethanol), 16 immatures (10 slide mounted, 6 in ethanol), as for holotype ( NHMUK, DMPC) .

Other material examined. Additional material collected in 2023 by Yi-Chang Liao is the subject of the photographs in Fig. 4 View FIGURE 4 , collection details as follows: 10 males, 11 females, 25 immatures; Pingtung Co., Hengchun ; 21°57’11.9” N, 120°49’26.7” E; 19 Jan. 2023; YC Liao leg.; Caesalpinia crista ; NCHU, dry mounted or stored in ethanol GoogleMaps .

Etymology. The species name honours Man-Miao Yang in a tribute to her extraordinary contribution to our knowledge of psyllids.