Swezeyana reticulata Caldwell, 1940

Percy, Diana M., 2018, Revision of the Hawaiian psyllid genus Swezeyana, with descriptions of seven new species (Hemiptera, Psylloidea, Triozidae), ZooKeys 758, pp. 75-113: 75

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Swezeyana reticulata Caldwell, 1940


Swezeyana reticulata Caldwell, 1940  Figures 1G, 9

Swezeyana reticulata  Caldwell, 1940: 390.


Adult. General body colour yellow-brown to darker brown, last 2-3 antennal segments darker brown. Fore wing patterned with irregular clouds of brown pigmentation (although less distinctly than in S. rubra  and S. tentaculata  ), darker brown patches indicate position of cross pseudoveins, intersections of veins and wing margin, as well as 1-2 brown patches on the dorsal claval wing margin, and a more or less distinct patch on vein R+M+Cu1 just basal to vein trifurcation, unpigmented areas surround the marginal clusters of radular spines (Fig. 1G). Fore wing apex acute to bluntly acute; pseudopterostigma short (Fig. 9S), 3-4 cross pseudoveins in cell r1 (Fig. 9T); surface spinules densely distributed in all cells; medium long setae on ventral margin and short setae on veins and dorsal margin. Antennae medium short (ratio AL:HW 1.25-1.40) (Fig. 9B, I); genal processes medium long (GP < 0.40 mm, ratio HW:GP < 1.65) and slightly upturned at apices (Fig. 9 A–B, E–F); medium short to short setae on vertex and thorax. Meracanthus small, genual spine developed (Fig. 9D). Male terminalia (Fig. 9 Q–R): paramere short (ratio PL:HW < 0.25), tapering to apex with two short stout setae; distal aedeagus segment long relative to paramere (ratio PL:AEL < 0.80), apex developed into a large rounded hook with bluntly acute apex. Female terminalia (Fig. 9 J–P): proctiger dorsal surface more or less straight, tapering to bluntly acute apex without medial cleft, anal ring relatively short (ratio FP:RL 2.17-2.45), with well-developed head compartment at proximal end, distal portion of ring margin slightly convoluted; subgenital plate more or less straight ventrally with little or no medial cleft and with beak and membrane slightly extended (Fig. 9 L–N).

Egg. Pale with shallow hexagonal indentations dorsally.

Immature. Colour: Mottled, cream and red-brown. Structure: 5th instar with circumanal ring wide, and more or less straight, with a single row of uninterrupted elongate cells (Fig. 13G). Chaetotaxy: 5th instar with marginal, narrow, blunt sectasetae, and sub-marginal longer acute, simple setae on enlarged, ridged annuli or pediments (Fig. 13 A–C); dorsal surface rugose, with small acute, simple setae on bulbous, ridged pediments, and with distinct arrangement of 28 protruding tubercles (13 on head and thorax, 15 on abdomen, of these 10 are medial, and 18 are lateral or sub-marginal), tubercles bearing scattered small, blunt, simple setae (Fig. 13 D–F). 1st instar with marginal narrow, blunt sectasetae (Fig. 12A); 2nd instar with marginal narrow, blunt sectasetae, sub-marginal longer acute simple setae on enlarged and ridged annuli or pediments, and 7 sub-marginal tubercles, with 3 on thorax bearing 1-2 acute simple setae, and a marginal sub-apical pair of long simple setae on abdomen (Fig. 12 B–D); 3rd - 4th instar chaetotaxy and tubercle arrangement similar to 5th instar (Fig. 12 E–F). In 4th and particularly 5th instar, 4 of the dorsal tubercles are more darkly pigmented (these are the distal medial tubercles on thorax and abdomen, and the proximal lateral tubercles on abdomen; Fig. 13 E–F).

Immature measurements (mm) and ratios: 5th instar (n = 4): BL 1.67-1.71; BW 1.06-1.15; WPL 0.85-0.88; CPL 0.73-0.79; CPW 0.62-0.97; RW 0.17-0.18; HW 0.52-0.57; AL 0.19-0.20; BL:BW 1.49-1.57; HW:AL 2.60-2.96; CPW:RW 3.70-5.77.

Host plant.

Planchonella sandwicensis  .


Kauai (possibly also on Maui, see comments). Appears to be the most common of the three Swezeyana  species found on Kauai.


Tuthill (1966) notes the co-occurrence of two species on Maui, and refers to these as S. elongagena  and S. reticulata  ; but S. reticulata  is here considered endemic to Kauai and the observed species on Maui may be an as yet undescribed species. The immatures as noted by Tuthill have "a remarkable armament of large proturberances [sic] on the dorsal surface" and therefore fit within the reticulata  group.

Material examined.

Holotype female (BPBM, not located). Other material: 1f, Nualolo Trail, Kokee State Park, Kauai, USA, on Polyscias waimeae  , 25 May 2002, “370-02” D. Percy leg. (BMNH). 10m 4f 7i, Kokee State Park, Kauai, USA, N22.1444, W-159.6477, ex Planchonella sandwicensis  , 29 October 2005, “Hi01-05” D. Percy leg. (BMNH). 5m 1f, Kokee State Park, Kauai, USA, N22.1503, W-159.6453, ex Planchonella sandwicensis  , 29 October 2005, “Hi02-05” D. Percy leg. (BMNH). 12m 7f, Kokee State Park, Kauai, USA, N22.1309, W-159.6388, ex Planchonella sandwicensis  , 30 October 2005, “Hi05-05” D. Percy leg. (BMNH). 1m 10f, Kokee State Park, Kauai, USA, N22.0948, W-159.6953, ex Planchonella sandwicensis  , 30 October 2005, “Hi11-05” D. Percy leg. (BMNH).

Gene sequences.

MG988833 (COI) MG989154 (cytB) (Hi01-05); MH001524 (COI) MH001530 (cytB) (Hi05-05 adult); MH001525 (COI) MH001531 (cytB) (Hi05-05 immature); MH001526 (COI) MH001532 (cytB) (Hi11-05).