Diagnosis.

Taxon classification

Animalia

Hemiptera

Triozidae

Percy

Diana M.

Revision of the Hawaiian psyllid genus

Swezeyana

, with descriptions of seven new species (

Hemiptera

Psylloidea

Triozidae

)

Zookeys1552018201875875113

10.3897/zookeys.758.23019

Swezeyana

tentaculata

http://zoobank.org/6605B22E-FEFD-4EA5-A501-5E2D094A877A

sp. n.

Figures 1H, 10

Diagnosis.

Medium sized, red-brown species, with fore wing membrane patterned, antennae medium long, genal processes long, paramere short, and female proctiger more or less straight dorsally.

Description.

Adult. General body colour red to red-brown, last 2-3 antennal segments darker brown. Fore wing distinctly patterned with irregular clouds of red-brown pigmentation, darker brown patches indicate position of cross pseudoveins, intersections of veins and wing margin, as well as two brown patches on the dorsal claval wing margin, and on vein R+M+Cu₁ just basal to vein trifurcation, there are distinctly unpigmented areas surrounding marginal clusters of radular spines (Figs 1H, 10S). Fore wing apex bluntly acute; pseudopterostigma short (Fig. 10R), 4-6 cross pseudoveins in cell r₁ (Fig. 10R–S); surface spinules densely distributed in all cells; long setae on ventral margin and medium short to short setae on veins and dorsal margin. Antennae medium long (ratio AL:HW 1.40–1.61) (Fig. 10C, E–F); genal processes long (GP ≥ 0.35 mm, ratio HW:GP ≤ 1.35) and upturned at apices (Figs 10A–C); medium short to short setae on vertex and thorax. Meracanthus reduced, almost absent, genual spine developed (Fig. 10H). Male terminalia (Fig. 10P–Q): paramere short (ratio PL:HW < 0.30), tapering to apex with two short stout setae; distal aedeagus segment long relative to paramere (ratio PL:AEL < 0.90), apex developed into a large rounded hook with acute apex. Female terminalia (Fig. 10I–N): proctiger dorsal surface more or less straight, tapering to bluntly acute apex without medial cleft, anal ring relatively short (ratio FP:RL 2.24–2.59), with well-developed head compartment at proximal end, distal portion of ring margin convoluted; subgenital plate more or less straight ventrally with little or no medial cleft and with beak and membrane slightly extended (Fig. 9L–N).

Figure 10.

Swezeyana tentaculata sp. n. A head B head (lateral view) C head and antenna (lateral view) D dorsum of thorax E antenna F head and antenna G proboscis H hind leg, inset highly reduced meracanthus (indicated) and base of hind tibia with genual spine (indicated) I female terminalia endoskeleton (dorsal view) J female terminalia (subgenital beak indicated, apex outlined) K female proctiger (dorsal view) L female subgenital plate (ventral view, apex outlined) M detail of posterior apex of female subgenital plate with beak and membrane (outlined) N detail of anal ring (dorsal view, outlined) O egg (outlined), inset detail of sculpturing on dorsal service P aedeagus and paramere Q male terminalia R fore wing (above), with interior edge of ventral margin outlined, hind wing (below) S fore wing detail of pigmented cross veins and unpigmented membrane surrounding marginal radular spine clusters.

Egg. Pale, sculpturing consisting of rounded indentations dorsally (Fig. 10O).

Immature. Colour: Mostly red-brown, some cream mottling. Structure: 5^th instar with circumanal ring wide, slightly constricted medially and lateral apices upturned, with a single row of uninterrupted elongate cells (Fig. 13I). Chaetotaxy: 5^th instar with marginal, pointed sectasetae, and sub-marginal longer acute, simple setae on enlarged, ridged annuli or pediments (Fig. 13H, J–K); dorsal surface rugose, with small club setae, and with distinct arrangement of 28 protruding tubercles and tentacles (13 on head and thorax, 15 on abdomen, of these 10 are medial, and 18 are lateral or sub-marginal), all but 4 of the dorso-medial protuberances (on abdomen) are developed into elongate tentacles bearing scattered small, blunt, simple setae on the apical portion, and small club setae on the basal portion, tentacle apices bear 1-2 acute simple setae (Fig. 13L). 3^rd – 4^th instar chaetotaxy and tubercle/tentacle arrangement similar to 5^th instar (Fig. 12G–J); in 3^rd instars the lateral and submarginal tubercles bear 2 club setae at the apices (Fig. 12I), and the dorso-medial tubercles destined to become tentacles are larger and bear several club setae (Fig. 12H), by 4^th instar elongation into tentacles is already evident. Somewhat more darkly pigmented tentacles are found in the same position as described for S. reticulata (the distal medial tentacles on thorax and abdomen, and the proximal lateral tentacles on abdomen; Fig. 13H, K). The tentacles are also evident in photographs of immatures on the leaf surface (Fig. N).

Immature measurements (mm) and ratios: 5^th instar (n = 3): BL 1.48–1.52; BW 0.91–0.97; WPL 0.73–0.76; CPL 0.64; CPW 0.76; RW 0.16–0.17; HW 0.48–0.52; AL 0.18; BL:BW 1.56–1.63; HW:AL 2.61–2.95; CPW:RW 4.51–4.92.

Host plant.

Planchonella sandwicensis.

Distribution.

Kauai. Only known from Kokee State Park.

Etymology.

Named for the distinctly long tentacles on the dorsum of immatures (adjective in the nominative singular).

Comments.

Found sympatrically with S. reticulata and S. elongagena on the same individual plants. Immatures were observed among the ferugineous trichomes on the undersides of leaves, often along the leaf mid-rib (Fig. 13N).

Material examined.

Holotype male (slide mounted), Kokee State Park, Kauai, USA, N22.1444, W-159.6477, ex Planchonella sandwicensis, 29 October 2005, “Hi01-05” D. Percy leg. (BMNH). Paratypes (slide mounted) 3f 7i, as for holotype (BMNH). Other material: 2m 2f, Kokee State Park, Kauai, USA, N22.1309, W-159.6388, ex Planchonella sandwicensis, 30 October 2005, “Hi05-05” D. Percy leg. (BMNH).

Gene sequences.

MG989157 (cytB) (Hi01-05).

Figure 1.

Fore wings of nine Swezeyana species: A S. elongagena (male) B S. oahuensis (male) C S. atra (male) D S. magna (male) E S. hawaiiensis (female) F S. magnaccai (male) G S. reticulata (male above, female below) H S. tentaculata (male above, female below) I S. rubra (male above, female below). Scale bars: 1 mm.

Figure 9.

Swezeyana reticulata. A head B head and antenna (lateral view) C detail of antenna D hind leg, inset highly reduced meracanthus (indicated) and base of hind tibia with genual spine (indicated) E male F female G dorsum of thorax H head and antenna I metatarsi (outlined) J female proctiger (dorsal view) K detail of anal ring (outlined), illustrating circumanal ring pores L female terminalia (subgenital beak indicated, apex outlined) M female subgenital plate (ventral view, apex outlined) N detail of posterior apex of female subgenital plate with beak and membrane (outlined) O ovipositor P female terminalia (dorsal view), lateral valves extending beyond proctiger Q male terminalia R aedeagus and paramere, with details of paramere apex (above interior view, below dorsal view) S fore wing, with interior edge of ventral margin outlined T fore wing detail of pigmented cross veins.

Figure 13.

Swezeyana reticulata and Swezeyana tentaculata 1^st-4^th instar immatures. A–F S. reticulata: A 1^st instar, inset detail of marginal narrow, blunt sectasetae B 2^nd instar with appearance of tubercles C detail of 2^nd instar anterior marginal and sub-marginal head setae D detail of 2^nd instar marginal tubercles on the thorax bearing simple setae towards apices E 3^rd instar, inset detail of marginal narrow, blunt sectasetae F 4^th instar, inset detail of dorsal and sub-marginal lanceolate setae with inflated and ridged bases G–J S. tentaculata: G 4^th instar, with details of marginal pointed sectasetae, and dorsal and sub-marginal simple setae with narrowly inflated and ridged bases H 3^rd instar, with detail of larger dorso-medial tubercles bearing spiral of slightly capitate rod setae; marginal pointed sectasetae, and dorsal and sub-marginal simple setae with narrowly inflated and ridged bases as for 4^th instar I detail of 3^rd instar pairs of slightly capitate rod setae near the apices of marginal tubercles on the abdomen J detail of 3^rd instar marginal pointed sectasetae, and dorsal sub-marginal simple setae.

Figure 12.

Swezeyana reticulata and Swezeyana tentaculata 5^th instar immatures. A–G, M S. reticulata: A detail of dorsal lanceolate setae with inflated and ridged bases anterior of eye B detail of dorsal sub-marginal lanceolate setae with inflated and ridged bases on margin of wing pads C detail of tubercles on margin of abdomen, and marginal narrow, blunt sectasetae D detail of dorsal tubercle bearing small simple setae, and small lanceolate setae with greatly inflated and ridged bases on surrounding surface E lateral view showing arrangement of dorsal tubercles, open arrows indicate position of thoracic and abdominal tubercles typically more darkly pigmented F dorsal view, open arrows indicate position of thoracic and abdominal tubercles typically more darkly pigmented G anal ring H–L, N S. tentaculata: H dorsal view, open arrows indicate position of thoracic and abdominal tentacles typically more darkly pigmented, inset detail of marginal pointed sectasetae I anal ring J, K detail of dorsal sub-marginal long, simple setae with narrowly inflated and ridged bases, K also shows different pigmentation for 1^st and 2^nd tentacle on abdomen margin L detail of long tentacle with simple setae towards the apex and a pair of small simple setae apically, and longer slightly capitate rod setae towards the base and on surrounding surface M tarsus and antenna (similar for both species) N red-brown S. tentaculata immatures found along the midribs on undersides of leaves among the red-brown leaf trichomes.