Pariaconus hina Percy

Percy, Diana M., 2017, Making the most of your host: the Metrosideros-feeding psyllids (Hemiptera, Psylloidea) of the Hawaiian Islands, ZooKeys 649, pp. 1-163 : 25-28

Pariaconus hina Percy sp. n. Figures 6, 7

Adult colour.

Typically bicoloured, generally pale cream-yellow to green on thorax and abdomen, head darker, with or without a dark dorsal stripe from the head extending part or all the length of the body (Fig. 6K, M, Q). Fore wing membrane slightly to moderately fuscous.

Adult structure.

Fore wing apex rounded to bluntly acute; surface spinules well dispersed, present in all cells but reduced coverage in r1 and c+sc; setae on margins and veins short to minute (Fig. 6 A–C). Antennae short (av. length 0.67; ratio AL:HW av. 1.38); genal processes extremely short (ratio VL:GP av. 5.17); short to minute setae on vertex and thorax; vertex comparatively wide (ratio HW:VW av. 1.89); distal proboscis segment short (av. length 0.06); hind tibia subequal to head width (ratio HW:HT av. 1.03) (Fig. 6 D–J, L, N–P, R–S). Male terminalia (Fig. 7 A–E): paramere shorter than proctiger (ratio MP:PL av. 1.16), broad at base, tapering to narrow neck below apex with short, inward pointing hook; distal aedeagus segment length subequal to paramere (ratio PL:AEL av. 1.00), base slightly angular and moderately inflated, apex developed into a bluntly rounded hook (ratio AEL:AELH av. 2.04). Female terminalia (Fig. 7 F–I, K, N–Q): proctiger dorsal surface more or less straight but moderately to strongly convex apically, apex bluntly rounded, longer than subgenital plate (ratio FP:FSP av. 1.49), anal ring long (ratio FP:RL av. 2.04); subgenital plate with slight to more pronounced medial bulge ventrally, apex truncate and concave (more pronounced in form ovostriatus and only slightly in form orientalis ); ovipositor apex with serrations (3 pronounced lower, and either 3 pronounced upper in form ovostriatus , or 1-2 reduced upper in forms occidentalis and orientalis ), valvulae dorsalis strongly convex dorsally.

Egg.

Unpigmented or light brown, long to moderately long with striations over entire surface, but in form ovostriatus these are more widely spaced and interrupted, with the addition of distinctly raised dorsal ridges, in forms occidentalis and orientalis they are uninterrupted; pedicel absent, tail long in form ovostriatus (and composed of a curious structure of nodules), short in form orientalis , and apparently lacking in form occidentalis (Fig. 7J, L–M).

Immature.

Unknown.

Host plant notes.

Morphotype preference unknown.

Island.

Molokai, Maui.

Distribution notes.

Of the three recognized forms, form ovostriatus and form orientalis are currently only known from east Maui, and form occidentalis is only known from west Maui. Only one, diminutive sized female from Molokai was collected, and the distribution and form on this island remain to be confirmed.

Biology.

Unknown.

Etymology.

Named after Hina, a goddess of the moon in Hawaiian mythology (noun in the nominative singular standing in apposition to the generic name).

Comments.

Three forms are recognized (Figs 6-7): form ovostriatus (based on the type has a broader paramere, female subgenital plate more truncate and more notably concave apically, and distinct dorsal ridges on the egg), form occidentalis (smallest form, with more slender paramere), and form orientalis (largest from), both the latter have finely striated eggs lacking dorsal ridges. These forms are highly divergent for molecular data (to the extent that there is no support for a monophyletic Pariaconus hina ) (Fig. 3) but extremely similar morphologically and therefore may represent morphologically cryptic divergence.

Type material.

Holotype male (slide mounted, BMNH). See Table 2 for details of type and other material examined for this study.