Latissima isleyensis, Löcker, 2020

Löcker, Birgit, 2020, Revision of the Australian planthopper genus Monomalpha Emeljanov with the description of the new genus Latissima (Hemiptera: Auchenorrhyncha Fulgoromorpha: Cixiidae: Cixiini), Zootaxa 4858 (3), pp. 375-393 : 389-391

Latissima isleyensis sp. nov.

( Figs 2 , 7 , 8 , 12 , 13B )

Zoobank registration: http://zoobank.org/ urn:lsid:zoobank.org:act:5FE89468-E939-4D23-85D6-8C182F12E38D

Types. Holotype, 1 ♂, AUSTRALIA, Qld : Isley Hills, 17.03S 145.42E, 1050 m, pyrethrum, trees & rocks, 30.xi.1993 (Monteith & Janetzki) ( QM T246785 ) . Paratypes, Qld: 1 ♂, Atherton, 19.viii.1943 (R.V. Southcott) ( SAMA) ; 2 ♀, Thornton Peak, via Daintree, N.Qld, 1100-1300m, 24-27.ix.1984 (G.B. & S.R. Monteith) ( QM) .

Etymology. Named after Isley Hills, where the holotype was collected.

Colour. Head and pronotum light brown (rarely mid brown). Mesonotum slightly darker. Forewings light brown, veins and tubercles concolorous with cells, slightly darker towards apex of forewing. Legs light brown, darker towards distal end of legs. Body mid to dark brown.

Morphology. Body length: ♂ 5.7–5.8 mm; ♀ 5.4–5.6 mm.

Head: Vertex 0.7–0.8 x as long as wide; slightly wider at base than at apical carina or about the same; subapical carina v- to u-shaped; lateral carinae slightly to moderately elevated; median carina of vertex covering 1/2 to 1/3 of entire length of basal compartment; angle formed by caudal border of vertex obtuse. In dorsal view head including eyes slightly to moderately narrower than pronotum. Frons 0.8 x as long as wide; maximum width of frons no more than twice apical width; median carina on frons complete, moderately developed; lateral carinae of frons in facial view convex, rectilinear apically or sinuate, s-shaped. Frontoclypeal suture strongly semicircular, bent upwards, median part reaching and surpassing lower margin of antennal scape. Postclypeus with well-developed median carina and lateral carinae.Anteclypeus with weakly developed median carina; lateral carinae only present near frontoclypeal suture. Median carina on anteclypeus about as highly elevated than on postclypeus or less.

Thorax: Hind margin of pronotum obtusely angled. Forewing 2.7 x longer than wide; costal margin with 28–33 tubercles; crossvein r-m 1 distinctly distad of or at same level as fork MP1+2 and MP3+4; tubercles of forewing concolorous with veins; transverse veinlet m-cu 1, where it inserts at CuA, distinctly basad of transverse veinlet r-m 1; transverse veinlet m-cu 1, where it inserts at MP3+4, moderately basad of transverse veinlet r-m 1; icu, where it inserts at CuA, distinctly distad of apex of clavus; RP trifid; additional subapical cell between branches of RP present; MP1+2 bifid or trifid; CuA1 apically unforked or bifid; CuA2 apically unforked; CuA1 and CuA2 apically unforked; crossvein m-cu 2 (delimiting subapical cell C4) distinctly distad of crossvein icua (delimiting subapical cell C5); subapical cell C5 2–4 x longer than subapical cell C4. Hind leg: tibia with 2–3 small to large lateral spines and 6 apical spines; 1 st tarsomere with 7 apical teeth and no platellae, fourth tooth (counted from the outer side) longer (= protruding further towards second hind tarsomere) than third tooth; 2 nd tarsomere with 7 apical teeth, no platellae, but 3 very fine setae.

Male genitalia: Anal tube as in Figs 12 D-E. Pygofer and genital styles as in Figs 12 F-G. Aedeagus ( Figs 12 A- C): Phallotheca dorsally with a strongly curved spine (a), forming a semicircle; ventrally with a very long, slightly curved spine (b); right laterally with a medium sized, slightly curved spine (c). Phallotheca ventrally with a bifurcate ventral process on a long stalk. Flagellum with a short, sclerotised spine.

Female genitalia: Segment IX truncate, with a concave disc divided in half by a groove, waxplate absent. Ovi- positor very long, sabre-shaped, slightly curved upwards, protruding much further than anal style ( Fig. 2 ). Anal tube long (about as long as wide), widening towards apex. Anal style long (about as long as dorsal length of anal tube), about twice as long as remainder of 11 th segment.

Distribution: Qld.

Figures

FIGURE 2: Female genitalia: Latissima isleyensis.

FIGURE 7. Latissima isleyensis (holotype): A habitus; B–D head and thorax; E hind tibia and tarsi.

FIGURE 8. Latissima isleyensis (holotype): forewing.

FIGURE 12. Latissima isleyensis (holotype): A aedeagus left lateral; B aedeagus ventral; C aedeagus right lateral; D–E anal tube; F–G genital styles.

FIGURE 13. Known distribution of: A Monomalpha; B Latissima.