Dilacreon (Dilacreon) ispi Löcker, 2010

Löcker, Birgit, Fletcher, Murray J. & Gurr, Geoff M., 2010, Taxonomic revision of the Australian Eucarpiini (Hemiptera: Fulgoromorpha: Cixiidae) with the description of nine new species, Zootaxa 2425, pp. 1-31 : 12

Dilacreon (Dilacreon) ispi Löcker , sp. nov.

( Figs 5 , 15 )

Types. Holotype 3, AUSTRALIA, NT: Holmes Jungle, Palm Cr., 15 km NE of Darwin, 5 m, 14–15.iii.1961 (J.L. & M. Gressitt) (BPBM Nr 17162). Paratypes, NT: 3 Ƥ, same data (BPBM); 1 3, 1 Ƥ, same data, 11.iii.1961 (BPBM); 1 3, 1 Ƥ, same data, 13.iii.1961 (BPBM); 1 Ƥ, same data, light trap, 14.iii.1961 (BPBM).

Etymology. The term ‘ ispi ’ means ‘to hide’ in Meryam Mir, an aboriginal language spoken in the Torres Strait ( Thieberger & McGregor, 1994) and refers to the position of the anal style and 11th abdominal segment which are mostly concealed by the lobes of anal tube in lateral view.

Colour. As in D. (D.) akethe .

Morphology. Body length: 3 4.7–4.9 mm; Ƥ 4.9–5.2 mm.

Head: Vertex 2.2–2.5 times wider than long; with indistinct median carina. Frons 0.9–1.0 times as long as wide; frons distinctly visible in dorsal view. Rostrum just reaching hind coxae.

Thorax: Mesonotum with lateral carinae straight or slightly curved ( Fig. 5 C). Forewing 2.3–2.6 times longer than wide; with about 20–23 tubercles on costa; Sc+R fused, forming common stem Sc+R, M emerging separately from basal cell; Sc+R forking slightly basad or at same level as fork CuA1+CuA2; position of crossvein R-M basad or at same level as fork MA-MP.

Male genitalia: Anal tube ( Figs 15 C, D), apex of anal tube distinctly asymmetrical in dorsal view ( Fig. 15 C); apical lobes rounded; anal style and 11th abdominal segment mostly concealed by lobes of anal tube in lateral view ( Fig. 15 D). Genital styles as in Figs 15 E, F, with inner side of basal arm bearing small tooth. Ventromedian process triangular ( Fig. 15 E). Aedeagus as in Figs 15 A, B. Phallotheca dorsally with very short spine (a) directed caudad; right laterally with very long spine (b); left laterally with very long spine (d). Flagellum right laterally with moderately long spine (c) about midlength of flagellum.

Remarks. This species can be distinguished from the other two Australian species of Dilacreon by the position of the anal style and 11th abdominal segment, which are mostly concealed by the lobes of the anal tube in lateral view. In D. (D.) granulinervis and D. (D.) akethe large parts of the anal style and 11th abdominal segment are visible in lateral view.

Figures

FIGURE 5. Dilacreon (Dilacreon) ispi: A habitus lateral (holotype); B forewing (holotype); C dorsum (holotype); D face (holotype). Scalebar 1 mm applies to figure A.

FIGURE 15. Dilacreon (Dilacreon) ispi: A, B aedeagus (holotype), (A) left lateral (B) right lateral; C, D anal tube (holotype); E, F genital styles (holotype).