Species Syndelphax euonymus (Fennah, 1965)

Museums

Regional Maps

• Toya euonymus Fennah, R.G. 1965. Delphacidae from Australia and New Zealand (Homoptera: Fulgoroidea). Bulletin of the British Museum (Natural History) Entomology 17(1): 1-59 [57].

  Type data:

   Holotype BMNH BM 1935–240 ♂ (coll.: 11-18.iv.1935, R.E. Turner), Tambourine Mtns, SE Queensland.

Generic Combinations

• Syndelphax euonymus (Fennah, 1965). —
  Fennah, R.G. 1975. Homoptera: Delphacidae from Ceylon. Entomologica Scandinavica. Supplementum 4: 79-136 [109]

Introduction

This species was originally described and figured by Fennah (1965) as a species of Toya based on two male specimens in SE Queensland. It was subsequently redescribed and refigured by Fennah (1975) from a series of males from several locations in Sri Lanka.

Distribution

States

Queensland

IBRA and IMCRA regions

IBRA

Qld: South Eastern Queensland (SEQ)

Ecological Descriptors

All stages: phloem feeder.

Diagnosis

Fuscous; carinae of head and pronotum, antennae, clypeus, rostrum, tegulae, mesonotum at lateral angles and along posterior margin, and legs, testaceous; posterior margin of pronotum broadly white. Tegmina hyaline, veins very dilute testaceous, almost concolorous. Wings hyaline with dilute testaceous veins. Vertex shorter submedially than broad at base (about 1 : 1.2), obtusely rounding into frons, slightly narrower at apex than at base, lateral margins straight, apical margin truncate, with submedian carinae very weakly prominent. Y-shaped carina distinct, submedian carinae uniting at apex of vertex or at extreme base of frons, basal compartment of vertex wider at hind margin than greatest length (2 : 1), and than median length (2.5 : 1); frons in middle line longer than wide at widest part (2.2 : 1), widest at two-fifths from base, lateral margins very feebly convex, median carina simple, or forked at extreme base; clypeus at base distinctly wider than frons at apex, postclypeal disc longer than broad at base (nearly 1.2 : 1), in profile moderately convex, anteclypeus in profile very shallowly convex, so that entire clypeus in profile is shallowly convex; rostrum short, attaining meso-trochanters; antennae distinctly surpassing frontoclypeal suture, basal segment longer than broad (1.6 : 1), second segment longer than first (2 : 1); ocelli distinct. Pronotum with disc shorter in middle line than broad at anterior margin (about 1 : 1.3), lateral carinae weakly concave, not attaining hind margin. Total length of mesonotum longer than that of scutellum (about 2.6 : 1). Post-tibial spur with 19 teeth. Anal segment of ♂ very short, ring-like, lateroapical angles rather closely approximated, each produced ventrad in a long slender spinose process. Pygofer moderately long, posterior opening as broad as long, dorsolateral angles not produced, diaphragm with dorsal margin deeply concave, very narrow at middle, where dorsal margin is produced in a pair of small acutely angulate lobes; medioventral process absent. Aedeagus moderately long, tubular, slightly broader in basal two-fifths than in distal three-fifths, orifice at apex, its lower lip produced caudad in an acuminate lobe [but see Fennah 1975, below]; aedeagus otherwise without ornamentation. Genital styles long, flattened and rather broad, slightly expanding distad, apical margin oblique, inner margin at base a little produced caudad. ♂: length, 3.0 mm, tegmen 3.1 mm (Fennah 1965).

"In the original description of this species it was stated that the dorsolateral angles of the pygofer are not produced, and that the lower lip of the orifice of the aedeagus is produced caudad in an acuminate lobe. However, the conformation of the pygofer is as in other members of the genus, with the entire upper half of the lateral margins being produced caudad in a broadly rounded lobe. Re-examination of the holotype has shown that there is a row of four minute spine-like processes at the lower margin of the orifice; as they lie in the same plane, they appear in lateral view as a single process" (Fennah 1975).

Diagnosis References

Fennah, R.G. 1965. Delphacidae from Australia and New Zealand (Homoptera: Fulgoroidea). Bulletin of the British Museum (Natural History) Entomology 17(1): 1-59 [57–58]

Fennah, R.G. 1975. Homoptera: Delphacidae from Ceylon. Entomologica Scandinavica. Supplementum 4: 79-136 [110]

History of changes