Pectinivalva acmenae
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Ordo: Lepidoptera
Familia: Nepticulidae
Genus: Pectinivalva
Name
Pectinivalva acmenae Hoare, Robert J. B., 2013 – Wikispecies link – Pensoft Profile
- Pectinivalva acmenae Hoare, Robert J. B., 2013, ZooKeys 278: 37-39.
Description
Description. Male (Fig. 12). Wingspan 4.5-5.5 mm. Head: frontal tuft ferruginous; collar inconspicuous, consisting of white, grey-tipped scales; eyecaps anteriorly white, posteriorly shining grey with bluish reflections; antennae shining dark grey, whitish beneath, ca. 35 segments. Thorax, tegulae and forewing uniform shining dark grey with strong blue reflections; an inconspicuous tornal spot consisting of a few white scales; cilia dark grey. Hindwing unmodified, pale grey; cilia pale grey. Under side: forewing grey with faint brassy reflections; hindwing grey. Abdomen shining dark grey; anal tuft inconspicuous, dark grey. Female (Fig. 13). Wingspan 5.2-5.6 mm. Similar to male, but antenna with 23-25 segments, and forewing rather broader. Wing venation as in Fig. 36. Abdominal tip not as broad and 'square' as in females of other Pectinivalva spp. Male genitalia(Figs 52-54, 66). Capsule ca. 425 [my]m long, forming a narrow triangle. Anterior edge of vinculum excavated in a half-oblong. Tegumen rounded, with ventral extensions on each side overlapping lateral arms of gnathos. Uncus rectangular, bilobed, lobes slightly produced, with 3 setae on each. Gnathos central element long, reaching just beyond uncus, ending in small swelling. Valva (Fig. 53) ca. 210 [my]m long, squarish, more rounded caudally and produced into a short point at exterior corner of apex; apical 1/2 with numerous spine-like setae on dorsal surface; pectinifer consisting of ca. 18 spine-like elements. Long sublateral processes present. Juxta a weak subcircular plate. Aedeagus (Figs 54, 66) ca. 510 [my]m long, a curved spine arising towards apex on left, a shorter spine to right of this one, a third spine in line with second and anterior to it. Vesica basally with cathrema surrounded by a field of many broad, short cornuti; a separate field of ca. 9 long narrow cornuti above opening of ejaculatory duct. Female genitalia(Fig. 77, 92-94). Total length ca. 760 [my]m. T9 prominent, with a group of 5-6 setae on each side. Apophyses anteriores rather narrow, curved inwards; apophyses posteriores narrow, straight, approximately equal in length to anteriores. Lateral sclerotizations of vestibulum strongly developed, forked, the bifurcations diverging widely, anterior pair blunt, posterior pair pointed. Ductus spermathecae with 41/2 convolutions. Posterior part of corpus broad, folded, without markings; anterior part rounded, with rows of inconspicuous pectinations; signum consisting of broken linear sclerotization surrounded by oval sclerotized ring with blunt dentitions. Larva. Green. Length of head ca. 440 [my]m; width ca. 350 [my]m. Thorax: prothoracic sternite in shape of Y with expanded base (Fig. 113); an additional small roundish sclerite on each side of this and antero-dorsal to SV and V group of setae. Chaetotaxy and spinosity: T2 with 11 pairs of setae (L3 present); otherwise as described for subgenus Casanovula. Anal rods distinctly forked posteriorly.
Biology and Ecology
Biology. Host plant: Syzygium smithii (Poir.) Nied. (Myrtaceae) (formerly Acmena smithii), common lilly pilly. Egg: almost invariably on upperside, usually near leaf margin. Mine (Fig. 120): a long, very narrow contorted gallery, filled with brown frass apart from irregular crenulations along mine edge; exit-hole on underside, a semicircular hole. Cocoon: reddish brown. Occupied mines were collected on 30 July and 3 August.
Diagnosis
Diagnosis. This is the one of three known species of Pectinivalva in which the forewings have a bluish lustre but no transverse fascia. The others are Pectinivalva xenadelpha and Pectinivalva quintiniae, both described and diagnosed below. There is an undescribed Australian species of Stigmella which sometimes occurs together with Pectinivalva (Menurella) acmenae, and in which the forewings are similarly unicolorous dark blue; however, the Stigmella species is distinctly larger (wingspan 6-8 mm), and has a collar consisting of white lamellate scales; its larva is a leaf-miner on Baloghia inophylla (G. Forster) P. Green (Euphorbiaceae).
Distribution
Distribution. New South Wales. Vacated mines probably of this species were seen abundantly along the coast near Manley, Sydney.
Taxon Treatment
- Hoare, Robert J. B.; Nieukerken, Erik J. van; 2013: Phylogeny and host-plant relationships of the Australian Myrtaceae leafmining moth genus Pectinivalva (Lepidoptera, Nepticulidae), with new subgenera and species ZooKeys, 278: 37-39. doi
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