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Comprehensive Description

provided by Smithsonian Contributions to Zoology
Micrerethista denticulata

MALE (Figures 129–131).—Forewing length 4–7.8 mm.

Head: White to pale gray, heavily irrorated with dark brown to fuscous, subapically banded scales; scale apices 2 or 3 dentate. Antenna ~45–57-segmented, 0.4 the length of forewing; flagellum with dorsum entirely covered with broad white scales over basal , becoming grayish brown and more slender over distal ; white scales slightly irrorated with dark apices; basal flagellomeres bifasciculate, with a pair of slightly raised tubercules ventrally, bearing a cluster of 5 or 6 elongate sensilla trichodea 1–2× diameter of flagellomere in length; apical flagellomeres gradually becoming more filiform over distal one-half. Labial palpus similar to head in color except covered laterally with more fuscous scales; 5–6 fuscous piliform scales arising laterally and concentrated around apex of second segment.

Thorax: Dorsum similar to head in color except darker, with more fuscous-tipped scales and a few scattered, pale golden brown scales; a raised cluster of more elongate, darker scales on mesoscutellum. Venter similar to head in color. Forewing white to light gray with variably scattered, fuscous-tipped scales forming a barred or spotted pattern; costal area usually the palest, with heavier irroration of fuscous posterior (dorsal) to radius and with largest fuscous spot at distal end of cell; darker area usually with scattered, broad, pale golden brown scales; hind (dorsal) margin with a pair of small tufts near basal and ; fringe with series of fuscous banded, white scales and a single prominent, subterminal band. Hindwing paler, usually gray, sometimes with a pale golden luster. Legs as described for subfamily.

Abdomen: Pale grayish brown dorsally, irrorated with dark brown; venter white, less irrorated with dark-tipped scales. Coremata present on A8.

FEMALE.—Length of forewing 6–9.5 mm.

Head: Similar to male in color. Antenna ~52–59-segmented, 0.33 length of forewing; flagellum similar to male except not as fasciculate and with shorter sensilla trichodea, approximately equal in length to diameter of flagellomere.

Thorax: Similar to male in color pattern.

Abdomen: Similar to male in color except A7 entirely covered with long white scales that overlie dense, pale grayish corethrogyne.

MALE GENITALIA (Figures 175–180).—Anterior margin of vinculum slightly concave on either side of saccus, the latter usually slender, sometimes broad with width about 0.5 length; length ~0.15 the length of valva. Valva with dorsal lobe moderately slender at base, width less than 0.25 length; apex slightly upturned; ventral lobe ~0.55 the length of dorsal lobe. Aedoeagus with 1–3 pairs of minute spines along lateral rim of phallotreme; basal keel well developed, ~0.28 the length of aedoeagus; base of aedoeagus cylindrical; ejaculatory duct not coiled.

FEMALE GENITALIA (Figures 321, 322).—Ventral margin of ostium V- to U-shaped. Antrum gradually flared caudally, short, ~0.15 the length of entire ductus bursae, length nearly twice width; ductus bursae with a slender, linear band of spicules from below antrum to corpus, expanding in width near junction with corpus.

HOLOTYPE.— THAILAND: Doi Pui, Chiang Mai, 1300 m, 1–4 Sep 1987, Moriuti, Saito, Arita, & Yoshiyasu, slide DRD 3917, (UOP).

PARATYPES.—BRUNEI: Bt Bedawan, 1700 ft [578 m]: 1, slide BM 26087, (BMNH). Labi Road at mile 5, 15 m: 1, 20 Dec 1979, R. Fairclough, secondary vegetation, (BMNH). Lamunin, Sg Burong, water tanks, 60 m: 1, 17–30 Sep 1992, G. Robinson, disturbed lowland forest, slide BM 27878, (BMNH). Mumong, 3 m: 1, 26 Nov 1979, R. Fairclough, secondary & coastal vegetation, slide BM 27617, (BMNH). Rampayoh R[iver], 300 ft [91.4 m]: 3, 1, 11–19 Mar 1989, G. Robinson, LP [= helicopter landing point] 195, dipterocarp forest, slides BM 26073, 27596, 27903, (BMNH); 150 ft [45.7 m]: 3, 1, 11–15 Apr 1988, G. Robinson, LP 291B, GR [= grid reference] 951 801, lowland dipterocarp forest, slide BM 27599, (BMNH). Telisai, 100 ft [30.5 m]: 5, 1, 13 Feb 1982, G. Robinson, kerangas forest, slides BM 27601, 27608, 27900, USNM 30829, (BMNH, USNM). INDONESIA: Sulawesi Utara: Danau Mooat, near Kotamobagu, 1200 m: 2, 1, 20–22 Oct 1985, Roy. Ent. Soc. Project Wallace, slides BM 27609, 27610, 27899, (BMNH). Dumoga-Bone National Park, “Clarke” Camp, 1140 m: 2, Mar 1985, 1, Oct 1985, lower montane forest, slides BM 27611, 27907, (BMNH); “Edwards” Camp, 664 m: 2, Mar 1985, slide BM 27635, 1, Oct 1985, lowland forest, (BMNH); G. Mogogonipa summit, 1008 m: 1, Oct 1985, slide USNM 30834, (USNM); “Hog's Back” Camp, 492 m: 1, Oct 1985, slide BM 27613, (BMNH); Plot B, 300 m: 1, Sep 1985, lowland forest, slide BM 27615, (BMNH). Peleng Island, 1°20′S, 123°10′E, Luksag, 300 m: 1, 25 Feb-4 Mar 1986, S. Nagai, slide DRD 3719, (UOP). JAPAN: Honshu: Osaka Prefecture: Iwawakisan: 1, 24 Jul 1966, T. Saito, slide DRD 3721, (UOP). Mt. Makio: 1, 22 Jun 1982, K. Yasuda, slide 3860, (SMC); 1, 13 Aug 1979, K. Yasuda, slide DRD 3863, (SMC); 1, 14 Aug 1982, K. Yasuda, slide DRD 3864, (SMC). MALAYSIA: Kedah: Gunong Jerai, 950 m: 1, 15–17 Aug 1991, G. Robinson, upper montane podocarp forest with Agathis, (BMNH). Sabah: Gunong Monkobo, 116.56E, 5.48N, 975 m: 4, 7–13 Aug 1987, K. Tuck, dipterocarp forest, slides BM 26088, 27614, 27898, (BMNH). Lahad Datu, Danum Valley Field Centre: 1, 10–11 May 1989, K. Tuck, steep partly logged valley near 63 km marker, slide BM 27883, (BMNH). Selangor: Bangi, UKM Campus, 70 m: 1, 25–26 Jul 1991, G. Robinson, lowland dipterocarp forest, (BMNH). Fraser's Hill, Jeriau Road, 1140 m: 1, 5–12 Aug 1986, G. Robinson, slide BM 27616, (BMNH). Fraser's Hill, Gap, 850 m: 1, 2–3 Nov 1989, G. Robinson & M. Tobin, slide BM 27884, (BMNH). THAILAND: Chiang Mai: Doi Pui, 1300 m: 3, 1–4 Sep 1987, Moriuti et al., slides DRD 3861, USNM 29966, (UOP, USNM). Ranong: Na Kha, ~250 m: 1, 15 Oct 1985, Kuroko, Moriuti, Saito, and Arita, slide USNM 31770, (USNM).

MAP 3.—Distribution of Micrerethista denticulata.

FLIGHT PERIOD.—Adults have been collected in every month of the year except January and May. Collecting records from Japan include only the summer months, June, July, and August. In the more tropical portions of its range, the species probably flies every month.

DISTRIBUTION (Map 3).—This species ranges widely through southeast Asia from Thailand and Malaysia, eastward to Sulawesi, and north to Honshu, Japan.

ETYMOLOGY.—Derived from the Latin denticulatus (with small teeth), in reference to the small spines bordering the phallotreme.
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bibliographic citation
Davis, Donald R. 1998. "A World Classification of the Harmacloninae, a New Subfamily of Tineidae (Lepidoptera: Tineoidea)." Smithsonian Contributions to Zoology. 1-81. https://doi.org/10.5479/si.00810282.597