10-11mm,
11mm. This species is very similar in its fawn/straw facies to S.
nesciaria and S. attentata. Indeed some of the specimens listed below
had been placed with nesciaria in the BMNH. There are major differences
in the male genitalia, where the species resembles attentata perhaps most
closely, especially ssp. nicobarica Prout: S. nesciaria has
distinctively bifid sclerotised processes to the valves. The capsule itself is
very much as in nicobarica, but the apical cornutus of the aedeagus is
straight rather than hooked. The cerata of the eighth sternite are strongly
asymmetric, the left being half the length of the right and very much more
strongly curved: the reverse is the case in nicobarica, though not to
such an extreme. S. sauteri Prout (Taiwan) appears also to be related,
though the left process of the eighth sternite is reduced to a short, straight
spine (slide 18455; holotype not examined). The pouch on sternite 2 is distally
bilobed in nesciaroides and nicobarica but not in sauteri. In
the female, the ductus is much more elongate, the base of the bursa less
sclerotised and the ostium more simple than in attentata, nesciaria and sauteri.
The genitalia are very close to those of S. undilinea Warren (New
Caledonia), illustrated by Holloway (1979: cerata viewed from dorsally rather
than ventrally), but they are relatively smaller in undilinea, the
sclerotised part of the valve more bulbous, apically rounded rather than acute.
Holotype .
SABAH: Ulu Dusun, 30 miles
W. of Sandakan, 28-31.1.1976 (E.W. Classey) BM geometrid slide 18373.
Paratypes: 2(slide, 18416, 18430), 1 (slide 18431) Pulo Laut, BORNEO (Doherty) June
'91.
Geographical range. Borneo, Sumatra, Siberut I.
Habitat preference. All material is from lowland localities.
11mm. This species is very similar in its fawn/straw facies to S.
nesciaria and S. attentata. Indeed some of the specimens listed below
had been placed with nesciaria in the BMNH. There are major differences
in the male genitalia, where the species resembles attentata perhaps most
closely, especially ssp. nicobarica Prout: S. nesciaria has
distinctively bifid sclerotised processes to the valves. The capsule itself is
very much as in nicobarica, but the apical cornutus of the aedeagus is
straight rather than hooked. The cerata of the eighth sternite are strongly
asymmetric, the left being half the length of the right and very much more
strongly curved: the reverse is the case in nicobarica, though not to
such an extreme. S. sauteri Prout (Taiwan) appears also to be related,
though the left process of the eighth sternite is reduced to a short, straight
spine (slide 18455; holotype not examined). The pouch on sternite 2 is distally
bilobed in nesciaroides and nicobarica but not in sauteri. In
the female, the ductus is much more elongate, the base of the bursa less
sclerotised and the ostium more simple than in attentata, nesciaria and sauteri.
The genitalia are very close to those of S. undilinea Warren (New
Caledonia), illustrated by Holloway (1979: cerata viewed from dorsally rather
than ventrally), but they are relatively smaller in undilinea, the
sclerotised part of the valve more bulbous, apically rounded rather than acute.