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Nygmia
amplior Collenette comb. n. & stat. rev.
Euproctis amplior Collenette, 1930, Trans. ent. Soc. London, 78:
70.
Euproctis amplior Collenette; Holloway, 1976: 46.
Euproctis catala Swinhoe sensu Schintlmeister, 1994:
135.
Nygmia
amplior 
Nygmia
amplior
(montane) |
Nygmia
amplior
Nygmia
amplior 
(montane) |
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Diagnosis. Both sexes slightly resemble semifumosa Holloway, but the males
have usually more dark grey on the hindwing, a more even scattering of black
scales on the forewing, and a definite postmedial fascia. The females lack the
forewing white patches of semifumosa, and there are also genitalic
differences as illustrated. Males could also be confused with those of xanthomela
(see Nygmia xanthomela
Walker comb.rev.), where the postmedials are weaker, more diffuse, but joined
by a similarly diffuse antemedial.
Taxonomic notes. Placement of this species in synonymy with catala (= xanthomela)
by Schintlmeister (1994) is unjustified, as the genitalia of the type match
those of xanthomela as discussed under that species. Schintlmeister noted
some variation in the valve of male genitalia of amplior within Sumatra,
and this is also seen in Borneo. Typical amplior is mainly montane, with
reduced black on the hindwing, other material having this more extensive. A
similar range of hindwing blacking and variation in the valve and aedeagus
vesica is seen in Bornean material, the specimens with reduced black on the
hindwing again being montane. Possibly a species complex is involved, but no
consistent pointers to this were found in the specimens dissected.
Geographical range. Sumatra, Borneo.
Habitat preference. Most records are from lowland dipterocarp forest but
the species also occurs in the lower montane zone at about 1000m, with one
record on Bukit Pagon, Brunei, at 1670m. The form with reduced yellow on the
hindwing was recorded from 1200m to 1620m on G. Kinabalu.
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