Moth Taxon Search
Thysanoidma octalis
Notes (optional)
SS: I don't think this is Thysanoidma octalis. Observation MOI-pqy218 is also similar. For me there is also confusion whether this species displays sexual dimorphism. The OD description is that of a male. The description of Hampson, FBI, vol. 4, pg. 202 is the same description, but mentions that this is a female.
Thysanoidma octalis Hampson, 1891. Ill. typical Spec. Lep. Het. Colln Br. Mus. 8: 41, 142, pl. 156, f. 19, 12; TL: Nilgiris. Text at https://archive.org/details/illustrationsoft08brituoft/page/142/mode/1up?view=theater. Plate at https://archive.org/details/illustrationsoft08brituoft/page/n188/mode/1up?view=theater
Hampson, G. F. 1896. The Fauna of British India including Ceylon and Burma. Moths, Vol.4. Taylor & Francis, London. Pyralidae 594 p - 287 figs. Pg 202, #4657 & fig 120.
Needs investigation.
JR: I think the species T. octalis is not sexually dimorphic in wing pattern. For instance, compare the MOI observation pqv 468 which is a female, and cm 050 which is a male- both with similar wing maculation. However, after a careful analysis, I have found that there are two broad categories of the so-called T. octalis morphotypes . Firstly, the wing shapes- narrow winged: this observation and MOI pqy 218. Secondly, the gap between the antemedial and postmedial lines on the inner margin/ dorsum of forewings (widely separated in T. octalis original illustration, and MOI bz 818; and closely situated in this observation, as well as MOI pqy218, and MOI pqx 945). I am not considering ground-color that is mostly dark and light here, probably environmental. If we consider all these variations into account, the situation is super messy here. Either we are dealing with a group of complex species, or all corresponding multiple morphs of T. octalis. In my opinion, the second one seems like more plausible hypothesis to go with for now.
@SS, I am sharing a photo with you by email to illustrate on this further.
Thysanoidma octalis Hampson, 1891. Ill. typical Spec. Lep. Het. Colln Br. Mus. 8: 41, 142, pl. 156, f. 19, 12; TL: Nilgiris. Text at https://archive.org/details/illustrationsoft08brituoft/page/142/mode/1up?view=theater. Plate at https://archive.org/details/illustrationsoft08brituoft/page/n188/mode/1up?view=theater
Hampson, G. F. 1896. The Fauna of British India including Ceylon and Burma. Moths, Vol.4. Taylor & Francis, London. Pyralidae 594 p - 287 figs. Pg 202, #4657 & fig 120.
Needs investigation.
JR: I think the species T. octalis is not sexually dimorphic in wing pattern. For instance, compare the MOI observation pqv 468 which is a female, and cm 050 which is a male- both with similar wing maculation. However, after a careful analysis, I have found that there are two broad categories of the so-called T. octalis morphotypes . Firstly, the wing shapes- narrow winged: this observation and MOI pqy 218. Secondly, the gap between the antemedial and postmedial lines on the inner margin/ dorsum of forewings (widely separated in T. octalis original illustration, and MOI bz 818; and closely situated in this observation, as well as MOI pqy218, and MOI pqx 945). I am not considering ground-color that is mostly dark and light here, probably environmental. If we consider all these variations into account, the situation is super messy here. Either we are dealing with a group of complex species, or all corresponding multiple morphs of T. octalis. In my opinion, the second one seems like more plausible hypothesis to go with for now.
@SS, I am sharing a photo with you by email to illustrate on this further.
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