Moth Taxon Search
Nagadeba indecoralis
Notes (optional)
RS: Nagadeba cinerea Hampson, 1895. The Fauna of British India including Ceylon and Burma. Moths, Vol.3. Taylor & Francis, London. Noctuidae (cont.) to Geometridae 546 p - 226 figs. Text at- https://archive.org/details/moths03hamp/page/52/mode/2up
N. cinerea and N. curvilineata have been synonymized in LepIndex and Funet. Hence, the only two species in the NE are N. castanealis and cinerea.
Hampson describes the difference as cinerea being more grey-brown rather than red. The prominent dentate submarginal line can be seen here and the HW of indecoralis can be compared against the cinerea description with this image (https://en.wikipedia.org/wiki/Nagadeba_indecoralis#/media/File:Nagadeba_indecoralis_09152.jpg)
Fahim's image shows a dentate submarginal line and is otherwise generally similar to indecoralis with the grey tinge and faded lines but is overall brown.
Nagadeba indecoralis is the most common one from the genus and has been photographed and reported from S India but the photographic records of the other 3 species are scanty. https://twmoth.tesri.gov.tw/peo/FBMothQuery?F=Erebidae&G=Nagadeba&S=Nagadeba%20indecoralis
N. indecoralis OD. https://archive.org/details/listofspecimenso3334brit/page/1521/mode/1up?view=theater
JD : agree with Rachit, & this can be compared with https://www.inaturalist.org/observations/196048
Nagadeba Walker, [1866] species known from India.
Nagadeba cinerea Hampson, 1895. India: Sikkim, Nagaland, Andaman Is.
Nagadeba indecoralis Walker, [1866]. India; Nepal; Myanmar; Sri Lanka.
Nagadeba polia (Hampson, 1891). India: “Nilgiris”.
Nagadeba castanealis Hampson, 1895. India: Sikkim, Nagaland.
For me this is a very close match with Nagadeba indecoralis Walker, [1866] with the red-brown visible on the wings. See https://www.inaturalist.org/taxa/204878-Nagadeba-indecoralis
GI: Some of the morphological features such as the tarsi colour are not available for comparison. There appears to be a mixture of features that are seen in cinerea and indecoralis. "dentate submarginal line" is seen in one of the indecoralis image on /twmoth.tesri.gov.tw. There is nothing in this image that can unambiguously point towards cinerea or indecoralis. Why not leave it at the Genus level or the time being. Collection of this species and further analysis is needed to confirm
My id: Nagadeba sp. or at best Nagadeba cf cinerea as its been photographed from North East
SS: I reviewed this species once again, examining images at https://oumnh.ox.ac.uk/collections-online#/item/oum-catalogue-388743. Here, it is clear that this is not cinerea, but indecoralis. All the images of cinerea are grey brown with no red-brown. Many of the images here have a pale medial band, that indecoralis lacks.
JD : have revisited this id, the descriptions by Hampson in MOI, & the Oxford University collections. The problem is that Hampson has done comparative descriptions of a new species castanealis with indecoralis, & then a new species cinerea with castanealis, & further another new species female curvilineata (syn. of cinerea) with cinerea. Looking at these, there are not much differences in all these species & this observation can also be considered as close to indecoralis as to cinerea. Considering that indecoralis is found in Myanmar, it is quite possible that it may extend to NE India. The Oxford collection is not of sufficient resolution to make out the markings but the specimens (except for one) of indecoralis are noticeably darker as with this observation & do not have a pale medial band on FW as mentioned above by Sanjay. Hence we may consider this id as indecoralis, with a cf.
N. cinerea and N. curvilineata have been synonymized in LepIndex and Funet. Hence, the only two species in the NE are N. castanealis and cinerea.
Hampson describes the difference as cinerea being more grey-brown rather than red. The prominent dentate submarginal line can be seen here and the HW of indecoralis can be compared against the cinerea description with this image (https://en.wikipedia.org/wiki/Nagadeba_indecoralis#/media/File:Nagadeba_indecoralis_09152.jpg)
Fahim's image shows a dentate submarginal line and is otherwise generally similar to indecoralis with the grey tinge and faded lines but is overall brown.
Nagadeba indecoralis is the most common one from the genus and has been photographed and reported from S India but the photographic records of the other 3 species are scanty. https://twmoth.tesri.gov.tw/peo/FBMothQuery?F=Erebidae&G=Nagadeba&S=Nagadeba%20indecoralis
N. indecoralis OD. https://archive.org/details/listofspecimenso3334brit/page/1521/mode/1up?view=theater
JD : agree with Rachit, & this can be compared with https://www.inaturalist.org/observations/196048
Nagadeba Walker, [1866] species known from India.
Nagadeba cinerea Hampson, 1895. India: Sikkim, Nagaland, Andaman Is.
Nagadeba indecoralis Walker, [1866]. India; Nepal; Myanmar; Sri Lanka.
Nagadeba polia (Hampson, 1891). India: “Nilgiris”.
Nagadeba castanealis Hampson, 1895. India: Sikkim, Nagaland.
For me this is a very close match with Nagadeba indecoralis Walker, [1866] with the red-brown visible on the wings. See https://www.inaturalist.org/taxa/204878-Nagadeba-indecoralis
GI: Some of the morphological features such as the tarsi colour are not available for comparison. There appears to be a mixture of features that are seen in cinerea and indecoralis. "dentate submarginal line" is seen in one of the indecoralis image on /twmoth.tesri.gov.tw. There is nothing in this image that can unambiguously point towards cinerea or indecoralis. Why not leave it at the Genus level or the time being. Collection of this species and further analysis is needed to confirm
My id: Nagadeba sp. or at best Nagadeba cf cinerea as its been photographed from North East
SS: I reviewed this species once again, examining images at https://oumnh.ox.ac.uk/collections-online#/item/oum-catalogue-388743. Here, it is clear that this is not cinerea, but indecoralis. All the images of cinerea are grey brown with no red-brown. Many of the images here have a pale medial band, that indecoralis lacks.
JD : have revisited this id, the descriptions by Hampson in MOI, & the Oxford University collections. The problem is that Hampson has done comparative descriptions of a new species castanealis with indecoralis, & then a new species cinerea with castanealis, & further another new species female curvilineata (syn. of cinerea) with cinerea. Looking at these, there are not much differences in all these species & this observation can also be considered as close to indecoralis as to cinerea. Considering that indecoralis is found in Myanmar, it is quite possible that it may extend to NE India. The Oxford collection is not of sufficient resolution to make out the markings but the specimens (except for one) of indecoralis are noticeably darker as with this observation & do not have a pale medial band on FW as mentioned above by Sanjay. Hence we may consider this id as indecoralis, with a cf.
Observation Reference