Id help for Acosmeryx sp.

[ButterflyWitch]

Hello Dr. Seow Sir
Acosmeryx is another complicated genus for me...
Need you guidance...
Thank you in advance...

1.
1.jpg

2. Acosmeryx pseudonaga?
2.jpg

3. Acosmeryx pseudonaga?
3 A.jpg

4. Acosmeryx pseudonaga?
4.jpg

5. Acosmeryx omissa?
5.jpg

6. Acosmeryx pseudonaga?
6.jpg

7. Acosmeryx pseudonaga?
7.jpg

8.
8.jpg

9.
9.jpg

10. Acosmeryx sericeus?
10.jpg

11.
11 A.jpg
11.jpg

12. Acosmeryx shervillii?
12.jpg
12 A.jpg

13.
13.jpg

14. Acosmeryx sinjaevi?
14.jpg
14 a.jpg

15. Acosmeryx sericeus?
15.jpg

16. Acosmeryx anceus?
16.jpg

17.
17.jpg

[Psyche]

1. Acosmeryx pseudonaga.

FW margin smooth & entire without a mid margin angulation.
FW postmedial oblique crossing from costa to tornus.
Antemdial equally dark before the discal spot.
FW without a defined triangualr costal patch.
https://www.flickr.com/photos/jatishwor/15770858880/
https://www.flickr.com/photos/gancw1/3909344279/

A. shervillii is similar lighter with only the postmedial dark.



2, 3, 4,
Acosmeryx anceus.
FW with a prominent mid margin angulation.
FW with a pale costal triangle.
FW postmedial dark ,the ouer arm angular to tornus, the inner arm down to dorsum(lower margin)
https://tpittaway.tripod.com/china/a_sud.htm
https://www.projectnoah.org/spottings/27525118

[Psyche]

5. Acosmeryx pseudonaga.
FW costal pale triangle diffusely extend to outer margin.
FW postmedial dark, the inner arm weak, pale; antemedial dark.



6, 7, 8,
Acosmeryx anceus.
FW with mid margin angulatio & a defined costal triangle.

[Psyche]

9 & 10.
Acosmeryx pseudonaga.
FW without mid margin angulation
FW costal triangle diffusely extend to outer margin.( not defined)
Postmedial & antemedial dark. Postmedial inner arm obsolete.

11.
Acosmeryx anceus.
FW with mid margin angulation & defined pale costal triangle.

[Psyche]

12.
Acosmeryx shervillii.
As in A. pseudonaga.
Pale ,only the postmedial dark., its inner arm obsolete.
http://www.jpmoth.org/~dmoth/Digital...shervillii.htm

A. omissa is similar but the inner border of the dark postmedial is sharply defined.
https://tpittaway.tripod.com/china/a_omi.htm


13, Acosmeryx anceus.
Defined pale costal triangle.
Postmedial branching & forming a quadrate patch with a pale centre.
https://tpittaway.tripod.com/china/a_sud.htm

[Psyche]

14 & 15.

Acosmeryx sericeus. Correction 14 is A. pseudonaga ,15 is A. sericeus.
FW without a defined costal triangle. Marking edged whitish eg FW basal patch.
FW postmedial branches into two arms, the outer fairly smooth & not broadly angulated. ;inner arm narrow & dark.
Additinal feature A. pseudonaga have smooth wing margins & A. sericeus crenulate margins.
https://tpittaway.tripod.com/china/a_sri.htm


A. A. sinjaevi is not found in India.
FW postmedial straight & ending just above the tornus.
https://tpittaway.tripod.com/china/a_sin.htm


16 & 17.
Acosmeryx anceus.

A. castanea looks similar to A. anceus but the inner arm of the postmedial is absent or weak.
FW mid margin not angulated.
https://tpittaway.tripod.com/china/a_cas.htm



TL Seow: Cheers.

[ButterflyWitch]

Thank you so much sir...��

[Psyche]

These Hawkmoths can be very confusing.
The more you look at them the more you suspect it is a different species.
I am reasonably confident most of the IDs are correct except perhaps no. 14.

I thought I'll put them in a key that can compare their features easier.
I follow Holloway in using the term postmedial, medial & antemedial.
Medial refers to any markings in the medial zone , the central zone around the discal spot.
Postmedial is any markings in the postmedial zone ie just outside of the medial zone.
Antemedial is any markingd in the antemedial zone just inside of the medial zone.
In Acosmeryx it is the postmedial which is prominent and dark.


A. FW without a defined triangular costal patch, the pale region continues to the outer margin.The postmedial runs obliquely to the tornus.

1A. pseudonaga ; Dark & contrasted ,the postmedial curved , the outer margin slightly angled.An inner narrow arm may be weakly present. Wing margins smooth.
https://www.flickr.com/photos/jatishwor/15770858880/

2. A. shervillii
Similarly marked to A. pseudonaga, the ground paler only the postmedial dark.
https://www.flickr.com/photos/gancw1/3909344279/

WEbsite contain both A. shervillii & A pseudonaga (then still combined as one species).
https://tpittaway.tripod.com/china/a_shv.htm

3. A. sericeus. FW postmedial bifurcate into two arms of equal darkness. Markings more contrasted with whitish edgings; Wing margins crenulate, with slight irregular undulations.
https://tpittaway.tripod.com/china/a_sri.htm

4. A. sinjaevi FW with a straight postmedial running from costa to just above the tornus.
https://tpittaway.tripod.com/china/a_sin.htm


B. FW with a pale costal triangle sharply defined. Postmedial outer arm is strongly angulated.

5. A. anceus.The two arms of the postmedial enclosed a quadrate space; FW with a prominent mid-margin angulation.
https://tpittaway.tripod.com/china/a_sud.htm

6. [I]A castanea./I] Similar to A. anceus but the inner arm of the postmedial is obsolete . FW margin smooth ,without a mid-margin angulation.
https://tpittaway.tripod.com/china/a_cas.htm


C. FW with less defined costal triangle with pale shading connecting it to the outer margin.

7. A. omissa. Postmedial is curved angled on the outer side & sharply defined on the inner side. Wing margins crenulate.
https://tpittaway.tripod.com/china/a_omi.htm

8. A. pseudomissa.Similar to A. omissa with the postmedial smoothly defined on the inner border. Wing margins entire, not crenulate.
https://tpittaway.tripod.com/china/a_pse.htm


TL Seow: Cheers.
Correction ;No. 14 is Acosmeryx pseudonaga The wing margins are smooth, not crenulate.
15 is correctly A. sericeus.