Taxonomic study of the genus Evergestis Hübner, 1825 (Lepidoptera: Crambidae: Glaphyriinae) in Iran with description of a new species
Author
Alipanah, Helen
Author
Khodadad, Masoumeh
Author
Rajaei, Hossein
Author
Haseli, Mohammad
text
Zootaxa
2018
4420
1
1
33
journal article
30081
10.11646/zootaxa.4420.1.1
a3ea0a39-5d5d-4f18-a4b2-4c3aa667f06f
1175-5326
1247134
70B25E60-2637-4D35-8837-14A0796D82B1
Evergestis caesialis
(Herrich-Schäffer, 1840)
Material
examined.
HMIM
:
Iran
,
Fārs
Prov.:
1 ♂
,
Estahbān
,
Koregarmedun
,
1750 m
,
21.x.1997
,
Moghaddam
, N.
Nazari
,
Barāri
leg.
;
SMNK
:
1 ♂
,
Iran
,
Elburz
,
Lar valley
, e
8000 ft
, E P
.
Wiltshire
,
5.–13.vii.1939
(ex coll.
H. G. Amsel
),
1 ♂
1 ♀
, Z-Afghanistan,
Koh-i-Baba
, S-Seite
Panjao
,
2650 m
,
20.–22.vii.1966
,
H. G. Amsel
leg. (ex. coll.
H. G. Amsel
) (GS: HA-2037, HA-2038).
Distribution.
Italy
, SE Europe,
Morocco
,
Syria
,
Iran
(Shahkuh, Binalud Mt., Soltanabad,
Tehran
, Shiraz, Komehr,
Elburz
Mt., Nesa, Lar valley, Kandovan Rd., Alvand),
Afghanistan
(
Zerny 1914
,
1939
;
Amsel 1953
,
1961
,
1970
;
Goater 2005
).
FIGURE 5.
Female genitalia. A, D, G)
Evergestis caesialis
. B, E, H)
E. comealis
stat. n.
C, F, I)
E. shirazalis
. A, B, C: main body in lateral view. D, E, F: colliculum and posterior end of ductus bursae. G, H, I: signa.
Remarks.
As our knowledge goes, four subspecies are known for this species that all, except the nominative, have been described from
Iran
(
Zerny 1939
;
Amsel 1953
,
1961
; Nuss
et al
.
2003–2017
).
Evergestis caesialis mellealis
was collected from Kandovan Rd. in
Alborz
Prov., in the north of
Iran
(
Zerny 1939
) and both
E. caesialis shirazalis
and
E. caesialis comealis
from Komehr in
Fars
Prov., in the south of
Iran
(
Amsel 1953
,
1961
). In 1961,
E. caesialis shirazalis
was raised to the species level,
E. shirazalis
, by
Kuznetsov (1958)
. There was no specimen of
E. caesialis mellealis
to be examined in the current study but since those Iranian specimens loaned from SMNK had been identified as
E. caesialis
and collected in the same locality of
E. caesialis mellealis
(see material examined), these specimens were considered to be
E. caesialis mellealis
. Having said this, the single male Iranian specimen in HMIM collected from
Fars
(see material examined), which was expected to be
E. shirazalis
based on the collecting locality, is quite similar to the loaned specimen from SMNK. Therefore, it seems that
E. caesialis mellealis
can be raised to the species level; however this needs the specimens from the
type
series of the nominative subspecies, which were not available to study.
As later discussed below, owing to the considerable variation between the examined
E. caesialis
(possibly
E. caesialis mellealis
) with
E. caesialis comealis
specimens of Amsel's collection (including the type specimen of the latter subspecies) and those
E. caesialis comealis
specimens preserved in HMIM,
E. caesialis comealis
is here raised to the species level.
Diagnosis.
As already mentioned above, according to
Amsel (1951)
E. caesialis
is similar to
E. affinis
externally. The differences of these two species have here been explained and figured (
Figs 1A–D
,
2A–J
). The male and female genitalia of the loaned specimens (from
Afghanistan
and Lar valley) of Amsel's collection were compared with those explained and illustrated by
Kuznetsov (1958)
and
Goater (2005)
, revealing that
E. caesialis
was mistakenly explained and illustrated by
Goater (2005)
.
A close resemblance of
E. caesialis
to
E. shirazalis
was stated by
Kuznetsov (1958)
. As noted by him, these two species can easily be distinguished from each other in the shape and width of uncus, length of gnathos in relation to uncus, teeth on the ventral surface of gnathos and bending angle of distal end of phallus to its proximal end (
Kuznetsov 1958
). Examining of the
type
specimen of
E. shirazalis
showed that the latter character was not informative (see
Figs 2E–I
,
7B, E, H
). Moreover,
Kuznetsov (1958)
stated that in
E. caesialis
cornuti included of two irregular groups of small spines; while in the examined material only one group of small spines was observed, even before preparing permanent slides (
Figs 2E, I
). The female genitalia of
E. caesialis
and
E. shirazalis
are also similar to each other (
Figs 5A, C, D, F, G, I
). The main defferences are in the length of antrum and shape of sclerotized structures of signa. In
E. caesialis
anrum is longer than that of
E. shirazalis
(
Figs 5A, C, D, F
). Sclerotized plates of signa in both species are almost triangular; however in
E. caesialis
each plate has a truncated tip comparing to relatively pointed tip in
E. shirazalis
.
The size of plates in
E. caesialis
, as stated by
Kuznetsov (1958)
, is also larger than
E. shirazalis
(Figs G, I).