Cechetra bryki Ivshin & Krutov

Ivshin, Nikolay, Krutov, Vadim & Romanov, Denis, 2018, Three new taxa of the genus Cechetra Zolotuhin & Ryabov, 2012 (Lepidoptera, Sphingidae) from South-East Asia with notes on other species of the genus, Zootaxa 4450 (1), pp. 1-25: 9-11

publication ID

https://doi.org/10.11646/zootaxa.4450.1.1

publication LSID

lsid:zoobank.org:pub:4EB291E9-75D9-46B3-8D77-B5D699D32AD3

persistent identifier

http://treatment.plazi.org/id/03DA8796-FFBC-FFEA-BBEA-FCD4FDCBFC87

treatment provided by

Plazi

scientific name

Cechetra bryki Ivshin & Krutov
status

sp.n.

Cechetra bryki Ivshin & Krutov  sp.n.

Holotype ♂, Nepal, Kathmandu [ Valley ], Mt. Pulchouki [Phulchoki], 2770m [ca. 2500m], 16.vii.1990, ex. T. Haruta, E92-29, Cadiou Coll. BMNH (E) 2008-107 [ NHMUKAbout NHMUK] ( Fig. 18View FIGURE 18). 

Paratypes. 1 ♂, Nepal, Kathmandu, Godaveri, Phulchoki , 2400m, 26.v.1989, leg. [H.] Schnitzler, Cadiou Coll. BMNH (E) 2008-107 [ NHMUKAbout NHMUK]  ; 6 ♂, India, Darjeeling, 3 miles Village, 29.vi.1986, leg. W. Thomas, 3, Cadiou Coll. BMNH (E) 2008-107 [ NHMUKAbout NHMUK]  ; 1 ♂, Nord-Vietnam, Mt. Fan-si-pan, Cha Pa , 1700m, NN (22.15’N 103.46’E), 8.-29.v.1993, leg. Sinjaev & Simonov, [ex] Museum Witt, Sphingid genitalia slide No. 748, BMNH (E) 2002-25 [ NHMUKAbout NHMUK]  ; 1 ♀ Burma, Mt. Victoria, Pakokku Chin Hills, 2600m, 2-31.v.1938, leg. G. Heinrich, Brit  . Mus. 1938-689 [ NHMUKAbout NHMUK]; 2 ♂, 3 ♀, [ India,] Darjiling , leg. F. Möller, Rothschild Bequest B  .M. 1939-1 [NHMUK]; 1 ♂, Bhutan, Buxa , Rothschild Bequest B.M. 1939-1 [ NHMUKAbout NHMUK]  ; 2 ♂, 1 ♀, [ India,] Sikhim [Sikkim], vii-ix, (from Fruhst. [ Fruhstorfer ]), Rothschild Bequest B.M. 1939-1 [ NHMUKAbout NHMUK]  ; 1 ♂, [ India,] Sikkim, 26.iv.1888, leg. O. Møller, Collection H  . J. Elwes, Rothschild Bequest B.M. 1939-1, Figured by Bernard D’Abrera [ d’Abrera ], 1986, in Sphingidae Mundi  [ NHMUKAbout NHMUK]  ; 1 ♂, China, Yunnan, Yuxi, Zhenyuan, Qianjiazhai , Ailaoshan Mt. , 2200 m, 1.viii.2011, leg. A. Kitching, 24°17'N, 101°15'E, ( BOLD sample id ARB00028595View Materials) [ CASIZ]GoogleMaps  ; 1 ♂, Burma, Kambaiti , 2000 m, 1.vi.1934, [leg.] F. Bryk. Cechenena lineosa  f. viridula Bryk 1944, type, coll. NHRS-TOBI 0 0 0 0 0 2260 [ SMNHAbout SMNH]  ; 1 ♂, Vietnam, Lao Cai Prov., Hoang Lien NP, Tram Ton , 1915 m, 22.3493723°N, 103.7704565°E, 8- 11.04.2010, leg. Papp LGoogleMaps  ., Peregovits L. & Soltész Z., VN 2010PL_4 [ HNHMAbout HNHM]  ; 1 ♂, Nepal, S Annapurna Mt., S Banthanti , 2400 m, 28°21'N, 83°42'E, 25-26.vi.2008, leg. N. Ivshin ( BOLD sample id BC- Ivsh 01013), coll. N. IvshinGoogleMaps  ; 1 ♂, Nepal, S Annapurna Mt., Pothana , 2000 m, 28°19'N, 83°50'E, 5-6.vii.2008, leg. N. Ivshin ( BOLD sample id BC-Ivsh01014), coll. N. IvshinGoogleMaps  ; 1 ♂, Nepal, Nagarkot , 1990 m, 27°43'N, 85°31'E, 23.v.2012, leg. A. Bezborodkin ( BOLD sample id BC-Ivsh04735), coll. A. BezborodkinGoogleMaps  ; 2 ♂, N Vietnam, Lào Cai, Trạm Tôn Pass, N. side Fansipan Mt. , 1940 m, 16.v.–12.vi.2009, leg. V. Kroutov ( BOLD sample ids: BC- KVIMG4015-17)  , coll. V.V. Krutov; 1 ♂, N. Vietnam, Lào Cai, Fansipan Mt. , 1940–2000 m, 25.iv.–15.v.2009, leg. V. Kroutov ( BOLD sample id BC-KVIMG4016-17), coll. V.V. Krutov  ; 1 ♂, Burma, Kachin, Putao, Chudu Razi Hills , 25–28.vii.2008, leg. local collector ( BOLD sample id BC-KVIMG9968-17), coll. V.V. Krutov  ; 7 ♂, N Vietnam, Lào Cai, Trạm Tôn Pass, N. side Fansipan Mt. , 1940 m, 16.v.–12.vi.2009, leg. V. Kroutov, coll  . V.V. Krutov; 1 ♀, N Vietnam, Lào Cai, Trạm Tôn Pass, N. side Fansipan Mt. , 1940 m, 16.v.–12.vi.2009, leg. V. Kroutov, coll  . V.V. Krutov; 2 ♂, China, Yunnan, Xinping, Mt. Ailaoshan , 2300m, vi.2017, leg. local collector, coll. V.V. Krutov. 

Total: 39 paratypes.

FWL: holotype: 51mm

Morphologically, C. bryki  is very similar to C. scotti  and C. lineosa  , but has a brighter green background with less prominent diagonal lines on the forewing upperside. The forewing ground colour is green (may be yellowishgrey, olive-grey or brownish-green in old or discoloured specimens) without the gradient in the green tone observed in C. lineosa  . The diagonal lines of the forewing upperside are weakly differentiated from the ground colour, with some, particularly the most distal one, barely visible, unlike C. subangustata  in which all eight dark green or brown diagonal lines are clearly visible. The outer edge of the black basal patch of the hindwing upperside extends along the veins. The female is similar to the male, but it is larger, with rounder forewings and with the black basal patch of the hindwing upperside with less pronounced sharp triangles extending along the veins.

The structures of the male genitalia ( Fig. 21View FIGURE 21) are within the range of variation of both C. lineosa  and C. scotti  ( Fig. 22–34View FIGURE 22View FIGURE 23View FIGURE 24View FIGURE 25View FIGURE 26View FIGURE 27View FIGURE 28View FIGURE 29View FIGURE 30View FIGURE 31View FIGURE 32View FIGURE 33View FIGURE 34) and are very different from those of C. minor  and C. pollux  ( Fig. 35View FIGURE 35, 36View FIGURE 36). The uncus lacks an acute sclerotized hook ventrally; the sclerotized process of the harpe is elongate, almost the same width over the entire length; and the margin of the basal plate of the phallus armature is deeply denticulate with a large apical hook distally (the basal portion of this hook is angled at about 30° to the phallus main axis). In male genitalia of the superficially similar but larger C. subangustata continentalis  ssp. n. (described below) ( Fig. 37View FIGURE 37), the uncus bears an acute tooth ventrally, the sclerotized process of the harpe is chunky, noticeably narrowing distally; and the phallus armature has a less denticulate plate and a short, small apical hook that is devoid of additional minute teeth on its surface (the basal portion of the hook is angled at about 45° to the phallus main axis). Generally, C. bryki  has thinner and more elongate male genital structures than C. subangustata  .

One mtDNA haplotype of C. bryki  is shown in Fig. 40. It is common to all six examined specimens and the Chinese specimen found in the BOLD database. The translated polypeptide sequence differs from the other Cechetra  species by one non-synonymic amino acid substitution.

Examination of the “type” of C. lineosa  f. viridula convinced us that it is just a discoloured specimen of C. bryki  . Another moth, in NHMUK, was illustrated by d'Abrera ([1987]: p. 205-206) as a “green form” of C. lineosa  , but he did not give any locality data. We have examined this specimen, which proved to come from Sikkim, India, and found that it, too, is a specimen of C. bryki  . We have thus included both these specimens in the paratype series of C. bryki  .

Overall, the current known range of C. bryki  encompasses areas in Northern India, Nepal, Myanmar, Southwestern China and Northern Vietnam at altitudes above 1900 m. It might also reasonably be expected to occur in the mountainous areas of Bhutan, Laos, Northern Thailand and Cambodia.

Currently, only one generation per year is known for C. bryki  , from the end of May until early August.

The larval hostplants of C. bryki  are currently unknown. The hostplants of the closely related C. lineosa  were listed by Bell & Scott (1937) as Impatiens  ( Balsaminaceae  ), Saurauia  ( Actinidiaceae  ), Polygonum  ( Polygonaceae  ) and Vitis  ( Vitaceae  ). All of these are members of early succession plant communities, which is typical for most hawkmoths of subfamily Macroglossinae  . This explains, for example, why C. lineosa  is a very common species in anthropogenic and disturbed plant communities. Such early succession communities at higher altitudes are usually microniches in late successional forests, known in the phytocenological literature as “gaps”, emerging due to rock collapse, windfalls and similar disturbances. Ecologically, C. bryki  is likely to belong to the fauna of equatorial cloud forests and have a patchy distribution due to origin and lack of persistence of its habitats.

Etymology. The species is named after the Swedish entomologist, anthropologist and writer, Felix Bryk, who described C. lineosa  f. viridula. We decided not to use the unavailable infrasubspecific name viridula but rather to propose a new name in accordance with the name availability criteria of the International Code of Zoological Nomenclature ( ICZN 1999, 2012).

NHMUK

Natural History Museum, London

SMNH

Saskatchewan Museum of Natural History

HNHM

Hungarian Natural History Museum (Termeszettudomanyi Muzeum)