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Research Article
Some taxonomic notes on the genus Oberea Dejean, 1835 from Asia (Coleoptera, Cerambycidae, Lamiinae)
expand article infoZhu Li, Giulio Cuccodoro§, Li Chen
‡ Southwest University, Chongqing, China
§ Muséum d’histoire naturelle, Genève, Switzerland
Open Access

Abstract

In the current work, the following taxonomic changes of genus Oberea Dejean, 1835 are proposed: O. flavescens Breuning, 1947, rest. stat.; O. toi Gressitt, 1939, rest. stat.; O. sylvia Pascoe, 1858, rest. stat.; O. taiwana Matsushita, 1933 = O. taihokuensis Breuning, 1962, syn. n.; O. sumbana Breuning, 1961 = O. antennata Franz, 1972, syn. n.; O. brevithorax Gressitt, 1939 is newly recorded from Vietnam.

Keywords

New country record, new synonym, Oberea, restoration name, taxonomy

Introduction

The genus Oberea Dejean, 1835, belonging to the subfamily Lamiinae, family Cerambycidae, consists of more than 300 species worldwide. The two monographic books on the taxonomy of Cerambycidae from China (Gressitt 1951) and Laos (Rondon and Breuning 1970), the most important works on Oberea in Asia, treated 77 and 20 Oberea species, respectively. Oberea worldwide was revised by Breuning (19601962). Some species were downgraded to infrasubspecific rank in Breuning’s work basing on the similarity of body coloration (Breuning 1960-1962), and some of them were restored or described as new species (Kurihara and Ohbayashi 2007; Kurihara 2009; Li et al. 2014, 2016). During the recent study, some further taxonomic clarification of the genus Oberea is presented in the current work, based on examination of types.

Material and methods

Pictures of adult morphology are composites taken using a digital camera mounted onto a Leica MZ Apo dissecting microscope and subsequently processed using Automontage® software. For detailed examination, genitalia were extracted from specimens softened in water, cleared in 10% KOH, observed in water on glass microscope slides, then transferred into ethanol 70% and stored in capsules mounted on the same pin as the specimens. Drawings were made using a drawing tube mounted onto a compound microscope.

The following collection abbreviations are used in the text.

BMNH The Natural History Museum, London, UK

MNHN Muséum national d’Histoire Naturelle, Paris, France

MHNG Muséum d’histoire naturelle, Geneva, Switzerland

MHNL Musée des Confluences, Lyon, France

NMB Musée d’Histoire Naturelle de Bâle, Basel, Switzerland

SWU Insect Collection of Southwest University, Chongqing, China

SYSU Sun Yat-sen University (ex Lingnan National History Museum or Zhongshan University), Guangzhou, China

Taxonomy

Oberea flavescens Breuning, 1947, rest. stat.

Figs 1, 2

Oberea flavescens Breuning, 1947: 146. Type locality: China, Sichuan.

Oberea atropunctata v. flavescens: Breuning 1962: 169.

Redescription

Body (Fig. 1) 17.5–17.9 mm long and 3.0 mm wide. Head ochreous, apical mandible dark brown; antennae reddish brown, scape dark brown; ventral surface (except the abdominal sternite II and III black) and legs pale yellowish brown, tarsi darker. Body clothed with short golden pubescence and some erect hairs on pronotum, base of elytra and ventral surface of the basal antennal segments. Head slightly narrower than prothorax, vertex distinctly depressed at middle with a groove; eyes very large, inferior lobes twice as long as the gena in male and 1.5 times in female. Antennae distinctively shorter than body, reaching the apical fourth of elytra, antennomere ratio: 12.3: 2.5: 16.0: 15.8: 15.8: 15.9: 15.7: 15.4: 13.5: 12.6: 12.5 in males and 14.1: 3.0: 14.8: 14.2: 14.1: 14.9: 15.3: 15.1: 14.8: 14.4: 13.6: 13.5 in females. Prothorax wider than long; apical and basal margins slightly emarginated; sides rounded at middle, slightly constricted basally and apically; pronotum raised in middle, finely and densely punctured. Scutellum squared, slightly emarginated. Elytra very long, nearly 5.5 times as long a humeral width, and 4.5 times as long as head and prothorax combined, slightly narrowed from behind base to apical quarter, basal punctured arranged in 6 longitudinal series, and the punctures large and deep at basal area, gradually finer and irregular towards apex. Metepisternum and sides of abdominal segments finely punctured. Hind femora reaching posterior edge of abdominal segment I; hind tibiae almost twice as long as tarsi. Abdominal sternite V with a shallow triangular concave in males and with a median longitudinal groove in females.

Figure 1.

Habitus of O. flavescens Breuning, 1947, a–c holotype, female, from Sichuan a dorsal view b lateral view c label (not to scale) d male, from Sichuan, dorsal view. Scale bar 5.0 mm.

Male terminalia: (Fig. 2) Tergite VIII broader than long, apex truncated and slightly emarginated, densely clothed with short setae (Fig. 2a); tegmen curved in profile, parameres elongate, mostly covered with long setae at the apical half; base of each parameres transversely and obliquely ridged on ventral side; the ridge covered with dense fine hairs (Fig. 2b-e); Median lobe 1.1 times as long as tegmen and slightly curved in profile; the median struts 3/5 times as long as the whole median lobe in length; dorsal plate slightly longer than ventral plate; apex of ventral plate rounded; median foramen rounded (Fig. 2f); endophallus with 2 pairs of rods at apical portion; longer pair very slender baculiform, about 3.5 times as long as shorter pair (Fig. 2g).

Figure 2.

Oberea flavescens, male genitalia, a tergite viii b tegmen, dorsal view c tegmen, lateral view d parameres, dorsal view e parameres, ventral view f median lobe, ventral view g sclerities in endophallus. Scale bar 0.5 mm.

Figure 3.

Habitus of O. toi Gressitt, 1939, holotype, female, from Guangdong, a dorsal view b lateral view. (not to scale).

Type material examined

Oberea flavescens Breuning: Holotype, ♀, Chine, Szetschuan, Tatsienlu (MNHG).

Additional material examined

China, Sichuan: 1♂, Chine, Szetschuan, Tatsienlu (MHNG) [a mislabeled paratype]

Distribution

China (Sichuan).

Remarks

This species was first described by Breuning in 1947 based on a specimen from Sichuan Province, China but it was downgraded to a variety of O. atropunctata Pic, 1916 in his revisionary work (19601962). A careful examination and comparison of the types of O. flavescens and O. atropunctata (Figs 45) show that they are different species. Oberea flavescens differs from O. atropunctata in having longer elytra and shorter antennae. They can be distinguished by having differently shaped male genitalia, the long pair of rods being 3.5 times as long as the short pair (1.5 times as long as in O. atropunctata) and the short pair consisting of two simple short rods.

Figure 4.

Habitus of O. atropunctata Pic, 1916, a–c holotype, female, from Yunnan a dorsal view b lateral view c label (not to scale) d–e male, from Yunnan d dorsal view, e lateral view. Scale bar 5.0 mm.

Figure 5.

Oberea atropunctata, male genitalia, a tergite viii b tegmen, dorsal view c tegmen, lateral view d parameres, dorsal view, e parameres, ventral view f median lobe, ventral view g sclerities in endophallus. Scale bar 0.5 mm.

Oberea toi Gressitt, 1939, rest. stat.

Fig. 3

Oberea toi Gressitt, 1939a: 106. Type locality: China, Guangdong.

Oberea atropunctata v. toi: Breuning 1962: 170.

Type material examined

Oberea toi Gressitt: Holotype, ♀, Lung-ping-hui, Lien District, N. Kwangtung Prov., 16. V. 1934, F. K. To Coll. (SYSU).

Additional material examined

China, Jiangxi: 1♀, Kiukiang (MNHG).

Distribution

China (Guangdong, Jiangxi).

Remarks

Oberea toi Gressitt, 1939 was originally described by Gressitt from Guangdong, China, and then was downgraded to a variety of O. atropunctata by Breuning (19601962). It was regarded as the synonym of O. atropunctata (Löbl & Smetana, 2010); however, the examination of the types shows that they are different species. Despite the similar color pattern of their bodies, O. toi differs from O. atropunctata in the following characters: antennae as long as the body in female, and hind femora exceeding the posterior edge of abdominal segment I. Therefore, we suggest restoring O. toi Gressitt, 1939 from synonymy of O. atropunctata Pic, 1916.

Oberea atropunctata Pic, 1916

Figs 4, 5

Oberea atropunctata Pic, 1916: 17. Type locality: China, Yunnan.

Description

Male terminalia: (Fig. 5) Tergite VIII broader than long, apex truncated and slightly emarginated, rounded at side, densely clothed with short setae (Fig. 5a); tegmen curved in profile, parameres stouter, mostly covered with long hairs; transverse and oblique ridge at basal lobe on ventral side with dense fine hairs (Fig. 5b–e); penis 1.25 times as long as tegmen and curved in profile; the median struts 4/5 times as long as the whole median lobe in length; dorsal plate slightly longer than ventral plate; apex of ventral plate rounded; median foramen rounded (Fig. 5f); endophallus with two pairs of sclerites apically, the long pair very slender baculiform, the short pair fused at base forming a “Y” (Fig. 5g).

Diagnosis

Body 17.9 mm long and 3.0 mm wide. The species is very similar to O. flavescens Breuning and O. toi Gressitt, especially in color patterns. The following combination of characters separates it from O. flavescens: shape of rods in the endophallus; elytra nearly 4.2 times as long as humeral width, and 3.7 times as long as head and prothorax combined.

Type material examined

Oberea atropunctata Pic: Holotype, ♀, Yunnan (MNHN).

Additional material examined

China, Sichuan: 1♂, Sichuan Province, 8.V.1985 (SWU); Yunnan: 1♂, China, Yun-nan-sen (MNHG).

Distribution

China (Sichuan, Yunnan).

Oberea taiwana Matsushita, 1933

Fig. 6

Oberea taiwana Matsushita, 1933: 423. Type locality: China, Taiwan.

Oberea taihokuensis Breuning, 1962: 168. Type locality: China, Taiwan. syn. n.

Oberea taihokuensis v. flavosternalis Breuning, 1962: 169. [Unavailable name according to ICZN, art. 10.2.]

Type material examined

O. taihokuensis Breuning: Holotype, ♀, Formosa, Taihoku, 20.IV.1932, coll. M. Chujo (MHNG).

Additional material examined

China, Taiwan: 1♂, Formosa, Kosempo (MHNG) [holotype of Oberea taihokuensis v. flavosternalis]; 1♀, Formosa, Kurau [a mislabeled Paratype].

Distribution

China (Taiwan).

Remarks

Matsushita described O. taiwana from Taiwan, China in 1933. In Breuning’s revision (19601962) on worldwide Oberea, O. taiwana Matsushita was recorded without examining types and O. taihokuensis was described as a new species in 1962. Kurihara and Ohbayashi (2007) revised the Oberea species from Taiwan and re-described O. taihokuensis based on the original description. According to the original description of O. taiwana, the type was deposited in Hokkaido University, but Dr. Kurihara could not find any type there (Kurihara in litt.). After having compared photo and description of O. taiwana in Kurihara and Ohbayashi’s publication (2007) and the holotype of O. taihokuensis, it is suggested that O. taihokuensis Breuning, 1962 is junior synonym of O. taiwana Matsushita, 1933.

Figure 6.

Habitus of O. taihokuensis Breuning, 1962, holotype, female, from Taiwan, a dorsal view b lateral view, c label (not to scale). Scale bar 5.0 mm.

Oberea sylvia Pascoe, 1858, rest. stat.

Figs 7, 8

Oberea sylvia Pascoe, 1858: 261. Type locality: “China, Borealis”.

Redescription

(Fig. 7). Body 12.5–13.5 mm long and 2.3mm wide. Head black except for labrum yellowish brown to reddish brown, maxillary palpus and labial palpus pale yellowish brown; antennae reddish brown, scape dark brown. Prothorax, elytra and ventral surface (except for the abdominal segment V black) ochraceous; legs yellowish brown, apical half of hind tibia and tarsi darker brown. Body clothed with short golden pubescence and some erect hairs on pronotum, base of elytra and ventral surface of the basal antennal segments. Head short, with distinctly depressed vertex; eyes very large, inferior lobes 2 times as long as the gena in male. Antennae of males longer than body, antennomere III longer than pedicel and antennomere IV. Prothorax 1.2 times wider than long, slightly constricted basally and apically; pronotum with a tubercle in middle, finely and densely punctured. Scutellum squared, slightly emarginated. Elytra nearly three times as long as humeral width, and 3.6 times as long as head and prothorax combined, slightly narrowed from behind base to apical quarter, apex truncate; basal disc with large and deep punctures arranged in line, punctures becoming gradually finer and irregular towards apical quarter. Metepisternum and sides of abdominal surface finely punctate. Metafemora reaching posterior edge of abdominal segment I; metatibiae almost twice as long as tarsi. Abdominal sternite V with a shallow triangular concave in males.

Figure 7.

Habitus of O. sylvia Pascoe, 1958, holotype, male, from North China, a dorsal view b lateral view c label (not to scale). Scale bar 5.0 mm.

Male terminalia. (Fig. 8) Tergite VIII broader than long, apex truncated and slightly emarginated, rounded at sides, densely clothed with long hairs and short setae (Fig. 8a); Tegmen curved and penis curved in profile, parameres mostly covered with long setae on the apical half; base of each lobe in ventral side transversely and obliquely ridged; the ridge with dense fine hairs (Fig. 8b–e); penis 1.2 times as long as tegmen, dorsal plate slightly longer than ventral plate; the median struts 3/5 times as long as the whole median lobe in length; apex of the ventral plate rounded; median foramen rounded (Fig. 8f); apical endophallus with 2 pairs of baculiform rods, the long pair 2.8 times as long as short pair (Fig. 8g).

Figure 8.

Oberea sylvia, male genitalia, a tergite viii b tegmen, dorsal view c tegmen, lateral view d parameres, dorsal view e parameres, ventral view f median lobe, ventral view, g sclerities in endophallus. Scale bar 0.5 mm.

Type material examined

Oberea sylvia Pascoe: Holotype, ♂, N. China (BMNH).

Additional material examined

China: 1♂, Chine (MHNL); 4♂♂, Chine (BMNH).

Distribution

East China.

Remarks

Oberea sylvia was originally described by Pascoe 1858 and regarded as synonym of O. nigriceps (White, 1844) (Breuning, 1962). After comparing the types, O. sylvia, which distinctly differs from O. nigriceps in male genitalia (Fig. 8), is restored to specific rank.

The holotype probably was collected by Robert Fortune. According to his book “Three years wandering in the north provinces of China”, the northern province of China included Shanghai, Zhejiang Province and Jiangsu Province; therefore “N. China” or “China borealis” might mean east China. Unfortunately, there is no detailed information about the location of the specimen that the first author examined.

Oberea brevithorax Gressitt, 1936

Fig. 9

Oberea brevithorax Gressitt, 1936: 108. Type locality: China, Taiwan.

Oberea brevithorax inepta Gressitt, 1939b: 122. Type locality: China, Fujian.

Oberea binotaticollis v. brevithorax: Breuning 1962: 193.

Oberea binotaticollis v. inepta: Breuning 1962: 193.

Oberea brevithorax: Kurihara and Ohbayashi 2007: 211.

Type material examined

Oberea brevithorax inepta Gressitt: Holotype, ♂, Cha Shan, Kien-ning District, Fukien Province, SE. China, VI. 22-28. 1933. D. C. Ngu coll. (SYSU).

Additional material examined

China, Zhejiang: 1♂, Zhejiang province, Lin’an city, West Tianmushan, Dajingwu, 30°22'18.86"N,119°26'03.81"E, 828m, 9–11. VII.2012, leg. Jianyue Qiu and Hao Xu (SWU); Vietnam, 1♂, Chapa, Tonkin, J. Clemont coll. (MHNG); 1 ♂, Chapa, Tonkin (MHNG).

Distribution

China (Fujian, Hainan, Zhejiang, Taiwan) ; Vietnam (new record).

Remarks

Oberea brevithorax was first described as a valid species by Gressitt in 1936 but was downgraded as a variety of Oberea binotaticollis Pic, 1915 by Breuning in his revision. Kurihara and Ohbayashi (2007) compared them and confirmed that they were two different species, easily distinguished from each other by different body proportions, antennal lengths, and male genitalia. The species was only recorded in China but recently, some specimens collected in Tonkin, Vietnam, were found in MHNG, and they are a new record to Vietnam.

Figure 9.

Habitus of O. brevithorax Gressitt, 1936, male, from Tonkin, a dorsal view b lateral view. Scale bar 5.0 mm.

Oberea sumbana Breuning, 1961

Figs 10, 11

Oberea sumbana Breuning, 1961: 131.Type locality: Indonesia, Sumba.

Oberea antennata Franz, 1972: 143. Type locality: Indonesia, Sumba. syn. n.

Type material examined

Oberea sumbana Breuning: Holotype, ♂, Sumba (MHNG); Allotype: ♀, Waingapoe, 96, [P.] Everett [printed label faded] (MHNG). Oberea antennata Franz: Holotype, ♂, O. Sumba: Melolo Iaewa, 28.V.1949, Dr. Bühler & Dr. Sutter leg. (NMB); Allotype: ♀, C. Sumba: Langgaliru, 6.10.1949. Dr. Bühler & Dr. Sutter leg. (NMB).

Distribution

Indonesia.

Remarks

After examining the holotypes of O. sumbana and O. antennata, it is concluded that O. antennata Franz, 1972 is junior synonym of O. sumbana Breuning, 1961.

Figure 10.

Habitus of O. sumbana Breuning, 1961, holotype, male, from Sumba, a dorsal view b lateral view (without abdomen) c abdomen, lateral view d label. (not to scale).

Figure 11.

Habitus of O. antennata Franz, 1972, a–c holotype, male, from Sumba a dorsal view b lateral view, c label (not to scale) d–f allotype, female, from Sumba d dorsal view e lateral view f label (not to scale). Scale bar 5.0 mm.

Acknowledgments

We are grateful to the following colleagues for the loan or gift of specimens upon which the present work is based: Mr. Gérard L. Tavakilian (MHNH), Ms. Azadeh Taghavian (MHNH), Mr. Maxwell V. L. Barclay (BMNH), Mr. Harold Labrique (MHNL), Prof. Hong Pang (SYSU), Mr. Hao Xu (Hunan Agricultural University, Hunan, China) and Ms. Jianyue Qiu (SWU). We want to express our special thanks to Dr. Takashi Kurihara (Ehime University, Japan) for providing his publications and other important information. We thank Dr. Francesco Vitali (Musée national d’Histoire naturelle de Luxembourg) and to both anonymous referees for improving the manuscript. The research is supported by the National Natural Science Foundation of China (No.31501882), the Fundamental Research Funds for the Central Universities (XDJK2015C056) and the China Scholarship Council (CSC).

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