A Taxonomic Revision of the Genus Cionus (Coleoptera, Curculionidae) from the Oriental Region

Simple Summary Cionus Clairville, 1798, is a genus of weevils distributed in Palaearctic, Afrotropical and Oriental regions. It belongs to the large subfamily Curculioninae of the family Curculionidae. This paper reviews all valid extant Oriental species of the genus based on morphological characters for the first time, describes one new species and gives a replacement name to another species due to primary homonymy. This is the third and final part of the revision of this genus after previous recent revisions of Palaearctic and Afrotropical species. Descriptions or redescriptions, illustrations of habitus and male genitalia, comparative biological notes, distribution, a detailed list of all examined specimens and a key to treated species are given. Abstract Oriental species of the genus Cionus are herein revised for the first time. Eight species are recognized as distinct based on morphological characters of adults. One species is described as new: C. ottomerkli sp. nov., from India, whereas the name vossi (nom. nov.) is proposed for Cionus flavoguttatus Voss, 1957 (not Stierlin, 1893). The following new synonymy is established: Cionus indicus Desbrochers des Loges, 1890 (=Cionus albosparsus Faust, 1898 syn. nov.). Lectotypes of Cionus albosparsus Faust, 1898; Cionus flavoguttatus Voss, 1957; Cionus indicus Desbrochers des Loges, 1890; Cionus obesus Pascoe, 1883; and Cionus tonkinensis Wingelmüller, 1915, are designated.


Introduction
The genus Cionus Clairville, 1798, belongs to the tribe Cionini (Curculioninae, Curculionidae). Its distribution, as well as that of the whole tribe, includes Palaearctic, Afrotropical and Oriental regions, whereas it is absent, except for the accidental recent introduction of Cionus scrophulariae (Linnaeus, 1758), in Northeastern USA and Canada, as well as in the Nearctic, Neotropical and Australian regions. Currently, apart from Cionus, this tribe is composed of six other genera: Cionellus Reitter, 1904; Cleopus Dejean, 1821; Nanomicrophyes Pic, 1908; Patialus Pajni, Kumar and Rose, 1991; Stereonychidius Morimoto. 1962; and Stereonychus Suffrian. 1854. Cionus is the genus with the most species; it currently comprises about 120 valid species. In contrast, Cleopus, Stereonychus and Nanomicrophyes each includes less than ten species, and the other three genera include only one or two species. Recently, species of Cionus from the Palaearctic and Afrotropical regions were revised [1,2]. The following is the revision of the Oriental species, which have been very poorly studied.

Samples
About 250 specimens of Oriental Cionus were studied, including specimens of the type series of most taxa. Lectotypes were designated as appropriate according to Art. 74 and 75 of the International Code of Zoological Nomenclature [3], and all other specimens of the type series were labelled as paralectotypes. The rank of subspecific or infraspecific names

Acronyms and Abbreviations
Institutional depositories are abbreviated according to The Insect and Spider Collections of the World Website (http://hbs.bishopmuseum.org/codens/codens-inst.html, accessed on 20 May 2023). Abbreviations of host plant authors are reported only when mentioned for the first time as acronyms following the generally accepted list of botanist abbreviations from Wikipedia (https://en.wikipedia.org/wiki/List_of_botanists_by_author_ abbreviation, accessed on 20 May 2023).

Remarks
The genus Cionus was recently redescribed in two comprehensive revisions [1,2]. It is, however, important to present a brief diagnosis of the genus by indicating characteristics that are useful to separate species treated herein from species of other genera of the Cionini occurring in the Oriental region.
The genus Cionus can be distinguished from other genera of Cionini by one very distinctive apomorphy: a more or less sharply incised emargination on the anterior margin of prosternum. Moreover, the head between eyes is always narrower than the rostrum at base. Elytra of many Palaearctic species are characterized by one dorsal and often also one preapical black tomentous perisutural macula, which is absent in some Palaearctic, all Afrotropical (except C. coniungens Caldara and Košt'ál, 2023) and all Oriental (except C. indicus Desbrochers des Loges, 1890) species. The mesosternal process is flat, blunt at posterior margin; V1 is always longer than V2-5 combined, and V1-2 combined are always markedly (approximately 2.5× to 7.0×) longer than V3-4 combined. Male genitalia are always without parameroid lobes; the spermatheca is similar in the shape among species, with robust body and long, thin, strongly curved cornu. Finally, unlike other genera of the Cionini, most species of Cionus have asymmetrical claws, with the outer claw being longer than the inner claw in males, especially on the protarsi.
In addition to the distinctive prosternal emargination, the genus Cionus differs from the following other genera of the Cionini present in the Oriental region by following character possession of two claws vs. only one claw in Stereonychus and Stereonychidius; asymmetrical claws in males of most species; more or less convex body outline in lateral view vs. Cleopus having body moderately flat; lack of a concave mesosternal process; and by a distinct fovea in anterior 2/3 of median portion of the metasternum vs. indistinct fovea in Patialus. (BMNH, paralectotype). As supposed by Marshall (1926) based on the original description, "C. indicus is only a damaged specimen of C. albosparsus lacking most scales".

List of Oriental Species
Diagnosis. Pronotum between midline and sides with two small tufts of erect white scales. Elytra with rounded, large black macula surrounded by whitish scales laterally reaching stria 2, which is slightly sinuate around the macula; all striae well visible. Claws asymmetrical in male.
Thorax. Pronotum black, with dense, moderately deep punctures, intervals between punctures narrow, smooth, shining, moderately visible between recumbent, moderately dense, elliptical (l/w 5-7) intermixed whitish and light brown scales, all directed forwards, between midline and sides with two small tufts of erect white scales; conical, transverse (Pw/Pl 1.70-1.75), widest at base, sides slightly rounded, moderately convex, without tubercles. Prosternum with anterior margin with deep emargination almost reaching coxae, margins of emargination flat, without canal. Scutellar shield subtriangular, with moderately dense intermixed whitish and light brown scales.
Elytra. Black, globose (El/Ew 1.01-1.04), widest at middle, at base distinctly wider than pronotum (Ew/Pw 1.80-1.86), moderately rounded, disc distinctly convex; interstriae slightly convex, with shallow, dense irregular punctures; scales mainly elliptical (l/w 5-7), recumbent, moderately dense, light brown, a few scales white, sparse, slightly broader than brown ones; before middle with large rounded macula of black scales covering interstriae 1 and 2 surrounded by whitish scales forming additional small rectangular spots on interstria 1 behind dark spot, in apical third and very small spot on interstria 5 between basal and middle third; striae moderately visible, with deep punctures, intervals between punctures narrow, at same level as interstriae, stria 2 only slightly sinuate around dark spot.
Comparative notes. This species is easily distinguishable from the other Oriental taxa of the genus by a spot of dark scales on the disk of elytra, similar to that in most Palaearctic species. In contrast, C. indicus lacks the apical spot.
Biology. One specimen was collected in Myanmar on Premna pyramidata Wall. ex Schauer (Lamiaceae). This finding of a single specimen is almost certainly an accidental occurrence.
Diagnosis. Rostrum long and thin, especially in female. Pronotum between midline and sides with two little spots of suberect white scales simulating small tubercles. Even elytral interstriae covered with whitish grey scales. Claws asymmetrical in both sexes.
Venter. Mesosternal process is slightly convex, moderately emarginate. Mesosternum as long as V1. Abdomen with dense, irregularly arranged, moderately deep punctures feebly visible between moderately dense, elongate (more elongate, hair-like along midline and on tuft on V2); V1 1.90-1.95× as long as V2; V1-2 4.77-4.80× as long as V3-4, V3-4 0.90-0.94× as long as V5. Comparative notes. Due to the length of the rostrum, especially in females, this species can be confused only with C. vossi from which it differs by the dorsal pattern similar to that of C. albopunctatus.
Biology. Collected on Radermachera gigantea (Blume) Miq. (Bignoniaceae), where the adults were observed "on the terminal shoots of saplings and on suckers from stumps of newly felled trees" [29].   Legs. Femora black with more or less dense whitish scales, with stout sharp teeth; tibiae black, without uncus; tarsi black, T1 1.2× as long as wide, T2 transverse, T3 distinctly bilobed, distinctly broader than T2, onychium slightly shorter than T1-3 combined; claws asymmetrical, with one claw being half as long as the other.
Penis. Figure 2d-f, body with subparallel sides, poorly sclerotized long flagellum, and two convergent, symmetrical long sclerites in its apical half.
Variability. Length 3.7-4.7 mm. There are no noteworthy differences among the few specimens examined.
Comparative notes. Due to the length of the rostrum, especially in females, this species can be confused only with C. vossi from which it differs by the dorsal pattern similar to that of C. albopunctatus.
Biology. Collected on Radermachera gigantea (Blume) Miq. (Bignoniaceae), where the adults were observed "on the terminal shoots of saplings and on suckers from stumps of newly felled trees" [29].
According to the Code [3] (Art. 57.2, 57.4) Voss' name cannot be used as valid because of primary homonymy with Cionus (Stereonychus) fraxini var. flavoguttatus Stierlin, 1893. The latter name is here considered available (i.e., subspecific) according to the Art. 45.5 and 45.6 because not used as "unambiguously infrasubspecific" by Stierlin [31] (see also Materials and Methods). Therefore, in the absence of synonyms (Art. 60.3) we propose the name Cionus vossi nom. nov. for C. flavoguttatus Voss, as an objective replacement by using the same type specimen (Art. 72.7).
Diagnosis. Rostrum medium thin, elongate. Pronotum without tubercles, with two small spots of recumbent white scales between the midline and sides. Even elytral interstriae covered with brown scales, interstria 1 at midlength with two rectangular spots of white scales.
Redescription. Female. Body. Stout, globose. Head. Rostrum medium thin, elongate (Rl/Rw 4.72-4.75, Rl/Pl 1.18-1.22), black, in lateral view moderately curved, slightly tapered from antennal insertion to apex; in dorsal view from base to apex almost parallel-sided; in basal half with recumbent, sparse, subtle, short (l/w 2-4) light brown scales. Head between eyes very narrow, 1/4 as wide as rostrum at base. Eyes flat. Antennae brown, inserted at midlength, scape long, funicle slightly shorter than scape, S1 moderately more robust than and as long as S2, 1.7× as long as wide, S2 twice as long as wide, S3-5 transverse, club elongate oval, regularly pubescent, slightly shorter than funicle.
Male. Unknown Variability. Length 3.7-4.7 mm. There are noteworthy differences among four specimens examined.
Etymology. We dedicate this species to Eduard Voss (1884-1974), one of the most eminent experts in Curculionoidea of the 20th century.
Comparative notes. This species as well as C. radermacherae is easily distinguishable from all other Oriental species bearing similar small spots of whitish scales on pronotum and elytra by the long and thin rostrum in females.
Distribution. Central and Southern India, Sri Lanka.

4.
Cionus meleagris Marshall (Figure 4a- Diagnosis. Rostrum stout, short in both sexes. Pronotum without tubercles, with small spots of light scales both on disc and at sides. Elytra with many light spots, with distinctly prominent, right-angled humeri. V2 in male with tuft of hair-like scales. Claws asymmetrical in male. Redescription. Male. Body. Stout, globose. Head. Rostrum stout, short (Rl/Rw 2.95-3.00, Rl/Pl 1.26-1.29), black, in lateral view weakly curved, slightly tapered from antennal insertion to apex; in dorsal view moderately enlarged from base to apex; with five distinct carinae (one median and two lateral at each side), with recumbent, moderately dense, moderately elongate (l/w 5-7) whitish and light brown scales near to apex. Head between eyes very narrow, 1/4 as wide as rostrum at base. Eyes flat. Antennae brown, inserted between middle and apical 1/3, scape long, funicle shorter than scape, S1 moderately more robust than and as long as S2, 1.8× as long as wide, S2 twice as long as wide, S3-5 transverse, club elongate oval, regularly pubescent, slightly shorter than funicle.
Legs. Femora black with intermixed dark brown and light brown scales, with stout sharp teeth; tibiae black, without uncus; tarsi brown, T1 1.3× as long as wide, T2 transverse, T3 distinctly bilobed, distinctly broader than T2, onychium as long as T1-3 combined; claws are asymmetrical, with one claw being 2/3 as long as the other.
Penis. Figure 4d-f, body with slightly convergent sides, blunted tip, very long thin flagellum bifurcated at base, and with two convergent symmetrical sclerites in its apical half.
Variability. Length 4.0-4.3 mm. There are no noteworthy differences among the specimens of the type series.
Comparative notes. This species differs from C. ottomerkli by the shorter rostrum, which is not tapered from the antennal insertion to the apex, the pronotum covered with small spots of light scales both on the disc and at sides, the elytral interstriae 8 and 9 only slightly sinuate.
Legs. Femora black with intermixed dark brown and light brown scales, with stout sharp teeth; tibiae black, without uncus; tarsi brown, T1 1.3× as long as wide, T2 transverse, T3 distinctly bilobed, distinctly broader than T2, onychium as long as T1-3 combined; claws are asymmetrical, with one claw being 2/3 as long as the other.
Penis. Figure 4d-f, body with slightly convergent sides, blunted tip, very long thin flagellum bifurcated at base, and with two convergent symmetrical sclerites in its apical half.

5.
Cionus ottomerkli sp. nov. (Figure 5a- , in lateral view moderately curved, very slightly tapered from antennal insertion to apex; in dorsal view of same width from base to apex; with distinct carina along midline, with recumbent, moderately dense, elongate (l/w 4-7) whitish and light brown scales near to apex. Head between eyes very narrow, 1/4 as wide as rostrum at base. Eyes flat. Antennae inserted between middle and apical 1/3, scape long, funicle shorter than scape, S1 slightly more robust than and as long as S2, twice as long as wide, S2 twice as long as wide, S3-5 transverse, club elongate oval, regularly pubescent, slightly shorter than funicle.
Variability. Length 4.2-4.5 mm. There are no noteworthy differences among specimens of the type series. Etymology. This species is named in memory of our friend and colleague Ottó Merkl (1957-2021), prematurely passed away, who kindly searched and sent us several specimens preserved in the collections (HNHM), which were very important for our study.
Comparative notes. This species is closely related to C. meleagris, from which it differs Legs. Femora with intermixed dark brown and light brown scales, with stout sharp teeth; tibiae without uncus; tarsi with T1 1.3× as long as wide, T2 transverse, T3 distinctly bilobed and distinctly broader than tarsomere T2, onychium as long as T1-3 combined; claws are asymmetrical, with one claw being 2/3 as long as the other.
Variability. Length 4.2-4.5 mm. There are no noteworthy differences among specimens of the type series.
Etymology. This species is named in memory of our friend and colleague Ottó Merkl (1957-2021), prematurely passed away, who kindly searched and sent us several specimens preserved in the collections (HNHM), which were very important for our study.
Comparative notes. This species is closely related to C. meleagris, from which it differs by the moderately longer rostrum being in lateral view tapered from the antennal insertion to the apex, the pronotum densely covered with light scales at its sides, distinctly sinuate elytral interstriae 8 and 9 in their basal third.
Distribution. Southern India (Tamil Nadu). Non-type material examined. No other specimens apart from those of the type series.
Diagnosis. Pronotum distinctly conical, with rectilinear sides, two small tubercles, and many small spots of light scales of which two cover tubercles. Elytra with many small light spots, interstria 3 at base moderately carinate. Claws in male slightly asymmetrical.
Redescription. Male. Body. Stout, globose. Head. Rostrum stout, short (Rl/Rw 3.20-3.28, Rl/Pl 1.20-1.25), black, in lateral view moderately curved, slightly tapered from antennal insertion to apex; in dorsal view slightly enlarged from base to apex; with recumbent, sparse, subtle (l/w 3-6) whitish and light brown scales near to apex. Head between eyes very narrow, 1/4 as wide as rostrum at base. Eyes flat. Antennae dark brown, inserted between middle and apical 1/3, scape long, funicle shorter than scape, S1 slightly more robust than and as long as S2, 1.8× as long as wide, S2 twice as long as wide, S3-5 transverse, club elongate oval, regularly pubescent, slightly shorter than funicle.
Legs. Femora black with intermixed dark brown and light brown scales, with stout sharp teeth; tibiae black, without uncus; tarsi black with T1 1.4× as long as wide, T2 transverse, T3 distinctly bilobed and distinctly broader than T2, onychium as long as T1-3 combined; claws are asymmetrical, with one claw being 2/3 as long as the other.
Penis. Figure 6d-f, body with slightly convergent sides, blunted tip, long, thin, poorly sclerotized flagellum, and two convergent symmetrical sclerites in its apical half. long as wide, S2 twice as long as wide, S3-5 transverse, club elongate oval, regularly pubescent, slightly shorter than funicle.
Diagnosis. Rostrum stout, short. Pronotum with four small tubercles, numerous light scales on sides, some of them covering tubercles. Elytra with white scales forming many small spots on odd interstriae and largely covering humeri. Claws in males slightly asymmetrical.
Variability. Length 3.7-4.7 mm. Light scales on the pronotum vary from white to light yellow.
Comparative notes. This species is similar to C. albopunctatus and C. obesus, from which it differs by the stouter rostrum in lateral view being slightly wider at antennal insertion; denser scales at sides of the pronotum, humeri and episterna; four tubercles on the pronotum instead of two; stouter femora and narrower; and more regular striae.  Head. Rostrum stout, short (Rl/Rw 3.20-3.25, Rl/Pl 1.20-1.24), black, in lateral view moderately curved, slightly tapered from antennal insertion to apex; in dorsal view slightly enlarged from base to apex; with recumbent, sparse, subtle (l/w 3-6) whitish and light brown scales near to apex. Head between eyes very narrow, 1/4 as wide as rostrum at base. Eyes flat. Antennae dark brown, inserted between middle and apical 1/3, scape long, funicle shorter than scape, S1 slightly more robust than and as long as S2, 1.8× as long as wide, S2 twice as long as wide, S3-5 transverse, club elongate oval, regularly pubescent, slightly shorter than funicle.
Thorax. Pronotum black, with four small tubercles between middle and sides, with feebly visible, moderately deep dense punctures, intervals between punctures shining, finely rugose, hardly visible between recumbent, elliptical (l/w 4-7), whitish and dark brown scales, white scales more numerous at sides leaving only two areas of dark scales and covering tubercles; conical, transverse (Pw/Pl 1.67-1.71), widest at base, sides in basal 2/3 subrectilinear,then slightly sinuate, moderately convex. Anterior margin of prosternum with deep emargination, without canal. Scutellar shield cordiform, with dense light brown scales.
Legs. Femora black with intermixed dark brown and light brown scales, with stout sharp teeth; tibiae black, without uncus; tarsi black, T1 1.3× as long as wide, T2 transverse, T3 distinctly bilobed and distinctly broader than T2, onychium as long as T1-3 combined; claws are asymmetrical, with one claw being 2/3 as long as the other.
Penis. Figure 7d-f, body with subparallel sides, blunted tip, long, thin poorly sclerotized flagellum bifurcated at base, and two symmetrical poorly sclerotized sclerites with convergent sides in its apical half.
Variability. Length 3.7-4.7 mm. Light scales on the pronotum vary from white to light yellow.
Comparative notes. This species is similar to C. albopunctatus and C. obesus, from which it differs by the stouter rostrum in lateral view being slightly wider at antennal insertion; denser scales at sides of the pronotum, humeri and episterna; four tubercles on the pronotum instead of two; stouter femora and narrower; and more regular striae.

8.
Cionus obesus Pascoe (Figure 8a- Diagnosis. Pronotum with two small lateral tubercles more distinct due to tufts of erect white scales, and with other small spots of light scales. Elytra with many light spots, interstria 3 moderately carinate at base. Claws slightly asymmetrical in male. Redescription. Male. Body. Stout, globose. Head. Rostrum stout, short (Rl/Rw 3.20-3.24, Rl/Pl 1.12-1.15), black, in lateral view moderately curved, slightly tapered from antennal insertion to apex; in dorsal view slightly enlarged from base to apex; with recumbent, sparse, subtle (l/w 3-6) whitish and light brown scales near to apex. Head between eyes very narrow, 1/4 as wide as rostrum at base. Eyes flat. Antennae brown, inserted between middle and apical 1/3, scape long, funicle shorter than scape, S1 slightly more robust than and as long as S2, 1.8× as long as wide, S2 twice as long as wide, S3-5 transverse, club elongate oval, regularly pubescent, slightly shorter than funicle.
Variability.  mm. There are no relevant differences between the examined specimens.
Comparative notes. This species differs from the closely related C. albopunctatus by less conical pronotum with slightly rounded sides and more convex disc.
Legs. Femora black, with intermixed dark brown and light brown scales, stout sharp teeth; tibiae black, without uncus; tarsi black, T1 1.3× as long as wide, T2 transverse, T3 distinctly bilobed and distinctly broader than T2, onychium as long as T1-3 combined; claws are asymmetrical, with one claw being 2/3 as long as the other.
Penis. Figure 8d-f, body with subparallel sides, slightly emarginated blunted tip, long, thin, poorly sclerotized flagellum bifurcated at base, and two symmetrical, poorly sclerotized sclerites with convergent sides in its apical half.
Variability. Length 4.4-4.5 mm. There are no relevant differences between the examined specimens.
Comparative notes. This species differs from the closely related C. albopunctatus by less conical pronotum with slightly rounded sides and more convex disc.

1.
Elytra with large spot of black scales on dorsum (Figure 1a)  Pronotum between midline and sides with two small spots of recumbent white scales. Even elytral interstriae covered with brown scales; interstria 1 at midlength with two rectangular spots of white scales (Figure 3a) Integument black. Rostrum shorter, not tapered from antennal insertion to apex (Figure 4b,c). Pronotum with small spots of light scales on disc and at sides. Elytral interstriae 8 and 9 in basal third only slightly sinuate (Figure 4a

Discussion
The genus Cionus is poorly represented in the Oriental region in comparison to the numerous species occurring in the Palaearctic and the Afrotropical regions [1,2]. It is nevertheless possible that targeted collections could uncover other species; however, it should be pointed out that in all important collections we examined, specimens from the Oriental realm were rare. It seems that Cleopus and Stereonychus, represented with a few species in the Palaearctic region and lacking in the Afrotropical region, seem to be represented in the Oriental region by considerably more species than Cionus.
Among eight species presently known from this region, one (C. indicus) appears at first sight to be related to Palaearctic species due to the presence of a large broad spot of dark scales on the elytral disc. However, this spot may only be analogous and not homologous with the spot present in Palaearctic species. This supposition is supported by the fact that first and second elytral striae are almost rectilinear and not clearly sinuate in correspondence of the lateral margins of the spot. On the contrary, with the other seven species being mutually similar in regard to the pattern of the vestiture, they seem to be more related to Afrotropical species. It is noteworthy that in three species (C. albopunctatus, C. tonkinensis and C. obesus), the pronotum bears two or four small tubercles which are found in several species from South Africa and Madagascar but are absent in all Palaearctic species. However, the male genitalia (body of penis with unusual apical sclerites) are clearly more similar to other Oriental species (see C. radermacherae and C. meleagris) than to Palaearctic species.
Information on the relationships between the species of various regions could be obtained by the knowledge of the host plants. It is well-known that most species of Cionus feed on species of the family Scrophulariaceae-Scrophularieae (mainly Verbascum and Scrophularia) for the Palaearctic species, and Buddlejeae (Buddleja) for the Afrotropical species-whereas one Eastern Palaearctic species (C. helleri Reitter, 1904) lives on Paulowniaceae (Paulownia tomentosa (Thunb.) Steud.) and two Afrotropical species (C. perlatus Faust, 1885; and C. tristis Boheman, 1838) live on Bignoniaceae (Stereospermum kunthianum Cham. and Rhigozum obovatum Burch respecrively) [1,2]. Unfortunately, the available biological data on the Oriental species are very little. However, two of them, C. radermacherae and C. albopunctatus, were collected on Bignoniaceae-Radermachera gigantea (Blume) Miq. [29] and Dolichandrone stipulata (Wall.) Benth. et Hook., respectively-whereas a third species, C. indicus, was collected on Lamiaceae (Premna pyramidata Wall. ex Schauer). Although this last datum needs confirmation, it is noteworthy that all of these host families belong to Lamiales and that the two abovementioned Afrotropical species living on Bignoniaceae are particularly similar in their morphology to the Oriental species.
We think that, only after a careful phylogenetic molecular study, it will be possible to hypothesize the origin of the dispersal of this genus. On the other hand, the presence of pronotal tubercles in some Eastern Palaearctic and Oriental species is also shared by members of the related genera Stereonychus and Cleopus, of which some still are to be described, and may shed further light on the relationship of the genera of the tribe.
Author Contributions: Both authors contributed equally to the design, analysis and writing of the paper. All authors have read and agreed to the published version of the manuscript.
Funding: This research received no external funding.

Data Availability Statement:
All data used in this study are based on dried insect specimens deposited in publicly accessible institutional depositories (listed in the section Depositories) or in depositories of our colleagues (ibid). All data used in this study are not a subject of any legal or commercial restriction.