Glenea coomani Pic, 1926 and its related species of South China with description of a new species

Abstract Glenea coomani Pic, 1926 distributed in Vietnam, Laos and China is redescribed, and its sibling species, Glenea neohumerosa sp. n. is described from China (Guangxi, Hainan and Fujian) and North Vietnam. They are separated from each otherby differences in genitalia, and apical teeth and maculae of elytra. Another four related species and one subspecies are illustrated with short notes and new localities, and the lectotype and paralectotype of Glenea tonkinea Aurivillius, 1925 are designated. A key to the related species is presented.


Introduction
Glenea coomani Pic, 1926 was originally described from North Vietnam, and G. humerosa Gressitt, 1940, described from Hainan Island, China had been synonymized with it by Breuning (1956). In the course of our study of saperdine beetles from South China, we confirmed their conspecific status based on the study of the type material. However, we sur-Redescription. Male (Figs 2-6): length: 11.5-14.2 mm, humeral width: 3.5-4.5 mm. Female (Fig. 1): length: 14.0-16.2 mm, humeral width: 4.5-5.4 mm. Body black, in part provided with white to pale yellow pubescent maculae. Head with white to pale yellow maculae on genae, borders of eyes, temple and two parallel stripes between upper eye lobes; antennae black, with thin, whitish pubescence on inner sides of first three segments and base of fourth segment, and scattered with short, black bristles on undersides of first seven segments. Prothorax with a medial white to pale yellow stripe, and each side white to pale yellow (Fig. 1a). Scutellum white to pale yellow. Elytra with suture narrowly white to pale yellow near base; each disc with 5 white to pale yellow maculae: a large oval spot close to suture at the end of basal 1/4; a smallest spot near the middle, far from suture; the third one large, oval, close to suture just behind the middle; the fourth medium in size, round, far from suture; an oblique transverse band just before apex. Ventral surface covered with dense white to pale yellow pubescence, thinly so along middle. Legs black, thinly pubescent. Pronotum and elytral bases with sparse, erect, black bristles.
Head hardly broader than prothorax, deeply, and in part densely punctured, feebly concave at vertex. Eyes deeply emarginate, inferior eye lobes subequal to (female), or 2 times as high as (male) genae below it, width much less than half of front. Antennae longer than body; scape slightly thickened apical without cicatrix nor a ridge; antennomere ratio (male): 12 : 3 : 21 : 16 : 16 : 15 : 14 : 13 : 13 : 12 : 13; (female): 15 : 4 : 24 : 17 : 17 : 16 : 15 : 14 : 14 : 13 : 13. Prothorax almost as broad as long (male) or broader than long (female), swollen laterally before middle; disc convex and somewhat deeply and closely punctured. Elytra prominently angulate at humeri, slightly narrowed apically; each with 2 humeral longitudinal ridges beginning after humeri and reaching near the apex, truncated apically, with short and small teeth at the suture and the outer angle, surface with coarse and irregular punctures. Legs stout, middle tibiae grooved, hind femur reaching fourth abdominal segment, first hind tarsal segment longer than (male), or nearly as long as (female) following two segments combined. Male claws: the anterior claws of the fore and mid tarsi are toothed at the base, but the tooth in the fore tarsus is very small (Fig. 5), the tooth in the mid tarsus is long (Fig. 6, almost same size of the normal claw). Female claws simple.
Male genitalia (Figs 7-11): Tegmen length about 3.0 mm; lateral lobes stout, each about 0.6 mm long and 0.3 mm wide, with fine haired ridge at the base (in ventral view), apex nearly truncated and with fine setae which are shorter than lateral lobes; ringed part elbowed in the widest portion, converging; basal piece bifurcated distally (Fig. 9); median lobe plus median struts moderately curved, a little longer than tegmen (6:5); the median struts about one half of the whole length of median lobe; dorsal plate shorter than ventral plate; apex of ventral plate narrowly pointed, with sharp apex which is always curved to right side (in ventral view, Fig.  10); median foramen elongated triangular, with a small projection in lateral view; internal sac about 3 times as long as median lobe plus median struts, with 4 pieces of basal armature, 2 bands of supporting armature and 3 rods; the two longer rods each about 1.6 mm, shorter than tegmen, the short middle rod about 1.1 mm long.
Ejaculatory duct single. Tergite VIII (Fig. 8c) broader than long, apex truncated with middle slightly projected, setae near lateral corner dense and long, and sparse and short around middle.
Remarks. Based on the study on the types and material from type localities, we agreed with Breuning (1956) that G. humerosa Gressitt, 1940 is conspecific with G. coomani Pic, 1926. Though the holotype of G. humerosa Gressitt (Fig. 2) has the middle oval pubescent spot reaching suture and seems to be different from the type of G. coomani Pic (Fig. 1), the male (Fig. 4)   3.2-3.9 mm. Body black, in part provided with thick, white (dry and old specimens, Figs 14-15) to yellow (alive or fresh specimens, Figs 12-13) pubescent maculae. Head black, frons with two white or yellow stripes (almost fused in male, Fig.  14h) from inner side of antennae insertions along eyes and genae to clypeus (Fig.  15h), temple white or yellow (Fig. 12a), vertex with two parallel stripes (usually fused) between upper eye lobes; antennae black, scattered with short, black bristles on undersides of first seven segments. Prothorax with a medial white or yellow stripe, each side white or yellow except a transverse black vitta (Fig. 12a). Scutellum white or yellow. Elytra without surural stripes, each disc with 5 white or yellow maculae: two spots at basal 1/4, the one near suture much bigger than the one near margin; a moderate sized oval spot at middle, near suture; the fourth one smaller than middle one, closer to lateral margin than to suture, at the centre of apical half; an oblique transverse band just before apex. Ventral surface covered with dense white or yellow pubescence, thinly so along middle. Legs black, thinly pubescent. Pronotum and elytral bases with sparse, erect, black bristles.
Head hardly broader than prothorax, deeply, and in part closely punctured, feebly concave at vertex. Eyes deeply emarginate, inferior eye lobes subequal to (female) or 2 times as high as (male) genae below it, width much less than half of frons. Antennae longer than body, male longer than female; scape thicknened apical without cicatrix not a ridge; antennomere ratio (male): 12 : 3 : 18 : 15 : 14 : 13 : 13 : 12 : 12 : 11 : 12; (female): 13 : 3 : 21 : 17 : 16 : 15 : 14 : 14 : 13 : 12 : 13. Prothorax almost as broad as long (male) or broader than long (female), swollen laterally before middle, disc convex and somewhat deeply and closely punctured. Elytra rounded at humeri, slightly narrowed apically, each with 2 humeral longitudinal ridges beginning after humeri and reaching close to apex, truncated apically, with short and small teeth at the suture, long and sharp spine at the outer angle, surface with coarse and irregular punctures. Legs stout, middle tibiae grooved, hind femur reaching middle to apex of third abdominal segment, first hind tarsal segment longer than (male), or nearly as long as (female) following two segments combined. Male claws: the anterior claws of the mid tarsi with a short (half of the normal claw) tooth (Figs 17-18), fore and hind tarsi with simple claws (Fig. 16). Female claws simple.
Male genitalia (Figs 19-21): Tegmen length about 1.9 mm; lateral lobes slender, each about 0.6 mm long and 0.2 mm wide, with finely haired ridge at the base (in ventral view, Fig. 20), apex obliquely rounded and with fine setae which are shorter than lateral lobes; ringed part elbowed in the widest portion, converging; basal piece bifurcated distally; median lobe plus median struts moderately curved, subequal to tegmen in length; the median struts about one half of the whole length of median lobe; dorsal plate shorter than ventral plate; apex of ventral plage (Fig. 20) pointed, apex not so sharp and not curved to right side; median foramen elongated with a projection in lateral view (Fig. 19b); internal sac about 3 times as long as median lobe plus median struts, with 4 pieces of basal armature, 2 bands of supporting armature and 3 rods; the two longer rods each about 1.2 mm, shorter than tegmen, the short middle rod about 0.7 mm long. Ejaculatory duct single. Tergite VIII (Fig. 21c) longer than broad, apex rounded, setae near lateral corner dense and long, and sparse and short around middle.
Female genitalia (Figs 22-23): spermathecal gland located at the base of spermathecal capsule. Spermathecal capsule with a curved basal stalk and a rounded apical orb, stalk more than twice the length of capsule. Diagnosis. Differs from long spine elytron (Fig. 35) species G. laodice Thomson, 1879 (Fig. 27) and G. subalcyone Breuning, 1964 (Figs 28-29) in elytron having five white or yellow maculae instead of six, and their positions different. Differs from G. coomani and other short tooth elytron (Fig. 34) species in elytral apex having a long and sharp spine at the outer angle. Differs from G. coomani also in male terminalia: tergite VIII with apex rounded instead of truncated; lateral lobes of tegmen slender, the length ratio of lateral lobes to tegmen much bigger; apex of ventral plate not so sharp and not curved to right side.

Etymology. Named derived on similarity to and misidentification as G. humerosa by Gressitt and Hua (based on material deposited in SYSU and IZAS).
Remarks. The yellow color of the pubescence turns into white when the specimens are dried. Distribution

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Diagnosis. Differs from G. pici Aurivillius in having pubescent maculae white; in having different male claws. Differs from G. lacteomaculata Schwarzer in having spot at middle of elytron transverse, anterior claw in mid tarsus of male with long tooth (Fig. 31).
Lectotype designation. According to Aurivillius' original description, there were multiple type specimens, deposited in "Reichsmuseum in Stockholm und Collectio Pic". In order to fix the species concept and ensure universal and consistent interpretation of this species, we designate the male specimen in MNHN as the lectotype 8.5 mm long, 2.4 mm wide) and the female in NHRS as the paralectotype (Fig. 33)

Discussion
The above species are grouped as G. coomani group by the following characters (not meant to be presumed synapomorphies, but rather only for identification of species having similar makings): pronotum largely black, generally with a white or yellow median stripe; body covered with pubescence instead of metallic squama (such as the metallic green maculae of G. pici Aurivillius, 1925); elytron black with an apical spot and 4 or 5 unequal sized spots. They differ from G. relicta group by elytral spots (not include the band just before apex) with unequal size and located in different position.

1
Elytral apex only having a short tooth at the outer angle (subequal to that at the inner angle, Fig. 34 Elytron having only one big oval macula at basal fourth; the second macula located behind the basal one smallest (Figs 1-4)