Uloma (Uloma) metogana Ren, 2004

Liu, Shan-Shan, Li, Xiu-Min & Ren, Guo-Dong, 2022, Uloma (Uloma) metogana Ren, 2004: redescription of the adult and descriptions of the larva and pupa (Coleoptera: Tenebrionidae, Ulomini), Zootaxa 5115 (1), pp. 79-90 : 82-88

publication ID	https://doi.org/ 10.11646/zootaxa.5115.1.5
publication LSID	lsid:zoobank.org:pub:4FD6D05D-274E-476F-BA44-36D5EF717B51
DOI	https://doi.org/10.5281/zenodo.6346091
persistent identifier	https://treatment.plazi.org/id/03FA87FA-FF53-890F-1CEC-FF7CFE2B6831
treatment provided by	Plazi
scientific name	Uloma (Uloma) metogana Ren, 2004
status

Treatment

Uloma metogana Ren in Ren et Yin, 2004: 69; Liu et Ren, 2013: 561. Type locality: China, Xizang, Mêdog.

Uloma (Uloma) metogana: Iwan et al., 2020: 392 .

Larva. Oligopod ( Fig. 2 View FIGURE 2 ). Body. Length 15.0– 15.5 mm. Body elongate, subcylindrical with sharp tail-end; evenly sclerotized dorsally and ventrally; yellowish brown, both ends dark brown. Vestiture smooth, suffused with relatively large conspicuous punctures.

Head. Head ( Fig. 3–5 View FIGURE 3 View FIGURE 4 View FIGURE 5 ) slightly narrower than width of prothorax, nearly hemispheric, slightly convex dorsally, relatively flat ventrally and with sparse long setae on anterior, posterior, and lateral margins. Frontoclypeal suture obvious, nearly straight. Frons flat, frontal sutures broad V-shape, incurved; frontal setae relatively long; median suture barely visible in dorsal view. Clypeus transverse, feebly convex, anterior margin slightly linear, and with four long erect clypeal setae. Labrum transverse, convex, anterior margin protruding with dense short marginal setae and four long erect median setae. Ocelli present. Antennae ( Fig. 3–5f View FIGURE 3 View FIGURE 4 View FIGURE 5 ) shorter than length of head, cylindrical; antennomere I subquadrate, II about twice as wide as long and 2.2 times as long as I, the sensorium nearly C-shaped, III thin and short, about 1/5 as long as II. Mandibles ( Fig. 3–5g View FIGURE 3 View FIGURE 4 View FIGURE 5 ) well developed, black, with elongate anterior extension; tridentate apically, apical tooth larger, dorsal tooth and ventral tooth smaller. Maxillae nearly parallelsided, with a small incision on apical margin; maxillary palpi ( Fig. 3–5h View FIGURE 3 View FIGURE 4 View FIGURE 5 ) subcylindrical, palpomere I transverse, II subquadrate, III slender. Labial palpi ( Fig. 3–5i View FIGURE 3 View FIGURE 4 View FIGURE 5 ) 2-segmented, short; ligula transverse, anterior margin protruding with two long erect setae. Mentum ( Fig. 3–5j View FIGURE 3 View FIGURE 4 View FIGURE 5 ) subcordate, anterior margin straight with two long erect setae on both sides and posterior part respectively, latter much thicker and longer.

Thorax. Thorax 3-segmented. Each thoracic tergum with long erect setae on sides of anterior and posterior margins. Prothoracic tergum subquadrate in dorsal view, about 3.0 times as long as meso- or metathoracic tergum. Meso- and metathoracic terga transverse, nearly rectangular in dorsal view. Mesothoracic spiracles ( Fig. 3–4d View FIGURE 3 View FIGURE 4 ) broadly oval, large, and approximately twice size of abdominal spiracles; spiracles lying on anterolateral margins of mesothoracic tergum, and near distinctly separate coxal cavity. Prothorax and metathorax without spiracle.

Legs. Pro-, meso- and metathoracic legs small, subequal in length ( Fig. 3–4a, b, c View FIGURE 3 View FIGURE 4 ). Each segment of prothoracic leg suffused with short spiniform setae unevenly; coxa thick, longer than other segments; trochanter and femur subequal in length and width; tibia much slenderer and shorter; tarsungulus falciform, with two thinner spiniform setae under it. Meso- and metathoracic legs similar to prothoracic legs.

Abdomen. Abdomen 9-segmented, slightly and gradually darker toward apex, and segments successively and slightly enlarged backwards. Tergites I–VIII wider than length, nearly rectangular in dorsal view, and with several long erect setae on sides of anterior and posterior margins. Sternites I–VIII nearly rectangular, and with a long erect seta near four corners respectively. Segment VIII with long erect setae densely, but without pleural sutures. Segment IX ( Fig. 3–6 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 ) with sparse long erect setae; parabolic form, length almost equivalent to its width, subcircular in cross-section, with a small papilla at tip-end ( Fig. 3–6k View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 ) but without urogomphi. Anal concealed in posterior part of abdominal tergum VIII, without anal tubes. Abdominal spiracles ( Fig. 3–4e View FIGURE 3 View FIGURE 4 ) round, lying on anterolateral margins of terga I–VIII.

Comment. Based on the specimens collected, we could not determine the exact stage of larvae. The description above is based on a specimen with more sclerotic and larger body size, which could be a later instar larva of Uloma (Uloma) metogana .

Pupa. Exarate ( Fig. 4 View FIGURE 4 ). Body. Length 10.5–11.0 mm, width 4.5–5.0 mm. Body form, length and most characteristics comparable to that of adults of same species. Body thick, elongate elliptical, extremely arched dorsally and with sparse setose tubercles; white to dark brownish, with darker apices of urogomphi and edges of lateral processes.

Head. Invisible in dorsal view ( Fig. 4–7 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 ). Smooth, with weak transverse wrinkles. Frons with sparse tubercles bearing short erect setae on anterior margin and lateral margins. Frontoclypeal suture obscure. Clypeus slightly linear at anterior margin, elevated with two small ridges at centre and with a tubercle bearing short erect apical setae separately on apices of two ridges and anterolateral clypeus. Labrum nearly broad semicircular, anterior margin deeply emarginate at centre, with sparse pubescence. Eye ovate, darker. Antenna thick, claviform, antennomere III–X gradually widening, XI semi-spherical, I–XI with sparse tubercles bearing short pubescence at each apical side. Mandible apices darker. Maxillary palpi and labial palpi visible clearly.

Thorax. Thorax 3-segmented. Pronotum slightly transverse, similar in shape to that of adults, about 1.3 times as wide as long, widest in middle. Pronotum with tubercles bearing yellow short erect apical setae ( Fig. 4–7, 4 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 –9), denser on anterior and posterior margins, but sparser on lateral margins and disc. Disc slightly convex, with a transverse-elliptical shallow anterior impression. Anterior margin slightly emarginate. Lateral margins arcuate, narrowing forward and less so from widest point to base. Posterior margin slightly protruding. Anterior angles subrectangular, posterior angles obtuse. Meso- and metanotum ( Fig. 4–7 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 ) glabrous, distinctly narrower than pronotum, wider than abdominal tergite I. Mesonotum distinctly elevated at centre. Metanotum slightly elevated. Elytral and hind wing sheaths ( Fig. 4 View FIGURE 4 –8, 4–9) glabrous, with shallow transverse wrinkles; elytra distinctly punctatostriate, but with obscure punctures.

Legs. Legs similar in shape to that of adults ( Fig. 4 View FIGURE 4 –9). Femur thick, glabrous. Tibia gradually explanate toward apex, with short pubescence on ventral surface and apex; protibia explanate more particularly, outer edge with sharp denticulations distinctly; mesotibia with small denticles on outer edge; metatibia without denticles on outer edge. Tarsus slender, with dense short pubescence on ventral surface. Tarsal claws with two long pubescence at base of ventral surface.

Abdomen. Abdomen 9-segmented, dorsomeson distinct. Abdominal terga broad, convex, glabrous. Most segments with well developed rakelike lateral processes, and each conical projection on lateral processes bearing a short erect apical seta ( Fig. 5 View FIGURE 5 –11). Lateral processes with darker sclerotized edges, opposing single projection on lateral processes of adjacent abdominal segments forming the anterior and posterior curved teeth of gin trap structures. Gin trap between segments IV and V as in Fig. 5 View FIGURE 5 –10. Tergites I–VII ( Fig. 5 View FIGURE 5 –10) with similar form, length of tergites I–VI shorter than VII, lateral processes well developed. Tergite VIII very short, about 1/3 as long as VII; lateral processes less developed, only two spines with apical setae; posterior margin of tergite VIII with sparse tubercles bearing long erect. Tergite IX nearly semicircular, depressed at centre and bearing a pair of slender subtapered divergent urogomphi; lateral margins and ventral surface with sparse tubercles bearing long erect apical setae. Urogomphi ( Fig. 5 View FIGURE 5 –12) with several annular wrinkles, finely reflexed, directed posteriorly, gradually feebly narrowing towards apex. Abdominal sternites I–VIII smooth, posterior margin with sparse tubercles bearing long erect apical setae. Abdominal spiracles ovate, visible on anterolateral margins of abdominal ventrites I–VII. Spiracles on segment I enlarged and hidden beneath wing sheaths.

Comment. The antenna, palpi of mouthparts and legs of the material studied are surrounded by a semilucent thin shell, but the structures are clearly visible.

The urogomphi apices are spined in other described Uloma species. However, all three examined specimens of the present species showed the urogomphi with truncate apices ( Fig. 5 View FIGURE 5 –12), which probably broke off. This character would be sure after more samples were obtained.

Adult. Male ( Fig. 6 View FIGURE 6 –13). Body length: 12.0–14.0 mm; elytral width at widest point: 4.5–5.0 mm. Body elongate elliptical, slightly arched dorsally, dark brownish to black. Antennae, mouthparts and legs slightly paler.

Head. Nearly hexagonal, with dense large punctures. Labrum trapezoidal, densely and finely punctate, scattered with long yellow hairs. Clypeus densely and largely punctate, anterior margin weakly emarginate, elevated with two small ridges. Frontoclypeal suture slightly impressed. Genae slightly convex and extended, temples reduced. Eyes transverse, with at least 2–3 facets at narrowest point in lateral view; distance between eyes approximately 2.5 times longer than their diameter. Frons slightly convex, with dense large punctures. Mentum ( Fig. 7 View FIGURE 7 –17) cordate, truncate basally, emarginate on anterior margin, slightly flat in middle, with a basal interrupted cordiform hairy patches on external sides. Ligula ( Fig. 7 View FIGURE 7 –17) deeply emarginate anteriorly, depressed in middle with sparse long hairs. Terminal maxillary palpomere slightly knife-shaped.Antennae ( Fig. 7 View FIGURE 7 –15) short, reaching to basal 2/3 of pronotum; antennomere I thick, II and IV short, III slender, V–X gradually widening, forming a more or less distinct club, XI semi-spherical; V, VII obviously sharply protruding at inner border; ratio of the length of antennomeres II–XI as follows: 7.0: 12.0: 8.0: 8.0: 9.0: 8.0: 9.0: 8.0: 8.0: 13.0.

Thorax. Pronotum ( Fig. 7 View FIGURE 7 –19) subquadrate, nearly 1.2 times as wide as long, widest in middle, with sparse large punctures widely spaced at centre and becoming denser and smaller toward sides. Pronotum with a large and deep anterior impression and a shallow groove in middle of posterior margin. Anterior margin slightly emarginate with narrow border only at both apices, without border in middle 1/3, and with dense short hair fringes. Lateral margins slightly arcuate, strongly narrowing forward and less so from widest point to base, with broad border. Basal margin slightly protruding. Anterior angles slightly sharp, posterior angles obtuse. Prosternum with dense and large punctures, posternal process ( Fig. 7 View FIGURE 7 –21) rounded in lateral view, smoothly descended at apex, with two rows of short yellow hairs on centre. Propleuron with long wrinkles and dense large punctures. Scutellar shield subtriangular, with sparse and small punctures. Elytra nearly parallel-sided; elytra distinctly punctato-striate, punctures of elytral rows large and somewhat broader than stripes; intervals flat, finely and sparsely punctate with several transverse wrinkles, lateral margins visible only at humeri in dorsal view.

Legs. Protibia ( Fig. 7 View FIGURE 7 –23) with two equal apical spurs; slightly emarginate, narrow at base, then feebly and gradually explanate on both inner and outer edges; inner edge weakly emarginate at base, distinctly protruding to inner apex; outer edge with 8–9 sharp denticulations at apical 3/4; dorsal surface with a long depression near apex and large sparse and not confluent punctures; ventral surface with a row of small sharp protuberances. Mesotibia feebly and gradually expanding toward apex, outer edge with small denticles and short hairs. Metatibia feebly and gradually expanding toward apex, outer edge smooth without denticles and hairs. Length ratios of metatarsomeres ( Fig. 7 View FIGURE 7 –25) I to IV as follows: 41.0: 9.0: 9.0: 31.0.

Abdomen. Ventrites finely and densely punctate, punctuation larger and sparser towards lateral portions, and with sparse long wrinkles; last ventrite with a very shallow impression. Aedeagus ( Fig. 7 View FIGURE 7 –26, 27) with basale parallel-sided; apicale broad at base, then gradually feebly narrowing and nearly parallel-sided towards apex, transversely depressed near basal, truncate and semicircularly depressed at apex in dorsal view. Aedeagus with a deep longitudinal depression at centre in ventral view, and slightly curved in lateral view.

Female ( Fig. 6 View FIGURE 6 –14). Mentum ( Fig. 7 View FIGURE 7 –18) without hair.Antennomeres not protruding to inner border ( Fig. 7 View FIGURE 7 –16). Pronotum ( Fig. 7 View FIGURE 7 –20) with a shallow anterior impression. Posternal process ( Fig. 7 View FIGURE 7 –22) without hair at centre. Protibia ( Fig. 7 View FIGURE 7 –24) with shape similar to that of male, inner edge not protruding to inner apex. Last ventrite without impression.

Diagnosis. The male adult of U. (U.) metogana is similar to U. (U.) takagii Masumoto et Nishikawa, 1986 from Taiwan, but can be distinguished by characteristics of the shapes of the pronotum, the anterior angles and the scutellum, and presence or absence of short yellow hairs on central prosternum in males. The male adult of U. (U.) metogana is also similar to U. (U.) rubripes rubripes ( Hope, 1831) , which is mainly distributed in Southeast Asia ( Vietnam, Bhutan, Nepal, Phillipines, Thailand, Indonesia, India, China, etc.) and New Guinea, but both can be distinguished by the different shapes of the ridges of clypeus, the pronotum and the long depression near apex on dorsal surface of protibia.