Mannophorus tricostatus Eya, 2024

Mannophorus tricostatus Eya , new species

( Fig. 222–234 View Figures 222–234 )

Description. Male: Length 13 mm. Form small, elongate; integument nitid, metallic blue with greenish cast; each elytron with two glabrous, narrow, elevated, costae and another vague costa on apical half; punctation coarse, dense; pubescence long, erect on dorsum, long and depressed underneath. Head small; vertex alveolate punctate with vague impunctate, glabrous line in middle between eyes; front coarsely, subconfluently punctate; postclypeus finely, confluently punctate on sides, glabrate more sparsely punctate in middle; frontoclypeal sulcus, nitid, glabrous broadly excavate; mid-cranial sulcus narrow, deeply canaliculate; antennal tubercles with apices angulate; genae short, anterior margin of lower eye lobes separated from base of mandible, integument nitid, sparsely, irregular punctate, beneath coarsely, rugosely punctate; setae, long, flying on vertex around upper eye lobes, antennal tubercles, and dorsal anterior margins of genae; labrum finely punctate on sides, pubescence long, depressed; mandibles with sides arcuate, pubescence depressed; antennae slender, exceeding elytral apices by two antennomeres; scape conical densely, deeply, rugosely punctate, clothed with short, suberect setae; antennomeres II–VII coarsely, densely, rugosely punctate, pubescence short, depressed with few flying setae underneath, remaining antennomeres from VIII minutely, densely punctate, densely covered with minute, appressed, tawny pubescence with few longer, depressed setae on apices and few fly setae underneath; antennomeres vaguely carinate on outer surface of IV–VI and on inner surface of IV–VIII; antennomere III longer than I; IV shorter than III; V longer than IV, subequal to III; VI slightly shorter than V; VII longer than VI; VIII, IX slightly shorter than VII, subequal to V; X shorter than IX subequal to IV; XI longest, apical four-fifth vaguely appendiculate. Pronotum wider than long (L/W: 0.83), sides angulate with obtuse lateral tubercles slightly behind middle; disc convex, coarsely, densely, confluently punctate with long, erect, flying setae; apex narrowly constricted on sides, margin collared; basal margin vaguely lobed in middle, sides tapered to base of humerus; proepisternal area rugulose with large crater-like punctures interspersed with minute punctures, surface clothed with long, flying setae; prosternum with apical half transversely plicate, minutely punctate, basal half rugose, finely punctate on side and coarsely punctate in middle, surface thinly clothed with long, flying and depressed setae; mesosternum nitid, coarsely punctate on sides, integument in middle concave and sparsely punctate, pubescence long, appressed; mesepimera and mesepisterna finely punctate, pubescence short, appressed; metasternum with integument nitid, impunctate on either side of midline, sides discretely punctate with punctures finer and contiguous near base of mesocoxae, pubescence long, depressed, interspersed with suberect flying setae; metepisterna finely, densely punctate clothed densely with appressed pubescence. Scutellum coarsely, rugosely punctate. Elytra 2.6–2.7 times as long as broad; each elytron tricostate, subsutural and submarginal costae glabrous, narrow, elevated, and another vague costa in between; subsutural costa prominent, extending from base to beyond apical tenth, submarginal one shorter, starting well behind humerus extending to about apical fifth; vague costa in middle narrow, interrupted by punctures starting from basal third attaining apical tenth; punctures adjacent to suture, dense, deep, discrete, punctures between costae coarser, subcontiguous, those between submarginal costa and epipleura and near apices smaller, contiguous; pubescence on basal half, erect, near apices shorter, suberect; apices separately rounded, suture minutely dentate. Legs slender, nitid; femora slightly clavate, coarsely, densely punctate, dorsum sparsely clothed with depressed setae, inner surface clothed with long, pale, suberect setae; meso- and metafemora arcuate near base; metafemora falling far short of elytral apices; tibiae pitted with small contiguous punctures, clothed with short, depressed setae; protibiae with inner surface densely clothed with short, depressed, pale pubescence; metatarsomere I subequal to or slightly shorter than tarsomeres II and III combined. Abdomen nitid, sparsely punctate in middle, sparsely clothed with long, pale, suberect setae and short, depressed setae, sides finely, densely, contiguously punctate, densely clothed with long, appressed setae; apex of last sternite nar-

Female: Length 13 mm. Form more parallel-sided than male. Pronotum wider than long (L/W: 0.78) with proepisternal area rugose, coarsely, confluently punctate. Antennae shorter than body attaining middle of fourth abdominal sternite; antennomeres from apical half of IV–VII vaguely carinate on outer surface; antennomere III subequal to I; IV shorter than III; V longer than IV, slightly shorter than III; VI, VII subequal to V; VIII and IX shorter than VII, subequal to IV; X shorter than IX; XI subequal to VIII. Abdomen with apex of last sternite broadly truncate, and emarginate at middle.

Etymology. This species is named after the tricostate elytron.

Type materials. Holotype, male ( FSCA 00082451 View Materials ) and allotype, female ( FSCA 00082452 View Materials ), MEXICO: Chiapas: 48 km SE Jct. 190/199, 18 Oct. 1988, J.E. Wappes, both types deposited in FSCA.

Discussion. This species closely resembles the darker form (i.e., Mannophorus ferreus Bates ) of M. laetus LeConte but differs from the later by the elongate, narrower body form, broadly tuberculated sides of pronotum ( Fig. 229 View Figures 222–234 ), tricostate elytron ( Fig. 233 View Figures 222–234 ), and by the long flying erect setae on front, vertex, pronotum, prosternum ( Fig. 226–230 View Figures 222–234 ) and basal half of elytra ( Fig. 233 View Figures 222–234 ). Also, the inner surfaces of femora are covered by long suberect setae. The vertex and antennal tubercles are coarsely, alveolate punctate and the mid-cranial sulcus is deeply canaliculate. The collar-like projection on sides of the apical margin of the pronotum is not as prominent in this species compared to M. laetus . Mannophorus tricostatus new species is narrower than M. laetus with dimensions of the elytra 2.6–2.7 times as long as broad and elytra 3.9–4.0 times longer than length of pronotum, while M. laetus LeConte has elytra 2.4–2.5 times as long as broad, and elytra 3.3–3.6 times longer than pronotum. Mannophorus laetus also differs from this species by the rounded sides of pronotum, bicostate elytron, shorter erect setae on the dorsum and venter, and by the comparatively finer and denser punctures on the vertex, elytra, and femora. The integuments of M. tricostatus is brilliant metallic blue with greenish cast. The darker forms of M. laetus also have integuments with metallic bluish-greenish luster, however, the color is opaque compared to M. tricostatus .