Macratria florsavichi, Telnov, 2023

Telnov, Dmitry, 2023, New species and records of Macratriinae LeConte, 1862 (Coleoptera: Anthicidae) from the Americas with five new descriptions, Zootaxa 5389 (2), pp. 173-192 : 181-184

Macratria florsavichi sp. nov. ( Figures 6–7 )

https://zoobank.org/ B8003CE4-30EE-44C5-BE54-B34365BCFAC1

Type material designated. Holotype ♂, BMNH: PANAMA Bocas del Toro prov. Chiriqui Grande 19.ix.2007 08°56’32’’N, 082°09’20’’W, 30m, vegetation along road beating & sweeping L. SEKERKA & D. WINDSOR lgt. [printed, label green, black frame] // BMNH{E} 2010-28 Lukáš Sekerka [printed]. The antennomeres 5–11, the left mesothoracic tarsomeres 3–5 and the left metathoracic tarsus are missing.

Derivatio nominis. Patronymic. Named for Florian Savich (also Floriāns Savičs, Rīga, Latvia), my friend, a well-known Latvian coleopterist, to commemorate his 50 th anniversary in 2023.

Measurements, holotype male, total body length 4 mm; head length 0.7 mm, head width across compound eyes 0.6 mm, pronotal length 0.9 mm, maximum pronotal width 0.6 mm, elytral length 2.4 mm, combined maximum elytral width 1 mm.

Description. Male ( Fig. 6 ). Dorsum and venter nearly uniformly black, mouthparts, clypeus and anterior frons striking pale yellow and terminal abdominal ventrite brown. Four basal antennomeres yellow to yellowish brown. Maxillary palpi yellowish brown, terminal palpomere darker. Femora shortly black at base and at distal third, yellow medially. Tibiae black basally, yellow at main extent. Basal prothoracic tarsomere, two basal meso- and metathoracic tarsomeres brown, remaining tarsomeres yellow. Head moderately glossy dorsally and ventrally, elliptical. Frons wide, about 0.7× as wide as dorsal eye length. Compound eye large, strongly protruding from lateral outline of head, about 2.1–2.2× as long as constricted tempus. Interfacetal setae long, dense. Head base subtruncate, not notched. Frontoclypeal suture or impression not observed. Head dorsal punctures dense, moderately deep. Intervening spaces smooth, narrower than punctures. Head dorsal setae yellowish, subdecumbent, moderately dense, not concealing dorsal surface of head. Tactile setae sparse, erect, long. Antenna slender and strongly filiform, slightly thickened at apex, extending towards base of pronotum when directed posteriorly. Basal antennomere elongate, about 1.2× as long as antennomere two. Antennomere three about as long as each antennomere two to six, 0.9× as long as antennomere seven. Antennomeres 3–7 elongate, 9–10 enlarged and widened. Terminal antennomere elongate fusiform, acutely pointed, about 1.5× as long as penultimate antennomere, shorter than combined length of antennomeres 9–10. Terminal maxillary palpomere shortly cultriform. Pronotum subopaque dorsally, flattened in dorsal aspect, elongate, as wide as head across compound eyes. Anterior margin truncate. Lateral margins slightly constricted anteriorly and posteriorly, broadly rounded medially. Dorsal pronotal punctures much larger and denser than those on head, deep. Intervening spaces strongly narrower than punctures. Pronotal dorsal setation yellowish, moderately dense, subdecumbent, not concealing dorsal sculpture of pronotum. Basal area of pronotum without zone of dense setae. Tactile setae sparse, erect to suberect, not or slightly longer than ordinary setae. Scutellar shield small, truncate at posterior margin, sparsely punctate, glossy. Elytron elongate, opaque, slightly narrows posteriorly. Humerus broadly rounded. Postbasal transverse impression not indicated. Punctures on basal half of elytron arranged into six poorly defined, flat rows. Intervening spaces between rows minutely punctate to microstrigose. Elytral setation dirty yellowish, decumbent, moderately long and dense, directed posteriorly and, in part, slightly obliquely laterally, not concealing dorsal sculpture of elytron. Tactile setae sparse, erect. Lateral humeral stria not shifted dorsad, not visible in dorsal view. Sutural stria complete, moderately broad. Metathoracic wing fully developed. Legs long and stout. Femur clavate. Tibia distinctly widened distally, densely setose on distal half, metathoracic tibia slightly sinuous. Tibial terminal spurs paired, margins serrate; spurs of metathoracic tibia longer than those of pro- and mesothoracic tibia. Tarsomeres of all legs elongate. Basal prothoracic tarsomere strongly widened. Basal metathoracic tarsomere about 1.3–1.4× as long as combined length of remaining metathoracic tarsomeres.All pretarsal claws strongly dentate at base. Male tergite VII broadly emarginate at posterior margin ( Fig. 7A ). Male morphological sternite VII rather short and broad, slightly sinuous at posterior margin, with a long seta each side at transition of posterior to lateral margin ( Fig. 7B ). Male tergite VIII broadly U-like emarginate at posterior margin, with long, narrow lateral arms; morphological sternite VIII apically deeply emarginate with narrow lateral lobes; sternite IX V-shaped ( Fig. 7C ). Aedeagus ( Fig. 7D–E ) long and rather slender, basale twice as long as apicale. Paramere apically asymmetrically curved inwardly. Median lobe apically tripartite.

Sexual dimorphism. Female is unknown.

Differential diagnosis. Macratria florsavichi sp. nov. is specifically different from all American congeners in the shape of the male terminalia and genitalia in the combination with the nearly entirely black body, bicoloured legs and not notched head base. Body colouration is similar to that of M. bugle and M. guaymi spp. nov. (both from Panama; described in the present paper), but the genitalia, in particular, the shape of the parameres, are different. Somewhat similar to M. rufifrons Champion, 1890 (Central America, Ecuador) but differs in strikingly bicoloured legs (legs brown in M. rufifrons ), the comparatively slenderer head and stronger punctured pronotal disc, the longer penultimate antennomere and the shape of the male terminalia and aedeagus.

Ecology. Virtually unknown. Collected from roadside vegetation.

Distribution. Panama: Chiriqui Province.

Figures

FIGURE 6. Macratria florsavichi sp. nov. A—Holotype ♂, habitus, dorsal view; B—Ditto, forebody, dorsal view [not to scale].

FIGURE 7. Macratria florsavichi sp. nov., holotype ♂. A—Tergite VII, dorsal view; B—Morphological sternite VII, ventral view; C—Tergite VIII and morphological sternites VIII and IX, ventral view; D—Aedeagus; E—Aedeagus, apicale, enlarged [not to scale].