Macratria tambopata, Telnov, 2024

Macratria tambopata sp. nov. ( Figs 7–8 View Figure 7 View Figure 8 )

urn:lsid:zoobank.org:act:1208CCDB-0572-4376-9096-D88AB9A77CE2

Type material designated. Holotype ♂, BMNH: PERU Madre de Dios Rio Tambopata Res. 30 km (air) SW Pto. Maldonato, 290m 12°50’S 069°20’W [printed] // N.E.Stork [printed] 21.ii.1982 [handwritten] B.M. 1982– 183 [printed] // NHMUK 013663789 About NHMUK [printed, supplemented with a QR code]. GoogleMaps

Derivatio nominis. Toponymic. Named after the Tambopata River and its national reserve. Noun in apposition.

Measurements, holotype male, total body length 6.6 mm; head length 1.1 mm, head width across compound eyes ~ 1 mm, pronotal length 1.6 mm, maximum pronotal width 1 mm, elytral length 3.9 mm, combined maximum elytral width 1.5 mm.

Description. Holotype male ( Figs 7–8 View Figure 7 View Figure 8 ). Dorsum brown, head rufous-brown. Mouthparts, labrum, antenna, femora and foretibia yellow. Remaining tibiae and tarsi rufous-brown. Ventral pterothorax rufous-brown, abdomen yellowish-brown. Head broadly elliptical, subopaque to opaque dorsally and ventrally. Frons moderately wide, about 0.7× as wide as dorsal

190 eye length. Compound eye large, hemispheric, strongly protruding from lateral outline of head, about twice as long as converging tempus. Interfacetal setae long, dense. Frontoclypeal suture or impression not observed. Head base narrow, subtruncate. Occiput and vertex with median longitudinal sulcus. Head dorsal punctures circular, dense (much denser on anterior half of head, sparse in area of median sulcus), rather flat. Intervening spaces smooth, generally narrower than punctures except both sides of median sulcus where intervening spaces about as wide as punctures. Head dorsal setae tan, thickened (somewhat scale-like), dense, fully concealing dorsal surface of head except around median sulcus. Tactile setae sparse, erect, extraordinary long, present dorsally and (sparser) ventrally. Antenna rather short, filiform, not or hardly widened in distal half, hardly exceeds beyond base of pronotum when directed posteriorly. Basal antennomere thickened, about twice as long as antennomere two. Antennomere three about 1.6× as long as antennomere two, barely longer than antennomere four. Antennomeres 3–8 elongate, 9–11 elongate and thickened of them 9–10 widened distally, about equally long. Penultimate antennomere distinctly longer than wide. Terminal antennomere elongate fusiform, apically angulate, about 1.3× as long as penultimate antennomere, much shorter than combined length of antennomeres 9–10. Terminal maxillary palpomere cultriform. Pronotum subopaque dorsally, slightly glossy, flattened in dorsal aspect, elongate elliptical, as wide as head across compound eyes. Anterior margin truncate medially. Lateral margins distinctly constricted in anterior portion of pronotum and slightly so prebasally. Dorsal pronotal punctures larger than those on head, irregularly shaped, very dense and shallow. Intervening spaces smooth, much narrower than punctures. Pronotal dorsal setation brownish yellowish, rather long and dense, appressed, effectively but not completely concealing dorsal sculpture of pronotum. Basal fovea of pronotum wide, without dense setae. Tactile setae sparse, erect

Three new species of Macratria Newman, 1838 ( Coleoptera : Anthicidae ) from Ecuador and Peru to suberect, extraordinary long compared to the length of ordinary setae. Scutellar shield small, trapezoidal, truncate at posterior margin, punctate, subopaque, densely setose. Elytron strongly elongate and slender, slightly glossy, slightly and gradually constricted from humeral to apical area. Humerus broadly rounded. Postbasal transverse impression not indicated. Punctures on each elytron of two types: larger and coars- er punctures in basal half arranged into six (in dorsal view) poorly defined, in part confused longitudinal striae; much smaller punctures around and all-over posterior half of elytron are confused and flat. Intervening spaces smooth to subrugose (on basal third), variably wide. Elytral setation brownish yellowish, rather long and dense, appressed, arranged into five longitudinal stripes of setae, directed posteriorly or obliquely laterally. Tactile setae sparse, erect, very long. Lateral humeral stria not shifted dorsad, not visible in dorsal view. Sutural stria complete, narrow. Metathoracic wing fully developed. Procoxa with dense appressed whitish setae, mesocoxa and metaventrite with dense appressed golden (medially) to whitish (laterally) setae. Legs long and stout. Femur clavate. Tibia distinctly widened distally, densely setose, metathoracic tibiae slightly arched at outer margin. Tibial terminal spurs paired, margins serrate. Basal prothoracic tarsomere moderately widened. Basal metathoracic tarsomere about 1.7× as long as combined length of remaining metathoracic tarsomeres. Pretarsal claws not dentate. Male tergite VII strongly and deeply notched medially at posterior margin, dorsally with shallow medial longitudinal furrow, with few long submedian and numerous shorter setae ( Fig. 8A View Figure 8 ). Male sternite VII short and broad, medially emarginate at posterior margin ( Fig. 8B View Figure 8 ). Male tergite VIII enlarged, later lobes broad and apically rounded, medially deeply cleft to base ( Fig. 8C View Figure 8 ), sternite VIII and IX as in fig. 8D. Aedeagus ( Fig. 8E–G View Figure 8 ) strongly elongate, parameres apically acutely angulate, penis apically narrow, apex hook-like, curved and preapically angulate in lateral view ( Fig. 8G View Figure 8 ).

Sexual dimorphism. Female is unknown.

Differential diagnosis. Macratriatambopata sp. nov. has no similar congeners in South America, and is peculiar in the strongly elongate body, the head shape with a longitudinally sulcate vertex, the elytra with longitudinal bands of setae, the presence of the extraordinarily long tactile setae on the dorsum, and the shape of the male terminalia (in particular the medially furrowed tergite VII) and genitalia (in particular, the apically hooked and preapically angulate tegmen).

Ecology. Collected from vegetation in mid-montane rainforests at 2000–2100 m a.s.l.

Distribution. Peru: Tambopata National Reserve.

191

Dmitry Telnov