Electroderaeous crassicornis, Taszakowski & Kim & Bonino & Tettamanzi & Jung, 2023

Taszakowski, Artur, Kim, Junggon, Bonino, Enrico, Tettamanzi, Lorenzo & Jung, Sunghoon, 2023, Electroderaeous crassicornis, a new genus and species of Deraeocorinae (Hemiptera: Heteroptera: Miridae) in Miocene Dominican amber, Zootaxa 5284 (3), pp. 593-600 : 597-598

Electroderaeous crassicornis sp. nov. Taszakowski & Kim

( Fig. 1 )

Diagnosis. See generic diagnosis.

Description. Male: Body elongate, relatively small, 2.9 mm. Coloration. Ground color brown with dark punctures. Head: mostly brown; compound eyes relatively paler; antennae mostly brown with pale parts; pedicel with pale ring in the middle of the length. Thorax: pronotum generally mottled brown, dark around calli; scutellum mostly dark brown, with pale apices; hemelytra mostly pale brown with unevenly distributed darker spots; corium mostly pale, dark in posterior part; clavus mostly pale, dark in apical part; cuneus pale with dark markings, apical part dark brown; membrane greyish with dark veins; legs mostly yellowish pale brown with dark annulations; femur pale with two dark annulations subapically; tibia mostly pale brown, dark annulations sub-basally. Abdomen: mostly brown to dark brown, pygophore dark brown. Surface and Vestiture. The body generally glossy, densely covered with long setae; head including antennae densely covered with short pubescence; pronotum disc with rugged and strong punctuations, entirely covered with setae, callosite including calli impunctate; scutellum impunctate, covered with relatively short setae; hemelytra strongly punctate, densely covered with setae; legs covered with short dense pubescence; tibia with a setae-like pale spine. Structure. Head: hypognathous; vertex concave, narrow, subequal to first antennomere diameter, with weak longitudinal sulcus; posterior margin of the head concave, compound eye very large, much wider than vertex width, and callus, with inter-ommatidial hair-like setae; ommatidia very large; clypeus large, visible in dorsal view; antennae inserted in the mid height of the eyes, thick, shorter than body length; each antennomere spindle-shaped; first antennomere thickest; second antennomere longest, shorter than 2x third antennomere; proportion of first to fourth antennomere 0.3: 0.8: 0.55: 0.5; bucculae short and strongly arcuate; labium exceeding slightly mid-coxae, first labial segment reaches beyond the bucculae, reaching the proxyphus. Thorax: pronotum subtrapezoidal, midline longer than scutellum midline, posterior margin convex, rounded, pronotal collar flattened, calli strongly swollen, posterior margin of the callosite region demarcating by transverse depression; scutellum small, midline less than commissure length, slightly swollen; lateral margin of hemelytra straight; clavus large, claval commissure is long, tip of the claval commissure almost reaches the inner apex of the endocorium; cuneus broad; the wings somewhat deflexed at the costal fracture; the veins on membrane thickened, major cell not exceed beyond the cuneal tip, minor cell strongly reduced; legs somewhat slender; combined length of hind femur and hind tibia subequal to body length; first tarsomere subequal to second tarsomere in length, combined length of second and third tarsomeres less than third tarsomere. Abdomen: elongate, exceeding apex of cuneus. Genitalia: pygophore conical and weakly asymmetrical, genital opening dorsally oriented; apophysis of the left paramere running along the posterior rim of the genital opening.

Measurements (in mm): body length: 2.9; body width: 1.1; head length 0.35; head width including compound eyes: 0.8; antennomere I length: 0.3; antennomere II length: 0.8; antennomere III length: 0.55; antennomere IV length: 0.5; labial length: 1.1; pronotal midline length: 0.65; scutellar midline length: 0.4; claval commissure length: 0.6; outer embolial margin length (straight): 1.3; outer cuneal margin length (straight): 0.45; hindleg length (tibia: tarsus): 1.2: 0.3; length of tarsal segment I: 0.1; II: 0.1; III: 0.2.

Type material. Holotype. Male. Dominican amber, Miocene , Burdigalian , La Cumbre area , Cordillera Septentrional , piece of amber with dimensions 85 × 54 × 36 mm. The examined specimen will be deposited in the collection of the Civic Museum of Fossils of Besano (Besano, VA, Italy); acquisition number MCFB 865 .

Syninclusions. A rich fauna is present inside the piece of amber; we recognize: Diptera : Cecidomyiidae —gall midge, 3 exx.; Diptera : Psychodidae —moth fly, 1 ex.; Diptera : Chironomidae , 1 ex.; Hymenoptera : Bethylidae (Platygastroidea) —parasitoid aculeate wasp, 1 ex.; Hymenoptera : Formicidae : Myrmicinae—ant, 1 ex. (winged); Coleoptera : Staphylinidae —rove beetle, 1 ex.; Lepidoptera, caterpillar and its case, 1 ex.; Hemiptera: Fulgoromorpha : Fulgoroidea: Nogodinidae : Yobuenahuaboshka rectangialatus Szwedo et Stroiński, 2022, 1 ex.; Hemiptera: Fulgoromorpha : Fulgoroidea—planthopper nymph covered by fungus, 1 ex., Orthoptera—covered by fungus, 1 ex., Hemiptera: Cicadomorpha : Membracoidea: Cicadellidae : Aphrodinae : Xestocephalini —leafhoppers Xestocephalus sp. , 2 exx.; Blattodea—cockroach, 1 ex., leaf fragment, and several dozens of other not recognized yet syninclusions.

Type locality. Cordillera Septentrional , La Cumbre area, Hispaniola, Dominican Republic .

Stratigraphic occurrence. Late Lower Miocene, Burdigalian; Yanigua Formation (ca. 16–17 Ma; Iturralde-Vinent & MacPhee 2019).

Etymology. Named after a combination of Latin ‘ crassus ’—thick and ‘ cornus ’—horn, referring to the robust antennae.

Figures

FIGURE 1. Electroderaeous crassicornis gen. et sp. nov. A: dorsal view; B: ventral view; C: head and pronotum; D: antennae; E: hind tibia and tarsus; F: hind tarsus. Scale bar: A, B: 1 mm; C: 0.4 mm; D, E: 0.3 mm; F: 0.1 mm.