Metoisops michalskii Kim, Taszakowski, and Herczek, 2023
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publication ID |
https://doi.org/ 10.4202/app.00991.2022 |
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DOI |
https://doi.org/10.5281/zenodo.10988604 |
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persistent identifier |
https://treatment.plazi.org/id/AD773D19-FFDF-FF95-FCEA-E00545A9A3BD |
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treatment provided by |
Felipe |
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scientific name |
Metoisops michalskii Kim, Taszakowski, and Herczek |
| status |
sp. nov. |
Metoisops michalskii Kim, Taszakowski, and Herczek sp. nov.
Figs. 1A View Fig , 2 View Fig .
Zoobank LCID: urn:lsid:zoobank.org:act:D378FF45-A830-4D05-B346-6FAAC446208A
Etymology: Named after Artur Michalski, a collector of the new fossil; a noun in the genitive case.
Holotype: DZUS HE44-451 - 1-001 , male in 23×14 × 4 mm in piece of Baltic amber, with the curatorial museum code.
Type locality: Vistula Spit, Gdańsk Bay, Poland.
Type horizon: Baltic amber, mid-Eocene (ca. 44.1±1.1 Ma according to Wappler 2005).
Material.— Holotype only.
Diagnosis.—Differs from other congeners by the following combination of characters: body relatively small, deeply punctate, covered with densely golden pubescence ( Fig. 2A View Fig 1 View Fig ); head extremely transverse, wider than 3× longitudinal length; vertex distinctly narrow; compound eye wide, single compound eye as wide as 3× vertex; second antennal segment thick, slightly clavate; third segment shorter than fourth segment; fourth segment subdivided ( Fig. 2A View Fig 3 View Fig ); second labial segment shortest; third labial segment longest; posterior pronotal width shorter than 2 times longitudinal length; embolium impunctate; basal and apical parts of femur dark brown.
Description.—Male body elongate-oval, length 2.69 mm. Coloration mostly dark brown, partly pale brown. Head mostly dark brown; vertex and frons dark; clypeus and juga dark brown; antennae mostly dark brown; apical part of first segment, second segment and apical part of first subdivision of fourth segment somewhat paler; labium mostly pale brown, apex of fourth labial segment dark brown. Thorax pronotum entirely dark brown; scutellum pale brown; hemelytron mostly dark brown; embolial margin paler; membrane grayish, subhyaline; legs pale brown with dark bands; basal and apical parts of femur dark brown. Abdomen entirely dark brown.
Body generally glossy, mostly punctate, densely covered with golden pubescence; frons and clypeus impunctate, covered with relatively short pubescence; antennae with short and dense erect setae; pronotum with large and dense punctures except for calli region, densely covered with golden pubescence; scutellum with small punctures and with somewhat short pubescence; mesoscutum impunctate; hemelytra with large punctures, covered with dense golden pubescence; embolial area impunctate; cuneus impunctate.
Head hypognathous, elongate in lateral view, anterior margin almost straight in dorsal view, less than pronotum height in lateral view; vertex narrow, approximately 3 times as wide as single compound eye; compound eye slightly prominent in frontal view; ocelli large, almost touching compound eye, not close to each other; fovea antennalis positioned below compound eyes; antennae shorter than the body, four segmented including subdivided fourth segment, cylindrical; first segment slightly longer than the third segment; second segment longest and thickest, longer than the third and fourth segments combined; third segment shorter than fourth segment; proportion of first to fourth antennal segments 0.20: 0.81: 0.26: 0.39 (first subsegment: 0.20; second subsegment 0.19); frontal-clypeal part rather elongate; labium somewhat thick, exceeding hind coxae, reaching third abdominal segment. Thorax pronotum trapezoid, midline length longer than anterior width and 1/2 posterior width respectively, posterior margin weakly convex in middle, lateral margin straight, posterior angle slightly carinate; pronotal collar thin; calli region weakly swollen; scutellum large, midline as same as pronotal midline length, width more than anterior pronotal width; mesoscutum narrowly developed; lateral margin of hemelytra rounded; commissure as long as scutellum length; cuneus broad, inner margin straight, cuneal fracture weakly developed; membrane with two cells (large and very small); legs moderately long; hindfemur not reaching the apex of abdomen; tarsus two segmented ( Fig. 2A View Fig 5). Abdomen elongate, exceeding apex of cuneus. Genital capsule with a pair of relatively large parameres, left paramere subequal to right paramere in length; left paramere scythe-shaped, hypophysis broad; right paramere elongate and curved, hypophysis tapered to apex ( Fig. 2A View Fig 6).
Measurements (in mm).—Body length 2.69; head length 0.18; head width including compound eyes 0.54; vertex width 0.08; first antennal segment 0.20; second antennal segment 0.81; third antennal segment 0.26; fourth antennal segment 0.39 (subsegments; first 0.20; second 0.19); first labial segment 0.27; second labial segment 0.32; third labial segment 0.29; fourth labial segment 0.34; pronotal midline length 0.48; basal pronotal maximal width (straight) 0.90; anterior scutellar width 0.52; scutellar midline length 0.37; commissure length 0.46; outer embolial margin length (straight) 1.24; maximal width across hemelytron 0.42; hindleg (femur: tibia: tarsus) 0.92: 1.20: 0.33.
Remarks.—The subequal parameres in length and the structure of apices of parameres (broad hypophysis in left paramere and tapered hypophysis in right paramere) are similar to those found in Gigantometopini . The paramere morphology of fossil in Isometopinae is the first finding.
Stratigraphic and geographic range. — Type horizon and locality only.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.