Megalinus hailuogouensis Bordoni, 2013
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publication ID |
https://doi.org/ 10.11646/zootaxa.3727.1.1 |
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publication LSID |
lsid:zoobank.org:pub:EBFEDD52-94FA-4AC9-93BB-BE6101BB1B31 |
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persistent identifier |
https://treatment.plazi.org/id/03F587A5-5B6F-A930-3B88-33B7FCF1FE0B |
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treatment provided by |
Felipe |
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scientific name |
Megalinus hailuogouensis Bordoni |
| status |
sp. nov. |
Megalinus hailuogouensis Bordoni View in CoL , sp. nov.
( Fig. 2A View FIGURE 2 ; Fig. 2 View FIGURE 2 -1A–E)
Type material. Holotype: male, CHINA: Sichuan: Luding Co.: Hailuogou (29.35N, 102.00E), 2200–2300 m, 27.VII. 2006, Hu & Tang collected (CT).
Description
Measurements. BL= 7.1 mm, FL= 4.4 mm, HL= 1.3 mm, HW= 1.1 mm, PL= 1.4 mm, PW= 0.97 mm, EL= 1.5 mm, EW= 1.4 mm.
Body cylindrical, medium sized. Body entirely dark brown, except maxillary and labial palpi brown.
Head ( Fig. 2A View FIGURE 2 ). Subquadrated (HL to HW ratio 1.1), temple slightly widened posteriorly, posterior angles rounded. Dorsal integument shiny, without microsculpture and micropunctures, but distributed with round, medium-sized punctures, interspaces between punctures 2–3 punctures’ diameter, also with smaller, elliptical, densely-distributed punctures on surface between anteocular furrows; medial longitudinal band, ca. 0.20 mm width, impunctate. Each side of cranium also with frontal puncture on epistoma, anterolateral puncture near antennal insertion, midlateral puncture approximately a distance of 5–6 punctures’ diameter from dorsal margin of eye, temporal puncture near lateral margin, and occipital puncture near posterior margin; deflexed portion of head bearing 2–3 rows of smaller punctures. Frontal furrows convergent and distinct at anterior half, indistinct at posterior half; anteocular furrows longer, arriving line connecting posterior 1/3 of each eye. Eye large, ca. 1/2 of temporal length (eye: temple = 0.37: 0.74 mm), distinctly protruding laterad. Epistoma protruding forwards, of subrectangular shape, anterior margin subtruncated. Distance between antennal insertions 0.33 mm, longer than that from antenna to eye (0.23 mm).
Antennae. Scape stout, thickened apically, longer than three subsequent antennomeres combined, 0.62 mm;
Neck. Medium width (0.43 mm), slightly wider than 1/3 of head width.
Pronotum ( Fig. 2A View FIGURE 2 ). Subrectangular, distinctly elongated (PL to PW ratio 1.4), longer than head, but narrower. Obviously widened anteriad, lateral margins sinuate, anterior angles well-developed and slightly protruding, posterior angles broadly rounded. Integument shiny, without microsculpture and micropunctures. Two rows of setiferous punctures presenting on each side, admedian row consisting of 9–11 punctures; lateral row, curvedly arranged, of 9–11 punctures; other irregular punctures scattered near anterior margin.
Mesoscutellum. Shiny, extensively covered with polygonal reticulum, and with paired punctures on anterior 1/3.
Elytra ( Fig. 2A View FIGURE 2 ). Subquadrated (EL to EW ratio 1.1), obviously wider than pronotum, but longer. Humeri well developed, lateral margins widened posteriorly, hind margin subtruncated. Integument shiny and flattened, without microsculpture; each elytron with 8–9 rows of medium-sized punctures; deflexed portion with 7–8 rows of punctures.
Abdomen. Cylindrical, broadest at segment VI. Tergites III–VII shiny, covered with superficial transverse microstriae and small setiferous punctures, interspaces between punctures near 2–3 punctures’ diameter, denser laterobasally; each tergite with basal impression, which impunctate, but bearing distinct polygonal reticulum. Surface between two basal transverse carinae impunctate, but bearing distinct transverse microstriae. All abdominal sternites shiny, with microsculpture and setiferous punctures as those on tergites.
Male. Abdominal segment VIII entirely covered with setiferous punctures, except a narrow medial longitudinal impunctate band; posterior margins of tergite VIII slightly emarginated or subtruncated ( Fig. 2 View FIGURE 2 -1A), that of sternite VIII slightly protruding backwards ( Fig. 2 View FIGURE 2 -1B). Tergite IX symmetrical, connected mediobasally. Sternite IX asymmetrical, with gradually-sharpened base and broadly arcuate posterior margin ( Fig. 2 View FIGURE 2 -1C). Tergite X symmetrical and narrow, with slightly rounded base and subtruncated posterior margin, in situ broadly exposed between tergite IX ( Fig. 2 View FIGURE 2 -1D). Median lobe of aedeagus elliptical, large sized ( Fig. 2 View FIGURE 2 -1E), basal piece without transparent, membranous medial-longitudinal band, anterior portion subcylindrical, 0.23 mm; basal bulb 0.82 mm long. Parameres symmetrical, elongate, slightly longer than 1/3 of basal bulb. Internal sac with two rows of spines, left one more transverse and larger; basal part crossed and with dense small spines.
Female. Unknown.
Remarks. This species could be distinguished from its congeners by: 1) head subquadrated; 2) small, ellitpical, densely-distributed punctures between anteocular furrows; 3) posterior half of frontal furrows indistinct; 4) admedian row of pronotum consisting of 11–13 punctures and lateral row, curvedly arranged, of 12–13 punctures; 4) tergites III–VII covered with superficial transverse microstriae; 5) posterior margins of tergite VIII slightly emarginated or subtruncated; 6) tergite X symmetrical and narrow, with rounded base and broadly arcuate posterior margin; 7) median lobe of aedeagus rather oblong; 8) basal piece with transparent, membranous mediallongitudinal band; 9) internal sac S-shaped and densely spinulate.
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.