Paralithomerus exquisitus, Chang, Huali, Zhang, Fan & Ren, Dong, 2008
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publication ID |
https://doi.org/ 10.5281/zenodo.182430 |
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DOI |
https://doi.org/10.5281/zenodo.6233243 |
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persistent identifier |
https://treatment.plazi.org/id/ED382379-3925-9C19-FF3D-F94CFA41AE93 |
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treatment provided by |
Plazi |
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scientific name |
Paralithomerus exquisitus |
| status |
sp. nov. |
Paralithomerus exquisitus sp. nov.
( Figs. 1–10 View FIGURES 1 – 4 View FIGURES 5 – 8 View FIGURES 9 – 10 )
Type specimen: Holotype. CNU-C-LB2006874-1, CNU-C-LB2006874-2 (part and counterpart of one specimen), almost complete impression of elaterid, housed in Key Lab of Insect Evolution & Environmental Changes, Capital Normal University, Beijing, China.
Locality and horizon. Collected from 2nd Bed of the Yixian Formation in Huangbanjigou, near Chaomidian Village, Shangyuan County, Beipiao City, Liaoning Province, China; Upper Jurassic-Lower Cretaceous.
Etymology. Specific name derived from Latin “ exquisitus ”, (meaning “exquisite”), for the striae of elytra are exquisitely preserved and elegantly lined.
Diagnosis. Head medium sized; maxillary palpi three segmented, last segment enlarged; eyes oval. Pronotum with width 1.07 times wider than long; prosternal process short. Elytra with 9 longitudinal striae, the 2nd and 3rd, 6th and 7th are united at the apical 1/4.
Description. Body subcylindrical, small sized, with length 8.5 mm, width 2.5 mm, elytron length 5.3mm; Maxillary palpi with terminal segment enlarged; Elytra with 9 distinctly longitudinal striae, the 3rd and 4th, 7th and 8th are united approximately at the apical 1/4 ( Figs. 1, 2 View FIGURES 1 – 4 ).
Head sub-triangular, convex; maxillary palpi three segmented, with terminal segment enlarged; mandibles incurved, bidentate at apex; labrum small, transverse; eyes oval, medium sized ( Fig. 3 View FIGURES 1 – 4 ).
Antennae filiform, incomplete with 8 preserved segments; scape robust, pedicel slightly shorter than scape and antennomere 3 together, antennomeres 4–8 progressively narrower ( Figs. 3 View FIGURES 1 – 4 , 9 View FIGURES 9 – 10 ).
Pronotum 1.92 times as long as head; with width 1.07 times wider than long; anterior margin arched inside, with short angles, lateral margins arcuate in front of hind angles, basal margin bisinuate, with basal pleural furrow; disc slightly convex; hind angles acute, with distinct short carina, produced laterally and posteriorly while embracing elytra bases ( Figs. 1, 4 View FIGURES 1 – 4 , 9 View FIGURES 9 – 10 ).
Elytra wider than prothorax, 3.62 times as long as wide; disc slightly convex, with 9 distinct longitudinal striae, the 3rd and 4th, 7th and 8th are united approximately at the apical 1/4; apex of elytra slightly obtuse ( Figs. 1 View FIGURES 1 – 4 , 7 View FIGURES 5 – 8 , 9 View FIGURES 9 – 10 ).
Ventral surface with chin piece normally arcuate; pronotosternal suture double, widely opened anteriorly; procoxal cavities small, rounded and separated, open behind; prosternal process quite short, wedge-shaped. Mesoventrite small, with transverse sutures, mesoventral cavity circular, mesepimeron triangular, mesocoxae open to mesepimeron. Metaventrite and mesoventrite separated by distinct suture, metaventrite relatively long and flat, with longitudinal suture; metepisternum normal; metacoxal plates slender, obtusely long triangular, evenly narrowed laterally. Abdomen with 5 visible ventrites, narrowed from the base of fifth visible ventrite, apical ventrite extending beyond elytra; ovipositor slightly extended ( Figs. 2, 4–6, 8 View FIGURES 1 – 4 View FIGURES 5 – 8 , 10 View FIGURES 9 – 10 ).
Legs with procoxa rounded, profemur slender, mesocoxa circular, much bigger than procoxa, mesotrochanter quite small, oval, metacoxa plates slender, obtusely long triangular, metatrochanter oval ( Figs. 6 View FIGURES 5 – 8 , 10 View FIGURES 9 – 10 ).
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.