Soronia magnipunctura Chen & Huang, 2021

Chen, Xiaoxiao & Huang, Min, 2021, New species in the sap beetle genus Soronia Erichson (Coleoptera: Nitidulidae Nitidulinae) from China, Zootaxa 4908 (3), pp. 417-425 : 419-420

publication ID

https://doi.org/ 10.11646/zootaxa.4908.3.6

publication LSID

lsid:zoobank.org:pub:4F3CDA8B-7991-473F-A852-8C6875A057C5

DOI

https://doi.org/10.5281/zenodo.4450888

persistent identifier

https://treatment.plazi.org/id/0386E121-7752-C327-45EA-F957AAFEF9FA

treatment provided by

Plazi

scientific name

Soronia magnipunctura Chen & Huang
status

sp. nov.

Soronia magnipunctura Chen & Huang , sp. nov.

( Figs. 5–6 View FIGURES 1–6 , 19–20 View FIGURES 13–23 , 25, 29 View FIGURES 24–30 )

Specimens examined. Holotype, ³, China: Zhejiang Province, Linan City, Qingliangfeng National Nature Reserve, 13-05-2017 . Paratypes, 2³, same collection data as holotype; China: Inner Mongolia Region, Genhe City, Jinhe Town, center station of Hanma National Nature Reserve , 1³, 15-08-2017, 1 ³ 20-08-2017, Xiaoxiao Chen , NWAFU .

Description (male). Length 3.3 mm, width 1.7 mm. Body oblong, more or less convex. Dorsal and ventral surface light brownish yellow, antennal club dark, disc of pronotum and base of elytra with black stripes. Dorsal surface with decumbent yellowish pubescence, sparse and scattered thick semi-erect setae, ventral surface with decumbent yellowish pubescence ( Figs. 5–6 View FIGURES 1–6 ).

Head surface with punctures equal to eye facet, one diameter apart, interspaces microreticulate. Pronotal surface with punctures larger than those on head, 1.2–2.3 diameters apart, interspaces smooth to microreticulate. Elytral surface densely distributed with moderately coarse and large, oblong punctures, 0.8–2.5 diameters apart, interspaces smooth to microreticulate. Prosternum with unevenly distributed large punctures, 0.5–1.5 diameters apart, interspaces smooth. Mesoventrite with large, deep punctures distributed mainly in posterior parts, 0.5–2.2 diameters apart, interspaces microreticulate. Metaventrite with fine punctures medially, and punctures gradually larger laterally, interspaces smooth. Ventrites evenly scattered with fine punctures, 1.8–3 diameters apart, interspaces microreticulate.

Head disc and orbital part distinctly depressed. Labrum deeply notched medially. Mandibles prominent and projected from under labrum. Eyes strongly projected, with short setae. Antenna shorter than head width (including eyes); scape strongly swollen, triangular, and broadest anteriorly; antennomere 3 longer than pedicel and shorter than antennomeres 4–5 combined; antennomere 6 longer than 7; antennomere 7 subequal to 8; antennal club compact, with length 0.3× total antennal length, terminal antennomere symmetrical, distinctly shorter than previous two antennomeres combined ( Fig. 25 View FIGURES 24–30 ). Pronotum widest at basal 4/5; lateral margins widely explanate, anterior margin deeply emarginate, posterior margin slightly sinuate; anterior angles subvertical, posterior angles widely obtuse. Scutellar shield small, wide, triangular with apex rounded. Elytra less explanate laterally and gradually curved from middle to apex, apical angle subacute. Pygidium truncate apically and covered completely by elytra.

Last segment of maxillary palpomere slender, cylindrical and truncated apically. Last segment of labial palpomere cylindrical with apex truncate. Mentum pentagonal, with width 2.6× length. Antennal grooves deep, distinctly convergent posteriorly. Prosternum slightly raised medially, prosternal process widest behind procoxae and bent to mesoventral surface, distinctly truncate apically. Mesoventrite moderately carinate medially. Metaventrite moderately depressed medially. Distance between metacoxae nearly 2× width of mesocoxae and 2.3× width of procoxae. First abdominal ventrite along midline 2× longer than hypopygidium and 0.8× longer than ventrites 2–4 combined and pointed apically. Epipleuron wide, at base about twice as wide as antennal club.

Tibiae simple, outer apical angles slightly rounded ( Fig. 29 View FIGURES 24–30 ). All tarsi simple, weakly expanded, claws simple.

Male genitalia moderately sclerotized. Tegmen oblong with length 1.5× width, widest medially and gradually narrowing towards both apices, rounded apically with a shallow depression medially ( Fig. 19 View FIGURES 13–23 ). Median lobe oblong, equal to length of tegmen, broadly rounded and with pubescence apically ( Fig. 20 View FIGURES 13–23 ).

Diagnosis. This species can be easily distinguished from other species by: dorsal surface distinctly, coarsely punctate; protibia of male simple; median lobe with pubescence apically. It is similar to Soronia punctatissima (Illiger, 1794) , but differs by: dorsal surface without light brown markings; male protibia not abruptly expanded medially; apex of antennal club broadly rounded; last maxillary palpomere with truncate apex.

Biology and distribution. Specimens were collected from eastern (Zhejiang Province) and northern (Inner Mongolia Region) China. From Zhejiang, specimens were collected from flowers of Actinidiaceae during May; from Inner Mongolia, specimens were trapped using half-rotten muskmelons during August .

Etymology. The specific epithet is derived from the Latin adjectives “ magna ” (= large) and “ punctatus ”, referring to the body surface having large punctures.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Nitidulidae

Genus

Soronia

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