Cercyon (Clinocercyon) primoricus, Ryndevich & Prokin, 2017

Ryndevich, Sergey K. & Prokin, Alexander A., 2017, Two new species of Cercyon (Clinocercyon) from Russian Far East (Coleoptera: Hydrophilidae), Zootaxa 4300 (1), pp. 125-134 : 129-130

publication ID

https://doi.org/ 10.11646/zootaxa.4300.1.7

publication LSID

lsid:zoobank.org:pub:F69C90FE-3EC6-4C39-BCEC-732E5D3C8E1F

DOI

https://doi.org/10.5281/zenodo.6023936

persistent identifier

https://treatment.plazi.org/id/03F287B6-FFA5-7158-FF2B-D6A3962B39D5

treatment provided by

Plazi

scientific name

Cercyon (Clinocercyon) primoricus
status

sp. nov.

Cercyon (Clinocercyon) primoricus View in CoL sp. nov.

( Figs. 14–25 View FIGURES 14 – 17 View FIGURES 18 – 25 )

Type locality: Russia, Far East, South of Primorsky Krai, Lazovsky State Nature Reserve , Glazkovka.

Type material: Holotype: male, Lazovskiy zapovednik [Lazovsky State Nature Reserve], Glazkovka, 8– 20.08.2007, leg. V. Shokhrin, [in Russian], ( ZISP) . Paratypes (16): 1 male, 6 females, Yu. Primor’e , Khasanskiy r- n, okr. bukh. Perevoznaya [ South Primorye , Khasan district, near Perevoznaya bay], 25.VI.1990, na gribakh [on mushrooms], leg. K. Makarov [in Russian], ( MPU, CSR) ; 1 male, 1 female, Rossiya , Primorskiy kr., Lasovskiy r-n, Glazkovka [ Russia, Primorsky Krai, Lasovskiy district, Glazkovka], 17.VII.2003, leg. Yu. Sundukov, [in Russian], ( NMPC, MPU) ; 2 females, Yu. Primor’e , Ussuriyskiy zapovednik [S. Primorye, Ussuriyskiy State Nature Reserve], 14.VII.1987, leg. S. Kurbatov [in Russian] (CSK) ; 1 female, Yu. Primor’e , Khasanskiy r-n, Kedrovaya Pad' [ South Primorye , Khasan district, Kedrovaya Pad' Sate Nature Reserve], 26.VII.1987, leg. S. Kurbatov [in Russian] ( CSR) ; 1 male, Yu. Primor’e , Kamenushka bliz Ussuriysk [ South Primorye , river Kamenushka near Ussuriysk], 15.VI.1984, leg. Nikitsky [in Russian] ( ZMMU) . 1 male, 2 females, Vladivostok , botsad [ Russia, Vladivostok, botanical garden], 27.VI.1990, leg. I. Melnik [in Russian] ( ZISP, CSR) .

Differential diagnosis. Body broadly oval. Dorsal side without microsculpture ( Fig. 14 View FIGURES 14 – 17 ). Total colour brownish-yellow. Maxillary palpomeres yellow or brownish-yellow, palpomere 4 ca. 1.4× as long as palpomere 3 ( Figs. 14, 15 View FIGURES 14 – 17 ). Preepisternal plate very elongate, ca. 5.6–7.2× as long as wide, metaventrite without femoral lines. Femora without microsculpture ( Fig. 15 View FIGURES 14 – 17 ). Median projection of sternite 9 very narrow with large membranous part, phallobase longer than parameres, ca. 1.7× as long as parameres. Paramere with parallel sides cut along the inner edge at apex, with numerous very short setae, apex of parameres membranous with very short seta. Median lobe widest near middle, slightly narrowing apically, apex pointed and curved ( Figs. 18–25 View FIGURES 18 – 25 ).

Description. Form and Colour. Body broadly oval ( Fig. 14 View FIGURES 14 – 17 ), length 2.0– 2.4 mm, width 1.3–1.7 mm (holotype length 2.3, width 1.6). General colour of body brownish-yellow. Antennae yellowish except for brownish-yellow club. Maxillary palpomeres yellow or brownish-yellow. Epipleura colour as general body color. Ventral surface brownish-yellow, preepisternal plate darker. Legs yellowish-brown, tarsi paler ( Fig. 15 View FIGURES 14 – 17 ). Head. Dorsal side without microsculpture with dense moderately coarse punctures. Anterior margin of clypeus narrowly rimmed. Eyes small, somewhat protruding, interocular distance ca. 6.1–6.3 × as wide as one eye in dorsal view. ( Fig. 14 View FIGURES 14 – 17 ). Mentum glabrous, ca. 1.9–2.0× as wide as long, densely and coarsely punctate, slightly depressed anteromedially ( Fig. 15 View FIGURES 14 – 17 ). Antennae with 9 antennomeres, scapus ca. 1.2× as long as antennomeres 2–5 combined, club compact. Maxillary palpomere 2 strongly swollen, palpomere 4 ca. 1.4× as long as palpomere 3 in length ( Figs. 14, 15 View FIGURES 14 – 17 ). Thorax. Pronotum ca. 2.6× as wide as long. Pronotal punctation similar to that on head. Lateral margins of pronotum narrowly rimmed, the rim overlapping anterior and posterior corners, anterior and posterior margin without rim. Prosternum with strong longitudinal carina medially; antennal groove distinct, medium large, rounded laterally ( Fig. 15 View FIGURES 14 – 17 ). Preepisternal plate very elongate, ca. 5.6–7.2× as long as wide, widest in anterior part near middle or in middle ( Fig. 15 View FIGURES 14 – 17 ). Metaventrite with raised glabrous, clear sparsely punctate median pentagonal area; femoral lines absent. Elytra with 10 punctate striae, striae 1–5 very slightly impressed, striae 1–6, 9 reaching base, striae 7, 8 and 10 not reaching base. Elytral intervals flat. Ground punctures on intervals very fine ( Fig. 14, 16 View FIGURES 14 – 17 ). Humeral bulge not distinct. Elytra and pronotum without hairs. Epipleura of elytra wedge-shaped, bent downwards ( Fig. 15 View FIGURES 14 – 17 ). Femora with sparse and shallow punctures, without microsculpture ( Fig. 15 View FIGURES 14 – 17 ), with distinct tibial groove. Tarsi with densely arranged white setae ventrally, first metatarsomere about as long as metatarsomeres 2–3 combined. Abdomen. Abdomen with five exposed ventrites, first ventrite distinct longer than other ventrites, ca. 1.6× as long as second, with distinct median longitudinal carina, fifth ventrite arcuate, not emarginate apically ( Fig. 15 View FIGURES 14 – 17 ). Male genitalia ( Figs. 18–25 View FIGURES 18 – 25 ). Median projection of sternite 9 very narrow with large membranous part, median portion shorter than lateral struts ( Figs. 21, 25 View FIGURES 18 – 25 ). Phallobase longer than parameres, ca. 1.7× as long as parameres, asymmetrical basally. Parameres with parallel sides cut along the inner edge at apex, with numerous very short setae ( Figs. 18, 22 View FIGURES 18 – 25 ). Apex of parameres membranous with very short seta ( Fig. 23 View FIGURES 18 – 25 ). Median lobe widest near middle, slightly narrowing apically, with short ароdemes ( Figs. 19, 24 View FIGURES 18 – 25 ), apex pointed and curved; gonopore small, situated subapically ( Fig. 20 View FIGURES 18 – 25 ).

Variation. Some specimens have anterior and lateral sides of head slightly darker, brownish.

Etymology. The name reflects type locality, derived from derived from Primorye (physical-geographical region, including Primorsky Krai and southern (Trans-Amurian or Zaamurye part of the Khabarovsk Krai) (masculine).

Biology. Polysaprophagous, found in different decaying substances and on mushrooms.

Distribution. Russian continental Far East (Primorsky Krai).

ZISP

Zoological Institute, Russian Academy of Sciences

MPU

Universit� Montpellier 2

CSR

Caucasus State Nature Biosphere Reserve

NMPC

National Museum Prague

ZMMU

Zoological Museum, Moscow Lomonosov State University

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydrophilidae

Genus

Cercyon

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