Coccidula rufa (Herbst, 1783)

Szawaryn, Karol, Nedved, Oldrich, Biranvand, Amir, Czerwinski, Tomasz & Nattier, Romain, 2021, Revision of the genus Coccidula Kugelann (Coleoptera, Coccinellidae), ZooKeys 1043, pp. 61-85 : 61

Coccidula rufa (Herbst, 1783) Figs 1A, B, G , 7A-F , 8A-E

Dermestes rufus Herbst, 1783: 22.

Chrysomela pectoralis Fabricius, 1792: 328.

Silpha rosea Marscham, 1802: 123.

Coccidula conferta Reitter, 1890: 176.

Coccidula rufa var. unicolor Reitter, 1890: 176.

Coccidula rufa var. nigropunctata Reitter, 1900: 220.

Coccidula rufa var. plagiata Gerhardt, 1910: 556.

Material examined.

Czech Rep. , Zlín, 11.6.1999, lgt. L. Bureš (1: NMP); Mladá Boleslav, 25.4.1987, lgt. Nedvěd (1 male USB); Dvořiště, 9.8.1989, lgt. Nedvěd (1: USB); Kokořínský důl, 9.8.1995, lgt. J. Řehounek (1: USB); Kyrgyzstan , Toktogul , 26 VI 2003, leg. A. Lasoń, WJ 2870, (1 male: AJC); Montenegro , Skadar jez.- Virpazar, 5.6.1984, J. Strejček lgt. (1: NMP); Poland , Kampinos Forest near Warsaw, 17.06.2020, leg. D. Marczak, (7: MIZ); Russia , Leningrad-Lachta , IX 1988, J. Strejček lgt., (1: NMP); Ukraine , Kharkiv region, Dergachevsky district , Boliboki vill., 50°9'16.57"N, 36°3'58.87"E, 1.5.2017, lgt. A. Slutsky (1: ASC); Uzbekistan , Buchara/ Coccidula unicolor Rtt./ Coll. Reitter / MIZ PAN Warszawa 27/1955/1 (1: MIZ). Type material not studied, deposited in Museum für Naturkunde, Berlin, Germany .

Diagnosis.

Coccidula rufa is most similar in external appearance to C. reitteri , however it can be separated by the uniform testaceous coloration of the dorsal surface ( C. reitteri possesses dark macula near the elytral suture). From uniformly colored specimens of C. scutellata it can be separated by the shape of carinae on the prosternal process. Male genitalia are also very distinctive: in C. scutellata penis guide is small, about half length of parameres, while in C. rufa it is longer than parameres. Spermatheca in female genitalia of C. rufa is vermiform, not widening apically, while in C. scutellata it is distinctly widened in apical part.

Description.

Length = 2.5-3.2 mm, BL/BW = 1.88-2.00, EL/BW = 1.38-1.44, PW/BW = 0.80-0.82.

Body elongate, parallel sided. Elytra of typical (European) form testaceous without maculae (Fig. 1G ), only scutellar shield dark brown to black. Ventral side testaceous with prosternal process, mesoventrite, metaventrite, most of the ventrite 1 (except lateral corners), and central part of ventrite 2 black.

Head and pronotum covered with uniform small setiferous punctures arranged irregularly. Pronotum transverse, broadly rounded laterally, with moderately broad, lateral margin without glabrous area (Fig. 7B ); pronotum covered with dense setiferous punctures, with a single row of larger punctures along lateral border. Posterior pronotal corners not produced (Fig. 7B ). Prosternum with anterior margin with incomplete bordering line in median part, with a small sub-rounded impression in center. Prosternal process with lateral carinae straight, joined together roundly at level of anterior border of procoxae, forming sub-triangular pattern (Fig. 7C ).

Scutellar shield pentagonal, covered with dense setiferous punctures. Elytra covered with two types of punctures, small setiferous punctures irregularly distributed throughout elytral surface, some of these punctures surrounded by larger depressed circles forming nine irregular longitudinal rows along whole length of elytra. Lateral elytral margin well visible throughout (Fig. 7A ). Mesoventrite with complete anterior border. Metaventrite with postcoxal lines descending laterally, fused on metaventral process in median part, forming continuous arc (Fig. 7E ), covered with setiferous punctures very sparsely distributed in central part of sclerite, densely setose in lateral parts, without distinct rows of large punctures below postcoxal lines, large punctures above metacoxae present.

Abdominal postcoxal lines complete, arcuate, reaching half of length of ventrite 1 measured below metacoxa. Ventrites covered with sparse setiferous punctures.

Male genitalia. Tegmen in inner view (Fig. 8A ) with penis guide sub-parallel to broadly rounded, with rounded apex; in lateral view (Fig. 8B ) expanded medially, with deeply emarginated upper margin; long, much longer than parameres. Parameres elongate, parallel sided, with just slightly narrower base, inner surface smooth, with fringe of long setae in apical part. Penis simple with sharply pointed and curved apex, with small bump before apex (Fig. 8C ).

Female genitalia. Sperm duct long, longer than spermatheca (Fig. 8E ). Spermatheca vermiform, not distinctly broadened apically. Accessory gland membranous, much shorter than sperm duct.

Type locality.

Berlin (Germany)

Distribution.

Europe (all countries), Africa: Morocco, Asia: Afghanistan, China, Russia (Siberia), Iran, Kazakhstan, Kyrgyzstan, Mongolia, Turkey, Uzbekistan.

Figures

Figure 1. Immature stages and habitus of adult species of Coccidula Kugelann A C. rufa larva B C. rufa pupa C C. lepida, dorsal D C. lepida, ventral E C. litophiloides F C. reitteri G C. rufa H C. scutellata A, B Gilles San Martin, Wikimedia Commons C, D Danny Haelewaters G, H Udo Schmidt. Scale bars: 1 mm (C-H).

Figure 7. Coccidula rufa (Reitter) SEM illustrations A body, dorsal B pronotum C head and prothorax, ventral D antenna E mesoventrite, metaventrite and ventrite 1 F ventrites 4 - 6, female. Scale bars: 1 mm (A); 500 µm (B, C, E, F); 400 µm (D).

Figure 8. Coccidula rufa (Reitter) A tegmen, inner B tegmen, lateral C penis, lateral D male genital segment, dorsal E spermatheca. Scale bar: 500 µm (A-E).