Review of species of the genus Cercyon Leach, 1817 of Russia and adjacent regions. V. Subgenus Cercyon Leach, 1817. Cercyon nigriceps-group (Coleoptera: Hydrophilidae)

2010·0.35 MB·

by  S. K. Ryndevich

ZOOSYSTEMATICA ROSSICA, 19(2): 330–340 30 DECEMBER 2010
Review of species of the genus Cercyon Leach, 1817 of Russia
and adjacent regions. V. Subgenus Cercyon Leach, 1817.
Cercyon nigriceps-group (Coleoptera: Hydrophilidae)
Обзор видов рода Cercyon Leach, 1817 фауны России и
сопредельных территорий. V. Подрод Cercyon Leach, 1817.
Группа Cercyon nigriceps (Coleoptera: Hydrophilidae)
S.K. RYNDEVICH* & F. HEBAUER
С.К. РЫНДЕВИЧ*, Ф. ХЕБАУЭР
S.K. Ryndevich, Baranovichi State University, 21 Voykova St., Baranovichi, 225404, Brest Province, Belarus.
E-mail: [email protected]. *Corresponding author.
F. Hebauer, Johann-Krümpel Straße 1, D-94447 Plattling, Germany. E-mail: [email protected]
Morphological diagnoses, distribution and environmental preferences of species of the Cercy-
on nigriceps-group (subgenus Cercyon Leach, 1817) from Russia and adjacent regions are pre-
sented. Cercyon paranigriceps sp. nov. from the Russian Far East and Myanmar is described.
Cercyon nigriceps (Marsham, 1802) is recorded from Malta, Ukraine, Gambia and Nepal for
the first time; C. setiger Wu & Pu, 1995 is for the first time recorded from Guizhou (China).
Приводятся морфологические диагнозы, данныео распространении и биотопических
предпочтениях видов группы Cercyon nigriceps (подрод Cercyon Leach, 1817) фауны Рос-
сии и сопредельных территорий. Описан Cercyon paranigriceps sp. nov. с Дальнего Вос-
тока России и из Мьянмы. Cercyon nigriceps (Marsham, 1802) впервые указан из Мальты,
Украины, Гамбии и Непала, а C. setiger Wu & Pu, 1995 из провинции Гуйчжоу (Китай).
Key words: Hydrophilidae, Cercyon, taxonomy, distribution, new species
Ключевые слова: Hydrophilidae, Cercyon, систематика, распространение, новый вид
INTRODUCTION The territory under study includes a sig-
nificant part of Central and Eastern Palae-
At present, the genus Cercyon Leach
arctic within the former Soviet Union and
comprises 256 species (including the new
the adjacent countries of Europe and Asia.
species described here), has a world-wide Marsham (1802) described Cercyon ni-
distribution and is subdivided into 11 sub- griceps from Britain. It is distributed in the
genera. This article is the third in the series Palaearctic, Nearctic, Afrotropical, Orien-
of papers on the genus Cercyon of Russia and tal and Neotropical regions. Our research
adjacent regions. The previous papers of this allowed to describe a new species, C. para-
series deal with species of the Clinocercyon nigriceps from the Russian Far East and
and Conocercyon (Ryndevich, 2007c), Para- Myanmar, very similar to C. nigriceps. The
cycreon and Dicyrtocercyon (Ryndevich, Cercyon nigriceps group includes, in addi-
2008), species of the C. dux group (Rynde- tion to the two above-mentioned species, C.
vich, 2001a), C. lateralis group (Ryndevich, setiger Wu & Pu, 1995 (Oriental Region),
2004a), C. olibrus group and C. rotundulus C. tachyorictidis Jeannel & Paulian, 1945
group (Ryndevich, 2007b), all of the subge- (Afrotropical Region), C. minax Balfour-
nus Cercyon. Browne, 1958, C. subtilis Knisch, 1922, C.
© 2010 Zoological Institute, Russian Academy of Scienсes
S.K. RYNDEVICH & F. HEBAUER. REVIEW OF CERCYON 331
wittei d’Orchymont, 1950 and C. deserticola In Russian and adjacent territories, two
Fikáček, Gentili & Short, 2010. species of this group can be encountered,
their morphological diagnoses, distribution
MATERIAL AND METHODS and environmental preferences are given
below.
The paper is based on the material from
the Zoological Institute of the Russian
Cercyon (Cercyon) nigriceps
Academy of Sciences, St. Petersburg, Rus-
(Marsham, 1802)
sia (ZIN), of the Natural History Museum,
London, U. K. (BMNH), Zoological Mu- Dermestes nigriceps Marsham, 1802: 72.
seum of Moscow State University, Moscow, Sphaeridium melanocephalus var. nigriceps Mar-
Russia (ZMUM) and from Dr A.A. Prokin sham, 1802: 103.
(CAP) and authors’ collections: F. Hebau- Dermestes atricapillus Marsham, 1802: 72.
er’s (CFH) and S. Ryndevich’s (CSR). Dermestes melanocephalus var. atricapillus (Mars-
ham, 1802).
Material was examined with a Leica MZ
Cercyon atricapillum (Marsham, 1802).
12.5 stereomicroscope and MBS-10 stereo-
Cercyon nigriceps var. atricapillum (Marsham,
microscope.
1802).
The possibility of identification of Cer-
Dermestes laevis Marsham, 1802: 73.
cyon species on the basis of habitus, colour, Cercyon laeve (Marsham, 1802): Stephens, 1829.
male genitalia, structure of mesoventrite Dermestes inustus Marsham, 1802: 76.
and metaventrite has been studied. The cri- Cercyon inustum (Marsham, 1802): Stephens,
teria according to which the species were 1829.
united into groups were discussed earlier Sphaeridium centrimaculatum Sturm, 1807: 23.
Cercyon centrimaculatum (Sturm, 1807).
(Ryndevich, 2004a).
Cambrus centromaculatus Sturm, 1807.
Cercyon (s. str.) nigriceps var. centrimaculatum
Cercyon nigriceps-group
(Sturm, 1807).
Cercyon nigriceps ab. centromaculatus (Sturm,
The Cercyon nigriceps-group includes
1807).
very small species (1–2 mm) with oval
Cercyon atriceps Stephens, 1829: 151.
body, linear clypeus, black head, brown
Cercyon nigriceps var. atriceps Stephens, 1839.
pronotum, pale maxillary palpi, elytra from Cercyon ustulatum Stephens, 1829: 152.
yellow to brownish yellow (sometimes with Cercyon bimaculatum Stephens, 1829: 152.
dark spots) without microsculpture, flat Cercyon testaceum Stephens, 1829: 152 (partim).
anterior part of elytral intervals and con- Cercyon nubilipenne Stephens, 1835: 401.
vex posterior part, narrow or very narrow Cercyon troglodytes Dejean, 1836: 149.
Cercyon pulchellum Heer, 1841: 492.
preepisternal elevation; metasternum with
Cercyon mundum Melsheimer, 1844: 102.
femoral lines. The species inhabit different
Cercyon vicinale Walker, 1859: 258.
kinds of decomposing organic matter.
Cercyon nigriceps Motschulsky, 1863: 445.
Species of the C. pygmaeus, C. terminatus,
Cercyon nigriceps ab. simplex Delahon, 1913: 530.
C. impressus and C. melanocephalus groups Cercyon atricapillus (Marsham, 1802): Stephens,
come close to the C. nigriceps group in the 1829; Vogt, 1968, 1971; Smetana, 1978, 1988;
presence of femoral lines, but differ in some Baranowski, 1985; Bellstedt & Merkl, 1987;
features. Species of the C. impressus and C. Hebauer, 1988, 1995a, 1995b; Krause &
melanocephalus groups have larger size (2– Zinke, 1989; Kubisz & Szwałko 1991; Rough-
ley, 1991; Alexandrovich et al., 1996; Telnov
3.5 mm) and differ in colour and other char-
et al., 1997; Prokin et al., 2002.
acteristics; species of the C. pygmaeus and
Cercyon nigriceps (Marsham, 1802): Stephens,
C. terminatus groups (size 1–2 mm) differ in
1829; Zaitsev, 1908, Knish, 1924; Winkler,
disposition of femoral lines, form of preep- 1926; d’Orchymont, 1928; Silfverberg, 1992,
isternal elevation and colour. They have 2004; Jia, 1996; Romero-Alcaraz, Sánchez-
base of pronotum without fine border. Piñero, Áliva, 1997; Hansen, 1999, 2004;
© 2010 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 19(2): 330–340
332 S.K. RYNDEVICH & F. HEBAUER. REVIEW OF CERCYON
Ryndevich, 2004b, 2005, 2007a; Rynde- Holzschuh, Fifa 1240 m, nr. Gixan, 27–31
vich & Zemoglyadchuk, 2003; Ryndevich March 1983, 1 specimen (CFH).
& Tsinkevich, 2004; Hebauer& Ryndevich, Oriental Region. China. 1 specimen,
2005; Hebauer, 2006.
Foochow, 28 May 1957, leg. M.S. Yang
Type material. Holotype. Sri Lanka; female, (CSR). Laos. 1 specimen, Laos centr.,
“Type H.T.”, “6352”, “Cercyon vicinale W.”
70 km NE Vientiane, Ban Phabat env.,
(Walker’s writing), “Cercyon nigriceps (Mar-
150 m, N18°16.1´, E103°10.9´, 27 Apr. – 1
sham), det. Ryndevich S.K., 2008”.
May 1997, leg. E. Jendek & Sausa (CFH);
Additional material. Palearctic Region. Aus-
11 specimens, Laos NE, Hua Phan Prov.,
tria. 1 specimen, Vorarlberg, 3630, Lauteracher
Ried 405 Soren-Lustenau Schw. Ried 12 June 25 km SE Vieng Xai, Ban Kangpabong env.,
1996, Autokäscher, 21 00 Uhr, leg. Ing. Kapp N20°19´, E104°25´, 14–18 May 2001, leg. J.
(CFH); 1 specimen, Austria-VLBG 11529, Nen- Bezdek (CFH). Nepal. 1 specimen, Nepal,
zing Tschalenga 520–540 m, 13 May 1992, Au- Prov. Narayani, Sauraha, Rapti River Ufer,
tokäscher, leg. C.M. Brandstetter (CFH). Bela- 180 m NN, 27°34´80´´N, 84 29´49´´E, LF,
rus. 1 specimen, Brest Prov., Baranovichi Distr.,
18 Apr. 2000, leg. A. Weigel (CFH). Thai-
16 July 1999, horse dang, leg. S.K. Ryndevich
land. 3 specimens, Mae Hong Son Prov.,
(CSR); 1 specimen, Brest Prov., Pruzhani Distr.,
N19°27´, E18°20´, 25 May – 2 June 1999,
Ruzhany, at light, 3 Aug. 2002, leg. Lundychev
D.S. (CSR). Estonia. 1 specimen, Yuriev [now leg. Hauck (CFH). Vietnam. 4 specimens,
Tartu], 7 June 1903 (ZIN). Italy. 3 specimens, 180 km SSW of Hanoi, 40 km SW of Than
Italia, 356 (ZIN). Malta. 1 specimen, Malta, coll. Hoa, Ben En Natn. Park, 5–8 July 1997, leg.
Raffroy (ZIN). Russia. 1 specimen, Yarosl. [avl] Napolov (CFH).
gub. [ernia], coll. Yakovlev, 8 July 1894, at flight Note. A large number of synonyms reveal
(ZIN); 3 specimens, coll. F. Zaitzev (ZIN); 1
not only wide distribution and an extensive
specimen, [Lipetsk Prov.] 30 km E of Elets, Mo-
variability, but also difficult identification of
rozova gora locality, 14 June 1996; estate, light
the species. Of course it was not possible to
trap, leg. Tsurikov (CAP). 1 specimen, 30 km E
verify all listed synonyms, but in consider-
of Elets, Morozova gora locality, 25 July 1998;
at UV light, leg. Tsurikov (CAP); 1 specimen, ation that most of them have been described
50 km W of Lipetsk, “Galich’ya Gora” nature from Western Europe (except C. mundum
Reserve, leg. Prokin, 8–9 July 1999, leg. Prokin Melsheimer (U.S.A.) and C. vicinale Walker
(CAP); 2 specimens, Kursk Prov., Tsentral’no- (Sri Lanka)) it is improbable that the spe-
Chernozyomnyi Nature Reserve, Streletskaya cies under description are conspecific with
Step’ Division, cow dung, 21 July 2001, leg.
any of the listed synonyms. We examined
Prokin (CAP); 4 specimens, “UdSSR, Primor-
holotype of C. vicinale Walker, 1859 only.
skij Kraj, Tschernye Gory, Lux., Venedivnovo,
This specimens (female) has all the charac-
1–3 Aug. 1990, leg. A. Pütz” (CFH). Ukraine.
2 specimens, near Kiev (ZMUM); 1 specimen, teristics of C. nigriceps.
[Crimea] Al’ma, 29 May 1920 (ZIN). Description. Body oval (index length/
Afrotropical Region. Botswana. 1 width 1.6), widest at base of elytra (Fig. 1).
specimen, Botswana, 11 March 1993, Dorsal side slightly convex, shiny, without
18°33´55´´S/24°03´53´´E, Chobe NP Savu- microsculpture. Head black. Clypeus lin-
ti-Camp, lux, leg. M. Uhlig (CFH). Gambia. ear, truncate anteriorly. Punctation of head
1 specimen, W. Afr. Gambia, Yundum, 17 Jan. fine and dense. Maxillary palpi yellowish to
1968, leg. Leier (CFH). Namibia. 1 speci- brownish yellow, ultimate segment darker.
men, South West Africa, Okahandja, 1249 Antennae yellow to brownish. Pronotum
m, 14 March 1979, leg. H. Roer (CFH); 1 transverse, brown with brownish yellow
specimen, SWA/Namibia, Dőbra bei Wind- or yellow anterior side and lateral margins.
hoek, 27 March 1988, leg. H. Roer (CFH). Sides of pronotum weakly rounded, arcu-
Rwanda. Rwanda, Gyangugu Nyakabuye, ately diverging just before posterior an-
28 Oct. – 2 Nov. 1983, leg. Mühle, 1 speci- gles, then converging anteriad. Lateral rim
men (CFH). Saudi Arabia. Saudi Arabia, c. continued around hind angles. Punctation
© 2010 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 19(2): 330–340
S.K. RYNDEVICH & F. HEBAUER. REVIEW OF CERCYON 333
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© 2010 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 19(2): 330–340
334 S.K. RYNDEVICH & F. HEBAUER. REVIEW OF CERCYON
of pronotum similar to that of head. Pos- Comments. The structure of the apex of
terior angles of pronotum widely rounded the paramere is clearly visible only when
(Fig. 4). Base of pronotum with fine border. enlarged. In normal state the apices of
Scutellum brown, very finely and sparsely parameres are directed outside (everted),
punctate. Elytra yellow or brownish yel- and a thick bundle of long hairs is directed
low with nine complete deep and one short upwards. However the apex can be directed
punctate stria. Colouration of elytra varied inside during preparation, thus being glued
(Figs 5–10). Some specimens have brown- to the bundle of long hairs and looking like
ish central spot as in Figs 5–8, but some an entire structure and hairs become prac-
do not (see Figs 9, 10). Striae distinctly tically indistinguishable as in Fig. 16. With
impressed apically, not reaching apex. In- dry preparations of male genitalia of this
tervals of elytra with shallow and regular species the structure of the paramere apex
punctation, finer than that of head and is difficult to observe due to its malforma-
pronotum. Anterior part of elytral intervals tion upon drying. These facts can explain
flat, posterior part convex, but intervals at the differences in the figures of C. nigriceps
apex flat. Second interval a bit wider than parameres apices by different authors (Vogt,
the 3rd and 4th. Ventral side dark brown 1968, 1971; Smetana, 1978, 1988; Hebauer,
or black. The majority of specimens have 1995b (as Cercyon sp. 2); Ryndevich, 2004b;
metasternal pentagon, preepisternal eleva- Ryndevich & Tsinkevich, 2004).
tion, and apex of abdominal segments from Comparison. The species is very simi-
brown to yellowish brown. Proventrite tec- lar to C. (Cercyon) setiger Wu & Pu, 1995.
tiform, finely carinate medially. Preepister- Cercyon setiger is distributed in the Oriental
nal elevation parallel-sided, very narrow Region: China (Guangdong, Guizhou (new
(length : width ratio 8.2–8.7), contacting record)) and Myanmar (Jia, 1996; Hebauer
elevated middle portion of metasternum at & Ryndevich, 2005). We examined material
single point (Fig. 11). Epipleura flat, hori- of C. setiger: China, 9 specimens, China: B.M.
zontal. Metasternum forming no ridge and 1980-491, P.M. Hammond, Guizhou: 20 m. S.
not delimiting small anterolateral portion Guinn, 22 Sept. 1980, cow dung (BMNH);
of metasternum. Metasternal pentagon flat, 4 specimens, China: B.M. 1980-491, P.M.
shiny, with very dense shallow punctuation Hammond, Guangdong: Guangzhou, Bai-
and two small deepenings in posterior part yunshan, 27 Sept. 1980 (BMNH). Myan-
(Fig. 11). Length of preepisternal elevation mar, 2 specimens, Burma, Kinda-Stausee,
: length of metasternal pentagon ratio – 1.2. Einzugzgeb. d. Palaung-Flusses, Lichtfang,
Metasternum with complete clear femoral 23–25 Nov. 1989, Tobias (CFH, CSR).
lines, attaining anterior margin of metaster- Cercyon setiger differs in the shape of
num. First segment of abdomen with me- preepisternal elevation, structure of the
dian carina, as long as 2nd and 3rd seg- male genitalia, length of the 1st segment
ments combined. Male genitalia as in Figs of abdomen. Body oval (index length/
14–18. Apices of parameres membranous. width 1.6), widest in middle of elytra, more
Inner side of paramere near apex with thick abruptly narrowed than in C. nigriceps (Fig.
bundle of long dark hairs; in addition, short 3). Elytra yellow or brownish yellow. The
hairs present on apex of paramere (Figs majority of the examined specimens have no
14–16). Median lobe gradually narrowed brownish central spot, but some do (Fig. 5).
to very sharp apex (Fig. 18). Base of genital The 2nd elytral interval is much wider than
segment straight (Fig. 17) Sclerotization the 3rd and a bit wider than the 4th (Fig. 3).
of genital segment not complete. Apex of Preepisternal elevation is not parallel-sided,
genital segment with sparse hairs. Legs yel- spear-shaped, narrow (length : width ratio
lowish or brownish yellow with paler tarsi. 5.6–6), contacting elevated middle portion
Length 1–2 mm. of metasternum at single point (Fig. 13).
© 2010 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 19(2): 330–340
S.K. RYNDEVICH & F. HEBAUER. REVIEW OF CERCYON 335
First segment of abdo-
men with medial cari-
na, has length vividly
more than the length
of the second and third
segments combined.
Male genitalia shown
in Figs 22–24. Apex
of parameres membra-
nous. The inner side of
paramere near apex has
a thick bundle of dark
hairs, the outer sides
are more rounded than
those with C. nigriceps
(Fig. 22). Medial lobe
is abruptly narrowed to Figs 11–13. Cercyon. 11, C. nigriceps, preepisternal elevation and
the apex (Fig. 23). Base metasternal pentagon; 12, C. paranigriceps, preepisternal elevation
of genital segment ang- and metasternal pentagon; 13, C. setiger, preepisternal elevation.
lular (Fig. 24). Length
1.3–1.9 mm.
Cercyon nigriceps is similar to C. (Cer- Is., Namibia, Rwanda, Saudi Arabia (south),
cyon) deserticola Fikáček, Gentili & Short. Seychelles, Tanzania, Zaire.
This species differs in the shape of preep- Oriental Region: Bhutan, Nepal (new
isternal elevation (length : width ratio 2.2– record), China (Fujian), Taiwan, India, Sri
3.8) and structure of the male genitalia. Lanka, Vietnam, Laos, Thailand, Indonesia,
Distribution. Palaearctic Region: Aus- Philippines.
tria, Azores, Belarus, Britain, Canary Is., Environmental preferences. The spe-
Croatia, “Czechoslovakia”, Denmark, Es- cies occurs in dung of horse, cow and other
tonia, Finland, France, Germany, Hungary, mammals, and in rotting plants. It comes
Ireland, Italy, Japan, Latvia, Lithuania, Ma- frequently to light.
deira, Malta (new record), the Netherlands,
Norway, Poland, Portugal, Romania, Russia Cercyon (Cercyon) paranigriceps sp. nov.
(European part, Far East), Sweden, Swit-
zerland, Tunisia, Ukraine (new record). Type material. Holotype: male; Russia, /”Pri-
Nearctic Region: Canada (Alberta, morskiy Kray/ PrK.: Tshernye Gory,Venedivnovo,
1–3.8.1990, leg. A. Putz” (CFH).
Nova Scotia, Quebec), USA (Alabama, Cal-
Paratypes: Russia, 1 female, same data as
ifornia, District of Columbia, Florida, Geor-
holotype (CSR). Myanmar, 2 males, 1 female,
gia, Idaho, Illinois, Indiana, Kansas, Louisi-
Burma, Kinda-Stausse, Einzugsgeb., d. Palaung-
ana, Maryland, Massachusetts, Michigan,
Flusses, 23–25 Feb. 1989, Lichtfang., leg. Tobias
Mississippi, Missouri, New Hampshire, New (CFH); 1 female, Burma, Kinda-Damm, 23–25
Jersey, New York, North Carolina, Oregon, Feb. 1989, Lichtfang., leg. Tobias (CFH)
Pennsylvania, Tennessee, Texas). Records Description. Body oval (length/width
from the Nearctic need confirmation. 1.6), widest at base of elytra (Fig. 2). Dor-
Neotropical Region: Jamaica, Lesser sal side slightly convex, shiny, without mi-
Antilles (Tobago), Panama, Paraguay, Ar- crosculpture. Head black. Clypeus linear,
gentina. truncate anteriorly. Punctation of head
Afrotropical Region: Botswana, Gam- fine and dense. Maxillary palpi yellowish to
bia (new record), Madagascar, Mascarene brownish yellow, ultimate segment darker.
© 2010 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 19(2): 330–340
336 S.K. RYNDEVICH & F. HEBAUER. REVIEW OF CERCYON
8,
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© 2010 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 19(2): 330–340
S.K. RYNDEVICH & F. HEBAUER. REVIEW OF CERCYON 337
Antennae yellow to brown-
ish. Pronotum transverse,
brown with brownish yel-
low or yellow anterior and
lateral margins. Sides of
pronotum weakly rounded,
arcuately diverging just
before posterior angles,
then converging toward
anterior margin. Lateral
rim continued around hind
angles. Punctation of pro-
notum similar to that of
head. Posterior angles of
pronotum widely rounded.
Base of pronotum with fine
border. Scutellum brown,
very finely and sparsely
punctate. Elytra yellow
or yellowish brown with
nine complete deep and
one short punctate stria.
Central spot in available
specimens absent. Striae
distinctly impressed api-
cally, not reaching apex.
Intervals of elytra with Figs 22–24. Cercyon setiger, male genitalia. 22, tegmen with
parameres (dorsal view); 23, median lobe (dorsal view); 24, geni-
shallow and regular punc-
tal segment (ventral view). Scale: 0.5 mm.
tation finer than that on
head and pronotum. An-
terior part of elytral intervals flat, poste- lines, attaining anterior margin of metaster-
rior part convex, but intervals at apex flat. num. First segment of abdomen with me-
Second interval somewhat wider than 3rd dial carina, as long as 2nd and 3rd segments
and 4th. Ventral side brownish yellow. Me- combined. Male genitalia as in Figs 19–21.
sosternum and metasternum brown, apex of Apex of paramere widened, not everted. In-
abdominal segments yellowish. Proventrite ner side of paramere near apex with thick
tectiform, finely carinate medially. Preep- glued dark hairs (Fig. 19). Median lobe wide
isternal elevation parallel-sided, very nar- (Fig. 20). Base of genital segment straight
row (length : width ratio 9.2), contacting (Fig. 21). Legs yellowish or brownish yel-
elevated middle portion of metasternum at low with paler tarsi. Length 1.3–1.5 mm.
single point (Fig. 12). Epipleura flat, hori- Comparison. The new species is very
zontal. Metasternum forming no ridge and similar to C. nigriceps, differing from it in
not delimiting small anterolateral portion the shape and in the sparser punctation of
of metasternum. Metasternal pentagon flat, the preepisternal elevation and metasternal
shiny, with very dense shallow punctation, pentagon. Length : width ratio of preep-
with two small deepenings in posterior part isternal elevation in C. paranigriceps is 9.2,
(Fig. 12). Length of preepisternal elevation in C. nigriceps, 8.2–8.7. Length of preep-
: length of metasternal pentagon ratio 1.5. isternal elevation : length of metasternal
Metasternum with complete clear femoral pentagon ratio in C. paranigriceps equals
© 2010 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 19(2): 330–340
338 S.K. RYNDEVICH & F. HEBAUER. REVIEW OF CERCYON
1.5, that in C. nigriceps, 1.2. Ventral side of Bellstedt, R. & Merkl, O. 1987. Hydraeni-
C. paranigriceps is paler. Apical portions of dae, Hydrochidae, Spercheidae, Helophori-
the parameres of C. paranigriceps are not dae, Hydrophilidae and Georissidae of the
Kiskunság National Park (Coleoptera). Nat-
everted, and the median lobe is wide.
ural History of the National Parks of Hungary,
The C. nigriceps group includes African
5: 169–174.
species C. tachyorictidis Jeannel & Paulian,
Fikáček, M., Gentili, E. & Short, A.E.Z. 2010.
1945 and C. minax Balfour-Browne, 1958.
Order Coleoptera, family Hydrophilidae. In:
These species as well as C. paranigriceps have Harten van, A. (Ed.). Arthropod fauna of the
wide median lobe but their genital segment UAE, 3: 135–165. Dar Al Ummah Printing,
is widened at the apex, and apical portions of Abu Dhabi.
the parameres are directed inside unlike C. Hansen, M. 1999. Hydrophiloidea (s. str.)
nigriceps, C. setiger and C. deserticola. In ad- (Coleoptera). World catalogue of insects, 2:
1–416. Apollo Books, Stenstrup.
dition, apices of parameres are not widened
Hansen, M. 2004. Family Hydrophilidae. In:
in C. tachyorictidis and C. minax.
Löbl, I. & Smetana, A. (Eds). Catalogue
Comments. Record of Cercion sp. pr. atri-
of Palaearctic Coleoptera. Volume 2. Hydro-
capillus (Hebauer, 1995b) refers actually to
philoidea – Histeroidea – Staphylinoidea:
C. paranigriceps sp. nov. 44–68. Apollo Books, Stenstrup.
Distribution. Palaearctic Region: Rus- Hebauer, F. 1988. Hydrophiloidea aus Namibia
sia (Far East: Primorskiy Territory); Orien- (Coleoptera; Hydrophilidae, Spercheid-
tal Region: Myanmar. ae). Bonner Zoologische Beiträge, 39(2/3):
Environmental preferences. Similar to 153–161.
Hebauer, F. 1995a. Die Hydrophilidae and
those of C. nigriceps.
Spercheidae Namibias. Unter Berücksichi-
gung des Materials der Namibia-Expedition
ACKNOWLEDGEMENTS des Museums für Naturkunde Berlin 1992,
ergänzt durch Nachweise aus früheren Na-
I am very grateful to the late G.S. Medve- mibia- und Kalahari-Expeditionen (Coleo-
dev and A.G. Kirejtshuk (Zoological Institute, ptera, Hydrophiloidea: Hydrophilidae et
Russian Academy of Sciences, St. Petersburg, Spercheidae). Mitteilungen aus dem Zoologis-
Russia), C. Taylor (The Natural History Mu- chen Museum in Berlin, 71(2): 251–275.
seum, London, UK), N.B. Nikitsky (Zoological Hebauer, F. 1995b. Bekannte und neue Hy-
Museum of Moscow State University, Moscow, drophiloidea aus Ostsibirien (Col.). Entomol-
Russia), A.A. Prokin (Voronezh State Univer- ogische Nachrichten und Berichte, 39: 29–36.
sity, Voronezh, Russia), D.S. Lundyshev (Bara- Hebauer, F. 2000. Results of the Lund Univer-
novichi State University, Baranovichi, Belarus) sity Ceylon Expedition 1961, Hydrophilidae
for lending the material, A.V. Zemoglyadchuk with an updated Sri Lanka check list (Co-
(Baranovichi State University, Baranovichi, Be- leoptera: Hydrophilidae). Acta coleoptero-
larus) for help in preparation of genitalia figures, logica, 16(2): 3–13.
E.G. Karapetova (Baranovichi State University, Hebauer, F. 2001. Beitrag zur Kenntnis der Hy-
Baranovichi, Belarus) for help in the translation drophilidae von Neuguinea. Ergebnisse der
of the manuscript. zoologischen Forschungsreisen von M. Balke
und L. Hendrich nach West Neuguinea (Irian
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