Redescription of species. Body length 8.8–14.5 mm, width at humeri 1.7–2.2 mm.
Black; trochanters and bases of femora yellow; mouth parts, most parts of legs and antennae brownish. Body with long scattered erect setae and recumbent silvery pubescence,
which is sparser on head and abdominal sternites and absent on ventral sides of
head and prothorax. Elytra with a transverse band behind middle created by recumbent
dark-brown setae and pubescence, of which width is about 1/4 of elytral length.
Head finely irregularly rugose between eyes, with longitudinal rugose sculpture
under eyes and behind antennal bases. The last segment of maxillary palp stout (male,
Fig. 8) or slender (female, Fig. 9). Pronotum longer than broad, with very fine and
dense punctation. Elytra with 4 longitudinal rows of punctures, which are deep and
hollow-shaped anteriorly and missing at middle, with very fine indistinct sculpturing
between punctures, independently rounded apically, with a row of 7–10 pointed
tubercles behind humeri. Antennae long and thin, 1.5 (female) to 1.8 (male) times
longer than body; Scape dilated toward apex, reaching midlength of pronotum. Pedicel
very small, spherical, hidden inside apical hollow of scape. The relative length of antennal
joints (male and female almost same): 20:1:19:17:18:18:17:16:15:13:14.
Measurement on male: Elytra length: humeral width = ca. 3.1; pronotum length:
pronotum maximum width = ca. 1.1; elytra length: prothorax length = ca. 2.5. Measurement on the female: Elytra length: humeral width = ca. 3.2; pronotum
length: pronotum maximum width = ca. 1.1; elytra length: prothorax length = ca. 2.6.
Male terminalia (Figs 15–19): Tegmen approximately 1.6 mm in length; lateral
lobes slender, approximately 0.5 mm long and 0.1 mm wide, apex with short setae;
median lobe plus median struts slightly curved, subequal to tegmen in length; the
median struts less than 1/3 of the whole median lobe in length; dorsal plate shorter
than ventral plate; apex of ventral plate sharply pointed; internal sac moderately long,
about twice the median lobe in length, bearing a basal armature (Fig. 17) and two
apical rods of endophallus (Fig. 18), ejaculatory duct single (Fig. 18). Apex of tergite
VIII truncated with rounded sides (Fig. 19). Female terminalia (Figs 20–23): Paraproct
moderate in size, its baculi thick and long, straight and not bifurcate at base;
valvifer baculum very thick at base and narrowed towards apex (Fig. 20b); coxite lobes
sclerotized at each inner part, with tactile hairs; stylus articulated to the tip of each
coxite lobe, sclerotized except for apex and bearing tactile hairs (Fig. 22); dorsal baculi
straight and longer than paraproct baculi (Fig. 20a); proctiger baculi long and almost
straight (Fig. 20a). Spermathecal capsule (Fig. 23) is complex and coiled, composed of
two parts, with two openings to bursa copulatrix (or spermathecal duct); bigger one
with basal 1/4 twisted, strongly curved near middle; the other small part also strongly
sclerotized, curved and twisted at middle, connected with bigger part with a thin duct;
spermathecal gland (Fig. 23a) attached to middle of smaller part of capsule, membranous.
Tignum (Fig. 21) slightly longer than half of abdomen. In one measured specimen,
tignum was 2.3 mm for an adult with 4.2 mm abdomen length in ventral view.
Remarks. We consider Murzin’s kabakovi a different species from Pic’s postaurata
based on the following reasons:
1) Elytron with a row of 7–10 pointed tubercles behind humeri, while tubercles
missing in C. postaurata (based on the unique type specimen);
2) Elytral apex broader (bluntly rounded instead of sharply rounded) and elytra
shorter (the ratio of elytral length to basal width smaller);
3) Antennomere XI slight longer than antennomere X (much shorter in C. postaurata)
4) Hairs on elytra much shorter;
5) Pronotum with bigger lateral tubercles and swellings on the sides of the disc not as
flattened as that on C. postaurata;
6) Width of the dark-brown transverse band behind middle of elytra is about 1/4 of
elytral length, while in C. postaurata is only 1/6.
This species is recorded from China for the first time. It is the 28th recorded species
for the Chinese Disteniidae fauna.
Description from: Lin M, Murzin SV (2012) A study on the apterous genus Clytomelegena Pic, 1928 (Coleoptera, Disteniidae).
ZooKeys 216: 13–21. doi: 10.3897/zookeys.216.3769
Biology and ecology: Prior to this study, no biological or ecological information
was published on this species. The second author S. Murzin collected some specimens
of this species in Cuc Phuong National Park (N. Vietnam) on 3–5 May 1991 on leaves
of different plants. On 5 June 2011, Huihua Zeng collected one specimen on the
ground near a light trap, but it was not certain whether this was an accidental occurrence
or whether the specimen was attracted by light. Later (9 July 2011), the same
collector observed another specimen on a stump near the light trap, later crawling in
the leaf litter on the ground (Figs 24–26). The light trap was located in Damingshan
of Guangxi, a tropical rainforest, at the altitude of 1,200 m. The other collector, Xinlei
Huang, also collected one specimen at the same locality, by sweep net, which likewise
did not elucidate any information on its biology.
Eduard Vives collected one female on 14 June 2011 in Tam Dao National Park of
North Vietnam. It was crawling in a very antlike manner on the trunk of a large, recently
fallen tree (Fig. 27) that was also attracting many Agrilus (Buprestidae) and small
Lamiinae (genus Sybra, Pterolophia, Exocentrus). The day was very sunny and Eduard
watched this trunk for 80 minutes more and did not see any additional specimens of
Clytomelegena (personal communication, Aug. 2011).
In 2012, 3 additional specimens were collected in North Vietnam from Cao Bang
Province and Ninh Binh Province in April and May by an expedition of Steven Lingafelter,
Eduard Jendek, and Pham Hong Thai.
Description from: Lin M, Murzin SV (2012) A study on the apterous genus Clytomelegena Pic, 1928 (Coleoptera, Disteniidae). ZooKeys 216: 13–21. doi: 10.3897/zookeys.216.3769
ZooKeys 216: 13–21. doi: 10.3897/zookeys.216.3769