Review of Cycadophila Xu, Tang & Skelley (Coleoptera: Erotylidae: Pharaxonothinae) inhabiting Cycas (Cycadaceae) in Asia, with descriptions of a new subgenus and thirteen new species
Author
Skelley, Paul
Author
Xu, Guang
Author
Tang, William
Author
Lindström, Anders J.
Author
Marler, Thomas
Author
Khuraijam, Jibankumar Singh
Author
Singh, Rita
Author
Rich, Stephen
text
Zootaxa
2017
4267
1
1
63
journal article
33061
10.5281/zenodo.575641
810b55e4-b8ba-4368-bf9c-8517ee33e7d0
1175-5326
575641
8920893E-E5F8-482A-A60D-7A248D2B0DCB
Cycadophila
(
Cycadophila
)
discimaculata
(Mader)
,
new combination
Figs. 9
A–F
Pharaxonotha discimaculata
Mader 1939
: 46
;
Węgrzynowicz 2007
: 536
.
Pharaxonata
[sic]
discimaculata
:
Mader 1955
: 65
.
Adult diagnosis.
A member of
Cycadophila
(
Cycadophila
)
nigra
species group as discussed above, readily distinguished from other member of the genus by the narrowed body, nearly quadrate pronotum, and color pattern.
Adult description.
Length
4.06–4.29 mm
, width
1.53–1.59 mm
. Body in dorsal view elongate, sides nearly straight and parallel, greatest width at middle of elytra; in lateral view convex dorsally. General body and appendage color dark reddish-brown, pronotum with orange-brown sides, elytra mostly orange-brown with dark maculation along suture nearly touching base, widening broad central spot, ending 1/3 elytral length from apex; dorsal surface distinctly punctate, surface appearing slightly shiny, dorsal punctation with short procumbent hairs, ventrally mostly covered with short procumbent setae.
FIGURE 9.
Photographs of
Cycadophila
(
Cycadophila
)
discimaculata
, A) dorsal habitus of holotype; B) ventral head and prothorax of paratype; C) lateral habitus of holotype; D) holotype labels; E) lateral view of head and prothorax of holotype; F) male genitalia of paratype.
Head
in dorsal view conical, gradually narrowed apically, surface convex, distinctly punctured; width 1.0 mm; dorsal interocular distance
0.50–0.58 mm
, head width/dorsal interocular distance ratio 1.65–1.73, ventral interocular distance
0.38–0.40 mm
, head width/ventral interocular distance ratio 2.38–2.53. Eye globular; bordered dorsally with short supraocular stria at basal 1/3 of eye; projected laterally, with large black facets and short, inconspicuous interfacetal setae. Frons with short, dark, subcuticular suture on each side, approximately 1/4 width of frons in length, extending obliquely to lateral margin above and anterior to antennal insertion. Antennal length about 3/4 pronotal width, and slightly longer than head width, antennomere relative lengths from base to end approximately 13:11:13:10:10:10:10:10:15:15:18; antennomere I (scape) fairly large, slightly elongate, antennomere II slightly smaller than III; IV–VIII small, width equals length; club fairly large, IX–XI similar in length, XI globular. Clypeus truncate anteriorly, anterior margin with long setae; densely punctate; somewhat emarginate, with narrow margin. Maxillary palp palpomeres II, III slightly longer than wide; IV elongate oval, apex densely papillate; relative lengths of II–IV approximately 4:3:7. Labium with mentum pentagonal with carina forming triangular plate projecting medially, with distinct lateral pockets; labial palpomere III elongate-oval.
Mentum
and submentum with moderate punctation and setation, setae short. Gular area smooth, without setae or punctation, except near suture with submentum where a shallow depression present with setose punctures.
Thorax
with pronotum transverse in dorsal view, with marginal beads on all sides; length/width ratio 0.70– 0.73, convex, nearly parallel-sided; anterior angles projecting, weakly angulate; lateral carinae nearly straight, with thin bead, bead bearing row of setose punctures; posterior angles sharp, nearly 90o; posterior margin projecting medially; with narrow, short longitudinal furrow posterolaterally, beginning at pore on posterior margin, extending forward and ending abruptly, length of furrows relative to pronotal length 0.16–0.18. Prosternum with anterior margin slightly emarginate, finely denticulate with fringe of long, anteriorly directed setae; posterior prosternal process truncate. Hypomeron with coarse punctures laterally, medially without longitudinal striations. Scutellar shield transverse, posterior margin projected, pentagonal. Elytra elongate nearly parallel sided, convex; length/ width 3.40–3.63, greatest width near midlength; with marginal bead basally, scutellary striole with 8–10 punctures; intervals of striae with distinct punctures. All elytral punctures bearing a single short seta; seta length less than interpuncture distance. Punctation on meso- and metaventrite distinct. Metaventrite long, convex laterally, slightly impressed medially, metathoracic discrimen extending slightly over half metaventrite length. Legs narrow, similar in length; femora compressed laterally; tibiae shorter than femora, weakly dilated to narrow apex. Protibia not dilated at apex, with fine setal fringe on ventral, lateral margin smooth without stout spinules. Meso- and metatibia narrow, similar to protibia.
Abdomen
with 5 ventrites bearing fine punctures; anterior margin with intercoxal process narrow, with triangular point anteromedially, lateral edges slightly projected, lateral and posterior margins arcuate, converging posteriorly; anterior and posterior margins of ventrites more or less straight; ventrite I lacking subcoxal line, slightly longer medially than II; I–IV each with pair short hairs located adjacent to midline (often abraded); II–IV subequal in length; V slightly longer than IV with lateral margins converging posteriorly to a rounded apex bearing row of short appressed, densely arranged setae.
Male genitalia
(tegmen and median lobe of aedeagus) twisted approximately 45o toward the left side of animal and resting on side. Tegmen sclerotized, triangular, gently twisted; with anterior region ring-like, posterior region sheath-like, posterior margin slightly arcuate; lateral margins gradually converging posteriorly; dorsally with 2 large, elongate, somewhat coniform parameres. Parameres with long setae apically; length/width ratio 2.5 0. Aedeagus with median lobe short, slender, highly sclerotized, apex long and acuminate. Ratio of median lobe length to penile strut length 2:9.
Female
not notably different externally from male
paratype
.
Type
locality.
Tienmuschan, N.W.
China
.
Range.
China.
The region
cited in the label of the
holotype
, N.W.
China
, would correspond in modern
China
to arid
Xinjiang
Province
and may be an error.
The
type
locality,
Tienmuschan
, most closely corresponds with
Tienmushan
,
Zhejiang Province
in coastal eastern
China
, which borders the northern boundary of
Fujian Province
, the other known locality of this species.
Material
examined.
Holotype
female with the following labels (
Fig. 9
D): 1) [rectangular; white; printed in black ink] “
Tienmuschan, N.W.
China
Rtt.”; 2) [rectangular; red, printed and hand written in black ink] “Holo-
TYPUS
discimaculata
M.”; 3) [rectangular; white; hand written in black ink] “
Pharaxanota
[sic] discimaculata Mad.
”.
Deposited
in
NHMB
(examined)
.
Paratype
male with the following labels: 1) [rectangular; white; printed in black ink, with black border] “
Tienmuschan, N.W.
China
Rtt.”; 2) [rectangular; pink, printed and hand written in black ink] “Para- COTYPUS
discimaculata
M.” (
NHMB
, examined).
Others examined
:
CHINA
:
Fujian
Prov.,
Wuyishan City
, Guadun Vill.;
27o 44'N
,
117 o 33'E
,
1200–1500m
;
25-V-2012
,
PENG
& DAI leg. (2). Deposited in
SNUC
,
FSCA
.
Remarks.
Two species of
Cycas
are native to
Fujian Province
,
China
(
Ye 1999
;
Liu & Qin 2004
), one of the known localities for this beetle. Author W. Tang recently visited Wuyishan in
Fujian
, one of the collection localities and found
Cycas
cultivated in that city.