Cyclorhipidion fukiense (Eggers)

Hoebeke, E. Richard, Rabaglia, Robert J., Knížek, Miloš & Weaver, John S., 2018, First records of Cyclorhipidion fukiense (Eggers) (Coleoptera: Curculionidae: Scolytinae: Xyleborini), an ambrosia beetle native to Asia, in North America, Zootaxa 4394 (2), pp. 243-250 : 244-248

publication ID

https://doi.org/ 10.11646/zootaxa.4394.2.7

publication LSID

lsid:zoobank.org:pub:CCF78F2C-CD57-4275-97E3-315065A43065

DOI

https://doi.org/10.5281/zenodo.5974414

persistent identifier

https://treatment.plazi.org/id/8D44533E-DB33-6B48-FF56-F938FE3EFD5B

treatment provided by

Plazi

scientific name

Cyclorhipidion fukiense (Eggers)
status

 

Cyclorhipidion fukiense (Eggers)

( Figs. 1 View FIGURE 1 , 3 View FIGURES 2–4 , 6 View FIGURES 5–7 )

Xyleborus fukiensis Eggers, 1941: 225 View in CoL .

Cyclorhipidion fukiensis: Beaver & Liu, 2010: 24 View in CoL .

Cyclorhipidion fukiense: Knížek, 2011: 243 .

Xyleborus ganshoensis Murayama, 1952: 16 View in CoL (Synonymy: Beaver 2011: 284). Xyleborus tenuigraphus Schedl, 1953: 29 (Synonymy: Beaver & Liu 2010: 24).

Diagnosis. Morphometric measurements show consistent diagnostic characters that are reliably and sufficiently distinct to separate C. fukiense from C. bodoanum and C. pelliculosum . Although based on a rather small sample size (6 specimens for C. fukiense and 14 specimens each for C. bodoanum and C. pelliculosum ), the range of body length was reliably different for each species, with no overlap (see Table 1).

Cyclorhipidion fukiense is very similar in general appearance to both C. bodoanum and C. pelliculosum except for body length (compare Fig. 1 View FIGURE 1 ). Cyclorhipidion bodoanum ( Figs. 1 View FIGURE 1 , 2 View FIGURES 2–4 ) can be easily distinguished by its smaller body length (mean = 2.02 mm; range 1.82–2.16 mm) and its much lighter, yellowish-brown pronotum, sometimes contrasting with the slightly darker elytra. Cyclorhipidion pelliculosum ( Figs. 1 View FIGURE 1 , 4 View FIGURES 2–4 ) is significantly larger than fukiense (mean = 3.24 mm; range 3.07–3.36 mm), more uniformly darker in coloration, and the declivity is more impressed ( Fig. 7 View FIGURES 5–7 ) with consistently smaller denticles. Specimens of C. fukiense fall into a size class ( Fig. 1 View FIGURE 1 ) that is intermediate between C. bodoanum and C. pelliculosum . Its mean body length is 2.60 mm with a range of 2.45– 2.76 mm. The pronotum is visibly longer in C. bodoanum with a mean pronotal length/width ratio of 1.20. The pronotum of C. fukiense and C. pelliculosum are less long relative to width, more quadrate, with a mean pronotal length/width ratio of 1.12 ( C. fukiense ) and 1.11 ( C. pelliculosum ).

Redescription. Female: Total length 2.45–2.76 mm, 2.64 times as long as wide (= mean) (see Table 1 for detailed measurements and ratios). Color chestnut brown. Frons reticulate with sparse granules above epistomal margin. Antennal club with sutures and setae near apex, a suture evident near apex on posterior side. Pronotum 1.01–1.10 mm long, 1.12 times as long as wide (= mean), anterior margin rounded, unarmed, disc reticulate, shallowly punctured with abundant short setae. Elytra 1.44–1.51 mm long, 1.48 times as long as wide (= mean); discal striae not impressed, punctures small, about equal in size to interstrial punctures, confused, strial and interstrial punctures with short setae, becoming longer posteriorly. Declivity ( Fig. 6 View FIGURES 5–7 ) flattened, interstriae 1 slightly raised near middle of declivity, 2 slightly impressed, 3 slightly raised, denticles on 1 and 3 larger than others, strial punctures larger than those on elytral disc and subequal to interstrial punctures, confused, short setae abundant with longer setae along posterior margin.

Male: Unknown.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Genus

Cyclorhipidion

Loc

Cyclorhipidion fukiense (Eggers)

Hoebeke, E. Richard, Rabaglia, Robert J., Knížek, Miloš & Weaver, John S. 2018
2018
Loc

Xyleborus fukiensis

Eggers, 1941 : 225
Loc

Cyclorhipidion fukiensis:

Beaver & Liu, 2010 : 24
Loc

Cyclorhipidion fukiense: Knížek, 2011 : 243

Knížek, 2011 : 243
Loc

Xyleborus ganshoensis

Murayama, 1952 : 16
Beaver 2011 : 284
Schedl, 1953 : 29
Beaver & Liu 2010 : 24
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