Xylosandrus amputatus

Taxonomic history

Xyleborus amputatus Blandford, 1894c: 575.

Amasa amputatus [sic!] (Blandford): Wood and Bright, 1992: 682.

Xylosandrus amputatus (Blandford): Dole and Cognato, 2010: 473.

Synonyms

Xyleborus melli Schedl, 1938: 463. Beaver, 2010: 55.

Diagnosis

2.8 mm long (mean = 2.8 mm; n = 5); 2.15−2.33 times as long as wide. This species can be distinguished by its moderate size; upper part of eye smaller than lower part; elytralelytral:
'pertaining to the elytra
discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
weakly ascending apically, longer than declivitydeclivity:
downward slope of either the pronotum or elytra
; declivitaldeclivital:
pertaining to the elytral declivity
face steep, abruptly separated from discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
; elytraelytron:
' the two sclerotized forewings of beetles that protect and cover the flight wings
appearing truncatetruncate:
appearing cut off or suddenly shortened
; posterolateralposterolateral:
'relating to end of the side part/portion
margins of elytraelytron:
' the two sclerotized forewings of beetles that protect and cover the flight wings
carinate to suture forming a circumdeclivital ringcircumdeclivital ring:
a costa that completely encircles the elytral declivity
; declivitaldeclivital:
pertaining to the elytral declivity
face flat, coarsely shagreenedshagreened:
covered with a closely-set roughness, like shark skin'
, dull; declivitydeclivity:
downward slope of either the pronotum or elytra
with four punctatepunctate:
'set with fine impressed points, appearing as pin pricks
, glabrousglabrous:
'smooth, devoid of vestiture
, straight striaestria:
punctures in rows, which may or may not be impressed to make grooves
visible; strial punctures large; interstriaeinterstria:
'longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
glabrousglabrous:
'smooth, devoid of vestiture
, punctatepunctate:
'set with fine impressed points, appearing as pin pricks
; posterolateralposterolateral:
'relating to end of the side part/portion
margin smooth, not granulategranulate:
'pertaining to a coarse, grainy surface texture'
; pronotumpronotum:
'the dorsal surface of the thorax
as long as wide, from dorsaldorsal:
'of or relating to the upper surface; opposite of ventral
view rounded (type 1) and laterallateral:
'pertaining to the side
view basic (type 0), summitsummit:
highest point, used for pronotum and elytra, denotes the peak between pronotal frontal slope and disc, and between elytral disc and declivity
at midpoint, basalbase:
point or edge closest to the body; opposite of apex
half shiningshining:
appearing glossy or bright in luster; referring to a surface that is polished and reflects light well
, densely punctatepunctate:
'set with fine impressed points, appearing as pin pricks
; and broad, dense mycangial tuftmycangial tuft:
'tuft of setae that denotes the mycangia exterior opening
on the pronotalpronotal:
'pertaining to the pronotum
basebase:
point or edge closest to the body; opposite of apex
.

May be confused with

Amasa spp., Xylosandrus bellinsulanus, X. mancus, and X. trunculus

Distribution

Cambodia, China (Fujian, Guangdong, Hunan, Shanghai, Sichuan), Japan, South Korea, Taiwan, Vietnam; imported and established in USA (Cognato et al. 2011Cognato et al. 2011:
Cognato AI, Olson RO, Rabaglia RJ. 2011. An Asian ambrosia beetle, Xylosandrus amputatus (Blandford) (Curculionidae: Scolytinae: Xyleborini), discovered in Florida, U.S.A. The Coleopterists Bulletin 65: 43-45. https://doi.org/10.1649/0010-065X-65.1.43, Gomez et al. 2018aGomez et al. 2018a:
Gomez DF, Rabaglia RJ, Fairbanks KEO, Hulcr J. 2018a. North American Xyleborini north of Mexico: a review and key to genera and species (Coleoptera, Curculionidae, Scolytinae). ZooKeys 768: 19-68. https://doi.org/10.3897/zookeys.768.24697)

Host plants

recorded from Acer (Aceraceae), Cinnamomum, Machilus (Lauraceae), Pelargonium (Geraniaceae), and Ziziphus (Rhamnaceae) (Dole and Cognato 2010Dole and Cognato 2010:
Dole SA, Cognato AI, 2010. Revision of Xylosandrus Reitter (Curculionidae: Scolytinae). Proceedings of the California of Science 61: 451-545.)

DNA data

Sequences available for COI and CAD.

COI: MN620057; MN620058; MN620059; MN620060; HQ317870

CAD: MN620325; MN620326; MN620327