Eggersanthus sublaevis
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Eggersanthus sublaevis lateral; S.M. Smith |
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Eggersanthus sublaevis dorsal; S.M. Smith |
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Eggersanthus sublaevis declivity; S.M. Smith |
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Eggersanthus sublaevis frontal; S.M. Smith
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Taxonomic history
Webbia sublaevis Eggers, 1927b: 104.
Xyleboricus sublaevis (Eggers): Schedl 1936c: 64.
Arixyleborus sublaevis (Eggers): Schedl 1952d: 162.
Eggersanthus sublaevis (Eggers): Sittichaya and Smith 2020: 283.
Diagnosis
2.05–2.2 mm long and 2.73–2.9 times as long as wide (n = 4). Like the genus this species is distinguished by the following combination of characters: pronotumpronotum:
the dorsal surface of the thorax
in dorsaldorsal:
of or relating to the upper surface; opposite of ventral
view rectangular (type a in Hulcr et al. 2007Hulcr et al. 2007:
Hulcr J, Dole SA, Beaver RA, Cognato AI. 2007. Cladistic review of generic taxonomic characters in Xyleborini (Coleoptera: Curculionidae: Scolytinae). Systematic Entomology 32: 568-584. https://doi.org/10.1111/j.1365-3113.2007.00386.x), anterioranterior:
the front or forward; opposite of posterior margin weakly concaveconcave:
appearing hollowed out
, without a median row of serrationsserration:
row of asperities; a saw-like structure 
, corners sharply quadratequadrate:
square-like in shape
, anterolateralanterolateral:
relating to the anterior and lateral parts of the side part/portion
corners asperateasperate:
covered in asperities with 4–5 serrationsserration:
row of asperities; a saw-like structure forming a 90° angle; pronotumpronotum:
the dorsal surface of the thorax
in laterallateral:
pertaining to the side
view with discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
longer than anterioranterior:
the front or forward; opposite of posterior slope (type 7 in Hulcr et al. 2007Hulcr et al. 2007:
Hulcr J, Dole SA, Beaver RA, Cognato AI. 2007. Cladistic review of generic taxonomic characters in Xyleborini (Coleoptera: Curculionidae: Scolytinae). Systematic Entomology 32: 568-584. https://doi.org/10.1111/j.1365-3113.2007.00386.x); antennalantennal:
pertaining to the antennae
funicle 4-segmented, clubclub:
the broadened, flattened end of antenna, in Xyleborini comprised of three segments
obliquely truncatetruncate:
appearing cut off or suddenly shortened
type 2 (Hulcr et al. 2007Hulcr et al. 2007:
Hulcr J, Dole SA, Beaver RA, Cognato AI. 2007. Cladistic review of generic taxonomic characters in Xyleborini (Coleoptera: Curculionidae: Scolytinae). Systematic Entomology 32: 568-584. https://doi.org/10.1111/j.1365-3113.2007.00386.x), approximately circular, as long as wide, segment 1 corneouscorneous:
horn-like; applied to antennal club
, nearly encircling anterioranterior:
the front or forward; opposite of posterior face, segment 2 pubescent, visible on anterioranterior:
the front or forward; opposite of posterior face only; elytralelytral:
pertaining to the elytra
declivitydeclivity:
downward slope of either the pronotum or elytra
with granulategranulate:
pertaining to a coarse, grainy surface texture
striae and interstriae; protibiaeprotibia:
tibia of the first pair of legs
very slender, distinctly triangular, posteriorposterior:
toward the rear end; opposite of anterior
face flat and unarmed; scutellumscutellum:
a shield-like sclerotized plate located at the midpoint of the elytral base
large, triangular, clearly visible from dorsaldorsal:
of or relating to the upper surface; opposite of ventral
view; elytraelytron:
the two sclerotized forewings of beetles that protect and cover the flight wings
attenuateattenuate:
gradually tapering apically
; and no mycangial tufts present.
May be confused with
Distribution
Philippines, Thailand
Host plants
unknown (Sittichaya and Smith 2020Sittichaya and Smith 2020:
Sittichaya W, Smith SM. 2020. Eggersanthus Sittichaya and Smith gen. nov., a new Oriental ambrosia beetle genus (Coleoptera: Curculionidae: Scolytinae: Xyleborini). Zootaxa 4779: 282-288. http://dx.doi.org/10.11646/zootaxa.4779.2.9)
