Sueus niisimai

Sueus niisimai
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Cucujiformia
Family:	Curculionidae
Genus:	Sueus
Species:	S. niisimai
Binomial name
Sueus niisimai (Eggers, 1926)
Synonyms
Hyorrhynchus niisimaiEggers, 1926 Hyorrhynchus pilosusEggers, 1936 Sphaerotrypes controversaeMurayama, 1950 [1] Sueus sphaerotrypoidesMurayama, 1951

Sueus niisimai is a species of weevil ^[2] in the subfamily Scolytinae. ^{[3] [4]}

Distribution

Sueus niisimai is widely distributed in South, Southerast, and East Asia. It is also found in Australia and Fiji, presumably introduced. ^[5] However, a recent study suggests that the southern records represent Sueus pilosus and that Sueus niisimai is more northerly species found from northern Vietnam and China east to Taiwan, Japan, and Korea. ^[4]

Description

Body length excluding head is about 1.6 to 2.0 mm. Body elongate is oval and slightly flattened. Body reddish brown. Antennae and tarsi yellowish brown. Compound eyes divided into two parts where the upper ones are located almost on frons and lower ones are located behind scrobe ventrally. Pronotum wider than long, shiny with minute shallow punctures. Pronotum clothed with whitish hairy pubescence. Scutellum shiny, small and triangular. Elytra long, parallel-sided, and slightly flattened. ^[6]

Biology

A polyphagous weevil, the host plants of the adults are mainly broaden leaves trees such as orange, Commersonia bartramia , Cryptocarya constricta and Macaranga . Females generally constructs galleries in old dry twigs. ^[7] This gallery system consists of a radial gallery, and usually two longitudinal branches running up and down the stem. Eggs are laid in separate niches, where the larvae develop by feeding on the ambrosia fungus growing in the parental gallery. Usually, only one or two males are produced in each gallery with majority of females. Males are smaller than the females, where they mate with their sisters in the parental gallery. ^[5]

The Canker disease fungus Diatrypella japonica is identified as a symbiote associated with the adult weevils. ^[8]

References

1. Wood, Stephen L. (1992). "Nomenclatural Changes and New Species in Platypodidae and Scolytidae (Coleoptera), Part II". The Great Basin Naturalist. 52 (1): 78–88 [85]. JSTOR   41712699 . Retrieved 2021-09-03.
2. "Sueus niisimai Wood & Bright, 1992 [sic]". Catalogue of Life . Species 2000: Leiden, the Netherlands. Retrieved 29 September 2025.
3. "Sueus niisimai (Eggers, 1926)". BioLib.cz. Retrieved 29 September 2025.
4. Cognato, Anthony I.; Smith, Sarah M.; Schiffer, Matthew; Li, You (2024). "A taxonomic review of Sueus Murayama, 1951 ambrosia beetles (Coleoptera: Curculionidae: Scolytinae: Hyorrhynchini) aided by molecular phylogenetic analyses". Zootaxa. 5477 (4): 475–493 [487]. doi:10.11646/zootaxa.5477.4.5.
5. Beaver, R. A.; Sittichaya, W.; Liu, L-Y. (2014-10-21). "A synopsis of the scolytine ambrosia beetles of Thailand (Coleoptera: Curculionidae: Scolytinae)". Zootaxa. 3875: 1–82 [15]. doi:10.11646/zootaxa.3875.1.1. PMID   25544343.
6. Sangwook Park; Jong Chul Jung; Taeman Han (2017). "A New Species and Five Newly Recorded Species of Scolytinae (Coleoptera: Curculionidae) from Korea". Entomological Research Bulletin. 33 (2): 131–137. Retrieved 2021-09-02.
7. Beaver, R. A. (1984-01-13). "The biology of the ambrosia beetle, Sueus niisimai (Eggers) (Col., Scolytidae), in Fiji". Entomologist's Monthly Magazine. 120 (1440–1443): 99–102. Retrieved 2021-09-03.
8. Li, You; Skelton, James; Adams, Sawyer; Hattori, Yukako; Smith, Matthew E.; Hulcr, Jiri (2020-06-16). "The ambrosia beetle Sueus niisimai (Scolytinae: Hyorrhynchini) is associated with the Canker Disease Fungus Diatrypella japonica (Xylariales)" . Plant Disease. 104 (12): 3143–3150. doi: 10.1094/PDIS-03-20-0482-RE . PMID   33136520 . Retrieved 2021-09-03.