Debus pumilus (Eggers) Eggers, 2010

Hulcr, Jiri, 2010, New genera of Palaeotropical Xyleborini (Coleoptera: Curculionidae: Scolytinae) based on congruence between morphological and molecular characters, Zootaxa 2717, pp. 1-33 : 15-16

publication ID

https://doi.org/ 10.5281/zenodo.199742

DOI

https://doi.org/10.5281/zenodo.5621846

persistent identifier

https://treatment.plazi.org/id/474887DD-FFC1-FFA4-90BA-6E5CA0B5FE65

treatment provided by

Plazi

scientific name

Debus pumilus (Eggers)
status

comb. nov.

Debus pumilus (Eggers) , comb. n.

Xyleborus pumilus Eggers (1923) View in CoL

Xyleborus ipidia Schedl (1972a) View in CoL , syn. n.

Xyleborus cylindricus Eggers (1927a) , syn. n. (complete taxonomic history in Wood and Bright, 1992)

Specimens examined. D. pumilus View in CoL : Indonesia, Sumatra (lectotype, USNM); Malaysia, Sabah, Danum Valley (66, Hulcr det., MSUC.); New Guinea, Morobe Province, Bulolo (1, FICB); New Guinea, Gulf Province, Ivimka (1, R. A. Beaver det., UCD); New Guinea, Madang Prov. (960, Hulcr det., MSUC), Oro Prov. (20, Hulcr det., MSUC); West Sepik (370, Hulcr det., MSUC). X. ipidia View in CoL : New Guinea, New Ireland (paratype, FICB), New Guinea, New Ireland (NHMW). X. cylindricus : Philippines, Luzon, Balbalan (lectotype, USNM).

Comments. Placement of D. pumilus in Debus was confirmed by molecular phylogenetic analysis (72% and 74% posterior probability, Cognato et al., 2011). It is one of the smallest and most slender Debus specie s. The declivity is only slightly excavated or entirely flat (which is unusual in Debus ), the apex of elytra is usually flat, or slightly emarginate. Also declivital denticles are smaller than in other Debus (except some D. emarginatus ).

The holotype of X. ipidia is probably lost. Paratypes of X. ipidia and holotype of D. pumilus are essentially identical, except for the declivital spines, which are slightly less produced in D. pumilus . The holotype of X. cylindricus is nearly identical to the holotype of D. pumilus , except that the largest pair of denticles on declivity is slightly displaced towards the edge, making declivity appear slightly excavated. Other variants of the D. pumilus - group exist throughout Pacific islands, differing in details of declivital armature and puncturation (R. A. Beaver, pers, comm.). They are most likely insular deviations of the variable D. pumilus declivity.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Genus

Debus

Loc

Debus pumilus (Eggers)

Hulcr, Jiri 2010
2010
Loc

Xyleborus ipidia

Schedl 1972
1972
Loc

Xyleborus cylindricus

Eggers 1927
1927
Loc

Xyleborus pumilus

Eggers 1923
1923
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