No abstract

Thousands of species of ambrosia beetles excavate tunnels in wood to farm fungi. They maintain associations with particular lineages of fungi, but the phylogenetic extent and mechanisms of fidelity are unknown. We test the hypothesis that selectivity of their mycangium enforces fidelity at coarse phylogenetic scales, while permitting promiscuity among closely related fungal mutualists. We confirm a single evolutionary origin of the Xylosandrus complex—a group of several xyleborine genera that farm fungi in the genus Ambrosiella . Multi-level co-phylogenetic analysis revealed frequent symbiont switching within major Ambrosiella clades, but not between clades. The loss of the mycangium in Diuncus , a genus of evolutionary cheaters, was commensurate with the loss of fidelity to fungal clades, supporting the hypothesis that the mycangium reinforces fidelity. Finally, in vivo experiments tracked symbiotic compatibility throughout the symbiotic life cycle of Xylosandrus compactus and demonstrated that closely related Ambrosiella symbionts are interchangeable, but the probability of fungal uptake in the mycangium was significantly lower in more phylogenetically distant species of symbionts. Symbiont loads in experimental subjects were similar to wild-caught beetles. We conclude that partner choice in ambrosia beetles is achieved in the mycangium, and co-phylogenetic inferences can be used to predict the likelihood of specific symbiont switches.

No abstract

No abstract

Hypothesis -Hydrogen-bonding capacities of polar nonaqueous media significantly affect selfassembly behaviours of surfactants in these media.Introduction -Glycerol, a nonaqueous hydrogen-bonding solvent, is widely used in industrial formulations due to its desirable physical properties. Surfactants are ubiquitous in such applications; however, surfactant self-assembly in glycerol is not well understood.Methods -The microscopic structure of the gel phase was studied using a series of imaging techniques: polarised light microscopy (PLM), confocal laser scanning microscopy (CLSM), and environmental scanning electron microscopy (ESEM). The rheological properties of the gel were studied using viscometry and oscillation rheology measurements. Further nanostructural characterisation was carried out using small-angle neutron scattering (SANS).Results -We have observed the unexpected formation of a microfibrillar gel in SDS and glycerol mixtures at a critical gelation concentration (CGC) as low as ~ 2 wt%; such SDS gelation has not been observed in aqueous systems. The microscopic structure of the gel consisted of microfibres some mm in length and with an average diameter of D ~ 0.5 μm. The fibres in the gel phase exhibited shear-induced alignment in the viscometry measurements, and oscillation tests showed that the gel was viscoelastic, with an elastic-dominated behaviour. Fitting to SANS profiles showed lamellar nano-structures in the gel microfibres at room temperature, transforming into cylindrical-micellar solutions above a critical gelation temperature, T CG ~ 45 o C.Conclusions -These unprecedented observations highlight the markedly different selfassembly behaviours in aqueous and nonaqueous H-bonding solvents, which is not currently well understood. Deciphering such self-assembly behaviour is key to furthering our understanding of self-assembly on a fundamental level.

No abstract

One of the main threats to forests in the Anthropocene are novel or altered interactions among trees, insects and fungi. To critically assess the contemporary research on bark beetles, their associated fungi, and their relationships with trees, the international Bark Beetle Mycobiome research coordination network has been formed. The network comprises 22 researchers from 17 institutions. This forward-looking review summarizes the group’s assessment of the current status of the bark beetle mycobiome research field and priorities for its advancement. Priorities include data mobility and standards, the adoption of new technologies for the study of these symbioses, reconciliation of conflicting paradigms, and practices for robust inference of symbiosis and tree epidemiology. The Net work proposes contemporary communication strategies to interact with the global community of researchers studying symbioses and natural resource managers. We conclude with a call to the broader scientific community to participate in the network and contribute their perspectives.

Cryphalini Lindemann, 1877 are a speciose group of mostly miniscule beetles. The tribe Cryphalini is reviewed here which resulted in taxonomic and nomenclatural changes. This revision follows a recent molecular phylogenomic re-analysis focused on the tribe and related scolytine taxa. The analysis demonstrated that the tribe is polyphyletic, as found in other molecular phylogenies. To ensure monophyletic classification, we present a revision of the former tribe with two tribes resurrected, one described, and several genera transferred to other existing tribes. Additionally, extensive generic synonymy, and new combinations are presented. A key, photographs, and illustrations are provided to enable an accurate determination of genera. The revised Cryphalini contains only CryphalusErichson, 1836 (=Hypocryphalus Hopkins, 1915 syn. nov.; Margadillius Hopkins, 1915 syn. nov.). Coriacephilini Johnson trib. nov. contains only Coriacephilus Schedl, 1939. Ernoporini Nüsslin, 1911 stat. res. contains EidophelusEichhoff, 1876 (=Scolytogenes Eichhoff, 1878 syn. nov.; PtilopodiusHopkins, 1915syn. nov.; ErnoporicusBerger, 1917syn. nov.; CryphalogenesWood, 1980syn. nov.); ErnoporusThomson, 1859 (=ErnocladiusWood, 1980syn. nov.; AllothenemusBright and Torres, 2006syn. nov.); Hemicryphalus Schedl, 1963; and ProcryphalusHopkins, 1915. Trypophloeini Nüsslin, 1911 stat. res. includes the genera Afrocosmoderes Johnson and Jordal gen. nov.; AtomothenemusBright, 2019; Cosmoderes Eichhoff, 1878 (=AllernoporusKurentsov, 1941syn. nov.); HypothenemusWestwood, 1834 (=PeriocryphalusWood, 1971syn. nov.); MacrocryphalusNobuchi, 1981stat. res.; Microcosmoderes Johnson and Jordal gen. nov.; MicrosomusBright, 2019; PygmaeoborusBright, 2019; and TrypophloeusFairmaire, 1864. Xyloterini LeConte, 1876 is maintained, containing Indocryphalus Eggers, 1939; TrypodendronStephens, 1830 and XyloterinusSwaine, 1918. AcorthylusBrèthes, 1922, CryptocarenusEggers, 1937, Neocryphus Nunberg, 1956, Stegomerus Wood, 1967, and TrypolepisBright, 2019 are transferred to Corthylini LeConte, 1876. Stephanopodius Schedl, 1963 is transferred to Xyloctonini Eichhoff, 1878. As a consequence of generic synonymy, the following new or resurrected combinations are proposed: Cosmoderes euonymi (Kurentsov, 1941) comb. nov.; Cryphalus aciculatus (Schedl, 1939) comb. nov.; Cryphalus afiamalus (Schedl, 1951) comb. nov.; Cryphalus angustior Eggers, 1927 comb. res.; Cryphalus asper (Broun, 1881) comb. nov.; Cryphalus bakeri (Eggers, 1927) comb. nov.; Cryphalus basihirtusBeeson, 1929comb. nov.; Cryphalus bidentatus (Browne, 1980) comb. nov.; Cryphalus brevior (Schedl, 1943) comb. nov.; Cryphalus carinatus (Browne, 1980) comb. nov.; Cryphalus confusus (Hopkins, 1915) comb. nov.; Cryphalus corpulentus (Schedl, 1942) comb. nov.; Cryphalus cylindripennis (Schedl, 1959) comb. nov.; Cryphalus cylindrus (Browne, 1950) comb. nov.; Cryphalus densepilosus (Schedl, 1942) comb. nov.; Cryphalus dilutus Eichhoff, 1878 comb. res.; Cryphalus discrepans (Schedl, 1965) comb. nov.; Cryphalus discretus Eichhoff, 1878 comb. res.; Cryphalus erythrinae (Hopkins, 1915) comb. nov.; Cryphalus fici (Browne, 1986) comb. nov.; Cryphalus glabratus (Schedl, 1959) comb. nov.; Cryphalus granulatus (Schedl, 1942) comb. nov.; Cryphalus imitans (Schedl, 1951) comb. nov.; Cryphalus interponens (Schedl, 1953) comb. nov.; Cryphalus kalambanganus (Schedl, 1943) comb. nov.; Cryphalus laevis (Browne, 1980) comb. nov.; Cryphalus laticollis (Browne, 1974) comb. nov.; Cryphalus longipennis (Browne, 1970) comb. nov.; Cryphalus longipilis (Browne, 1981) comb. nov.; Cryphalus magnus (Browne, 1984) comb. nov.; Cryphalus malayensis (Schedl, 1942) comb. nov.; Cryphalus mangiferaeStebbing, 1914comb. res.; Cryphalus margadilaonis (Hopkins, 1915) comb. nov.; Cryphalus mindoroensis (Schedl, 1943) comb. nov.; Cryphalus minor (Schedl, 1943) comb. nov.; Cryphalus minutus (Hopkins, 1915) comb. nov.; Cryphalus mollis Schedl, 1955 comb. res.; Cryphalus moorei (Schedl, 1964) comb. nov.; Cryphalus nigrosetosus (Schedl, 1948) comb. nov.; Cryphalus nitidicollis (Schedl, 1975) comb. nov.; Cryphalus obscurus (Hopkins, 1915) comb. nov.; Cryphalus ovalicollis (Schedl, 1942) comb. nov.; Cryphalus papuanus (Schedl, 1973) comb. nov.; Cryphalus piliger (Schedl, 1975) comb. nov.; Cryphalus polynesiae (Schedl, 1979) comb. nov.; Cryphalus quadrituberculatus (Schedl, 1963) comb. nov.; Cryphalus reflexus (Browne, 1980) comb. nov.; Cryphalus robustus Eichhoff, 1872 comb. res.; Cryphalus rotundus (Hopkins, 1915) comb. nov.; Cryphalus sandakanensis Schedl, 1937 comb. res.; Cryphalus spathulatus (Schedl, 1938) comb. nov.; Cryphalus striatulus (Browne, 1978) comb. nov.; Cryphalus striatus (Hopkins, 1915) comb. nov.; Cryphalus sumatranus (Schedl, 1939) comb. nov.; Cryphalus triangularis (Schedl, 1975) comb. nov.; Cryphalus tutuilaensis (Schedl, 1951) comb. nov.; Eidophelus absonus (Schedl, 1975) comb. nov.; Eidophelus afer (Schedl, 1970) comb. nov.; Eidophelus africanus (Schedl, 1977) comb. nov.; Eidophelus aitutakii (Beaver and Maddison, 1990) comb. nov.; Eidophelus alniphagus (Nobuchi, 1975) comb. nov.; Eidophelus alternans (Schedl, 1975) comb. nov.; Eidophelus amanicus (Eggers, 1919) comb. nov.; Eidophelus ankius (Schedl, 1979) comb. nov.; Eidophelus apicalis (Schedl, 1971) comb. nov.; Eidophelus approximatus (Schedl, 1975) comb. nov.; Eidophelus aspericollis (Eichhoff, 1878) comb. nov.; Eidophelus ater (Eggers, 1923) comb. nov.; Eidophelus australis (Schedl, 1942) comb. nov.; Eidophelus badius (Nobuchi, 1975) comb. nov.; Eidophelus bambusae (Browne, 1983) comb. nov.; Eidophelus bangensis (Eggers, 1927) comb. nov.; Eidophelus basilaris (Wood, 1960) comb. nov.; Eidophelus birosimensis (Murayama, 1958) comb. nov.; Eidophelus braderi (Browne, 1965) comb. nov.; Eidophelus brimblecombei (Schedl, 1972) comb. nov.; Eidophelus buruensis (Eggers, 1926) comb. nov.; Eidophelus camelliae (Nobuchi, 1975) comb. nov.; Eidophelus candidus (Nobuchi, 1975) comb. nov.; Eidophelus capucinus (Schedl, 1971) comb. nov.; Eidophelus caucasicus (Lindemann, 1877) comb. nov.; Eidophelus ceylonicus (Schedl, 1959) comb. nov.; Eidophelus cicatricosus (Schedl, 1942) comb. nov.; Eidophelus coccotrypanoides (Schedl, 1939) comb. nov.; Eidophelus communis (Schaufuss, 1891) comb. nov.; Eidophelus confragosus (Sampson, 1914) comb. nov.; Eidophelus corni (Kurentsov, 1941) comb. nov.; Eidophelus corpulentus (Schedl, 1965) comb. nov.; Eidophelus corrugatus (Schedl, 1950) comb. nov.; Eidophelus creber (Schedl, 1975) comb. nov.; Eidophelus crenatus (Sampson, 1914) comb. nov.; Eidophelus cylindricus (Schedl, 1959) comb. nov.; Eidophelus darwini (Eichhoff, 1878) comb. nov.; Eidophelus devius (Schedl, 1975) comb. nov.; Eidophelus dubiosus (Wood, 1960) comb. nov.; Eidophelus eggersi (Schedl, 1962) comb. nov.; Eidophelus euphorbiae (Wood, 1980) comb. nov.; Eidophelus excellens (Schedl, 1979) comb. nov.; Eidophelus exiguus (Wood, 1980) comb. nov.; Eidophelus exilis (Yin, 2001) comb. nov.; Eidophelus eximius (Schedl, 1942) comb. nov.; Eidophelus expers (Blandford, 1894) comb. nov.; Eidophelus fagi (Fabricius, 1798) comb. nov.; Eidophelus fijianus (Schedl, 1950) comb. nov.; Eidophelus formosanus (Browne, 1981) comb. nov.; Eidophelus fugax (Schedl, 1975) comb. nov.; Eidophelus fujisanus (Nobuchi, 1975) comb. nov.; Eidophelus fulgens (Schedl, 1975) comb. nov.; Eidophelus fulgidus (Schedl, 1975) comb. nov.; Eidophelus fulvipennis (Nobuchi, 1975) comb. nov.; Eidophelus ghanaensis (Schedl, 1977) comb. nov.; Eidophelus glabratus (Yin, 2001) comb. nov.; Eidophelus gracilis (Schedl, 1950) comb. nov.; Eidophelus granulatus (Wood, 1960) comb. nov.; Eidophelus grobleri (Schedl, 1962) comb. nov.; Eidophelus hirtus (Wood, 1974) comb. nov.; Eidophelus hobohmi (Schedl, 1955) comb. nov.; Eidophelus hylesinopsis (Schedl, 1975) comb. nov.; Eidophelus incultus (Yin, 2001) comb. nov.; Eidophelus indicus (Wood, 1989) comb. nov.; Eidophelus insularis (Nobuchi, 1975) comb. nov.; Eidophelus insularum (Krivolutskaya, 1968) comb. nov.; Eidophelus jalappae (Letzner, 1849) comb. nov.; Eidophelus javanus (Schedl, 1942) comb. nov.; Eidophelus kanawhae (Hopkins, 1915) comb. nov.; Eidophelus landolphiae (Schedl, 1961) comb. nov.; Eidophelus leprosulus (Browne, 1974) comb. nov.; Eidophelus longipennis (Eggers, 1936) comb. nov.; Eidophelus magnocularis (Yin, 2001) comb. nov.; Eidophelus marquesanus (Beeson, 1935) comb. nov.; Eidophelus mauritianus (Schedl, 1965) comb. nov.; Eidophelus micans (Eggers, 1927) comb. nov.; Eidophelus minor (Eggers, 1927) comb. nov.; Eidophelus minutissimus (Schedl, 1943) comb. nov.; Eidophelus mus (Schedl, 1975) comb. nov.; Eidophelus nanulus (Wood, 1960) comb. nov.; Eidophelus nigellatus (Schedl, 1950) comb. nov.; Eidophelus nubilus (Wood, 1960) comb. nov.; Eidophelus ocularis (Schedl, 1965) comb. nov.; Eidophelus onyanganus (Schedl, 1941) comb. nov.; Eidophelus opacus (Schedl, 1959) comb. nov.; Eidophelus pacificus (Schedl, 1941) comb. nov.; Eidophelus papuanus (Schedl, 1974) comb. nov.; Eidophelus papuensis (Wood, 1989) comb. nov.; Eidophelus paradoxus (Wood, 1992) comb. nov.; Eidophelus parvus (Hopkins, 1915) comb. nov.; Eidophelus pityophthorinus (Schedl, 1943) comb. nov.; Eidophelus pleiocarpae (Schedl, 1957) comb. nov.; Eidophelus polisquamosus (Yin, 2001) comb. nov.; Eidophelus praeda (Browne, 1978) comb. nov.; Eidophelus puerarae (Choo and Woo, 1989) comb. nov.; Eidophelus pumilionides (Schedl, 1977) comb. nov.; Eidophelus pumilus (Wood, 1960) comb. nov.; Eidophelus punctatulus (Nobuchi, 1976) comb. nov.; Eidophelus punctatus (Schedl, 1951) comb. nov.; Eidophelus puncticollis (Schedl, 1950) comb. nov.; Eidophelus pygmaeolus (Schedl, 1971) comb. nov.; Eidophelus quadridens (Browne, 1983) comb. nov.; Eidophelus ramosus (Beeson, 1935) comb. nov.; Eidophelus robustus (Schedl, 1955) comb. nov.; Eidophelus rugosus (Schedl, 1943) comb. nov.; Eidophelus rusticus (Wood, 1974) comb. nov.; Eidophelus semenovi (Kurentsov, 1941) comb. nov.; Eidophelus separandus (Schedl, 1965) comb. nov.; Eidophelus setifer (Wood, 1974) comb. nov.; Eidophelus sodalis (Schedl, 1965) comb. nov.; Eidophelus spessivtzevi (Berger, 1917) comb. nov.; Eidophelus spirostachius (Schedl, 1958) comb. nov.; Eidophelus splendens (Schedl, 1975) comb. nov.; Eidophelus squamatilis (Schedl, 1977) comb. nov.; Eidophelus squamosus (Schedl, 1942) comb. nov.; Eidophelus squamulosus (Eggers, 1936) comb. nov.; Eidophelus stephegynis (Hopkins, 1915) comb. nov.; Eidophelus takahashii (Nobuchi, 1975) comb. nov.; Eidophelus tarawai (Beaver, 1990) comb. nov.; Eidophelus tonsus (Schedl, 1969) comb. nov.; Eidophelus tricolor (Lea, 1910) comb. nov.; Eidophelus trucis (Wood, 1974) comb. nov.; Eidophelus uncatus (Schedl, 1971) comb. nov.; Eidophelus usagaricus (Eggers, 1922) comb. nov.; Eidophelus varius (Schedl, 1975) comb. nov.; Eidophelus venustus (Schedl, 1953) comb. nov.; Eidophelus yunnanensis (Yin, 2001) comb. nov.; Eidophelus zachvatkini (Krivolutskaya, 1958) comb. nov.; Ernoporus corpulentus (Sampson, 1919) comb. nov.; Ernoporus exquisitus (Bright, 2019) comb. nov.; Ernoporus guiboutiae (Schedl, 1957) comb. nov.; Ernoporus minutus (Bright and Torres, 2006) comb. nov.; Hypothenemus attenuatus (Eggers, 1935) comb. nov.; Hypothenemus loranthus (Schedl, 1942) comb. nov.; Hypothenemus novateutonicus (Schedl, 1951) comb. nov.; Hypothenemus pullus (Wood, 1971) comb. nov. Following assessment of diagnostic characters, the following species were transferred to a different genus: Afrocosmoderes madagascariensis Schedl, 1961 comb. nov.; Afrocosmoderes caplandicus (Schedl, 1965) comb. nov.; Afrocosmoderes grobleri (Schedl, 1961) comb. nov.; Afrocosmoderes niger (Schedl, 1961) comb. nov.; Afrocosmoderes pellitus (Schedl, 1953) comb. nov.; Afrocosmoderes pennatus (Schedl, 1953) comb. nov.; Eidophelus concentralis (Schedl, 1975) comb. nov.; Eidophelus inermis (Browne, 1984) comb. nov.; Eidophelus insignis (Browne, 1984) comb. nov.; Eidophelus kinabaluensis (Bright, 1992) comb. nov.; Eidophelus philippinensis (Schedl, 1967) comb. nov.; Eidophelus podocarpi (Bright, 1992) comb. nov.; Ernoporus imitatrix (Schedl, 1977) comb. nov.; Ernoporus minor (Schedl, 1942) comb. nov.; Ernoporus parvulus (Eggers, 1943) comb. nov.; Indocryphalus sericeus (Schedl, 1942) comb. nov.; Macrocryphalus elongatus (Schedl, 1965) comb. nov.; Macrocryphalus punctipennis (Schedl, 1965) comb. nov.; Microcosmoderes shoreae (Schedl, 1953) comb. nov.; Stegomerus parvatis (Wood, 1974) comb. nov.; Stephanopodius dubiosus (Schedl, 1970) comb. nov. Twenty-nine secondary homonyms were created following genus synonymy, and are designated replacement names: Afrocosmoderes schedli Johnson nom. nov. (=Euptilius madagascariensis Schedl, 1963 syn. nov.); Cryphalus amplicollis Johnson nom. nov. (=Cryphalus laticollis Browne, 1984 syn. nov.); Cryphalus eggersi Johnson nom. nov. (=Cryphalus confusus Eggers, 1927 syn. nov.); Cryphalus fuscus Johnson nom. nov. (=Cryphalus cylindrus Browne, 1984 syn. nov.); Cryphalus gracilis Johnson nom. nov. (=Cryphalus laevis Browne, 1984 syn. nov.); Cryphalus luteus Johnson nom. nov. (=Margadillius fulvus Browne, 1984 syn. nov.); Cryphalus minusculus Johnson nom. nov. (=Hypocryphalus minutus Browne, 1980 syn. nov.); Cryphalus ozopemoides Johnson nom. nov. (=Hypocryphalus montanusSchedl, 1974syn. nov.); Cryphalus pellicius Johnson nom. nov. (=Hypocryphalus pilifer Schedl, 1979 syn. nov.); Cryphalus punctistriatulus Johnson nom. nov. (=Cryphalus striatulusBrowne, 1981syn. nov.); Cryphalus schedli Johnson nom. nov. (=Hypocryphalus formosanus Schedl, 1952 syn. nov.); Cryphalus solomonensis Johnson nom. nov. (=Margadillius terminaliae Browne, 1984 syn. nov.); Cryphalus spissepilosus Johnson nom. nov. (=Cryphalus densepilosusSchedl, 1943syn. nov.); Cryphalus storckiellae Johnson nom. nov. (=Cryphalus striatusBrowne, 1974syn. nov.); Cryphalus takahashii Johnson nom. nov. (=Euptilius exiguus Browne, 1984 syn. nov.); Eidophelus alstoniae Johnson nom. nov. (=Chiloxylon sumatranus Schedl, 1970 syn. nov.); Eidophelus brighti Johnson nom. nov. (=Hemicryphalus minutusBright, 1992syn. nov.); Eidophelus brownei Johnson nom. nov. (=Euptilius papuanus Browne, 1983 syn. nov.); Eidophelus furvus Johnson nom. nov. (=Cryphalophilus ater Schedl, 1972 syn. nov.); Eidophelus levis Johnson nom. nov. (=Eidophelus gracilis Browne, 1984 syn. nov.); Eidophelus lucidus Johnson nom. nov. (=Lepicerinus pacificus Schedl, 1959 syn. nov.); Eidophelus minusculus Johnson nom. nov. (=Eidophelus minutissimus Schedl, 1962 syn. nov.); Eidophelus niger Johnson nom. nov. (=Ernoporicus aterNobuchi, 1975syn. nov.); Eidophelus parvulus Johnson nom. nov. (=Cryphalus parvus Browne, 1984 syn. nov.); Eidophelus rhododendri Johnson nom. nov. (=Hemicryphalus squamosusBright, 1992syn. nov.); Eidophelus schedli Johnson nom. nov. (=Cryphalomorphus ceylonicus Schedl, 1959 syn. nov.); Eidophelus yinae Johnson nom. nov. (=Scolytogenes venustusYin, 2001syn. nov.); Hypothenemus marginatus Johnson nom. nov. (=Periocryphalus sobrinus Wood, 1974 syn. nov.); Hypothenemus squamosulus Johnson nom. nov. (=Ptilopodius squamosus Schedl, 1953 syn. nov.). Two replacement names are now unnecessary: Cryphalus striatulus (Browne, 1978) stat. res. (=Hypothenemus browneiBeaver, 1991syn. nov.); Macrocryphalus oblongusNobuchi, 1981stat. res. (=Hypothenemus nobuchiiKnížek, 2011syn. nov.). We also acknowledge the original description of several species by Eichhoff, 1878a which have been widely referenced as a later description (Eichhoff, 1878b). The following taxonomic changes are provided to acknowledge the changes: Cryphalus horridusEichhoff, 1878a (=Cryphalus horridusEichhoff, 1878bsyn. nov); Cryphalus numidicusEichhoff, 1878a (=Cryphalus numidicusEichhoff, 1878bsyn. nov); Cryphalus submuricatusEichhoff, 1878a (=Cryphalus submuricatusEichhoff, 1878bsyn. nov); Eidophelus aspericollis (Eichhoff, 1878a) (=Eidophelus aspericollisEichhoff, 1878bsyn. nov); Hypothenemus arundinis (Eichhoff, 1878a) (=Hypothenemus arundinisEichhoff, 1878bsyn. nov); Hypothenemus birmanus (Eichhoff, 1878a) (=Hypothenemus birmanusEichhoff, 1878bsyn. nov); Hypothenemus fuscicollis (Eichhoff, 1878a) (=Hypothenemus fuscicollisEichhoff, 1878bsyn. nov); Hypothenemus rotundicollis (Eichhoff, 1878a) (=Hypothenemus rotundicollisEichhoff, 1878bsyn. nov). Subjective species-level changes are minimal. The following synonymies are proposed: Cryphalus papuanus (Schedl, 1973) (=Ernoporus antennariusSchedl, 1974syn. nov.); Eidophelus concentralis (Schedl, 1975) (=Margadillius concentralis Schedl, 1975 syn. nov.). A neotype for Periocryphalus sobrinus Wood, 1974 and its replacement name Hypothenemus marginatusnom. nov. is designated at USNM due to the holotype being lost and replaced with a different species.