Belongs within: Curculionidae.
The Platypodinae, ambrosia beetles, are a group of beetles that bore tunnels in dead wood. The majority of species feed as larvae on symbiotic fungi growing in these tunnels. These fungi often cannot survive outside the association with the beetles, and propagules are carried by the beetles in specialised mycetangia. The Australian species Austroplatypus incompertus is eusocial, forming multi-generational colonies with a single breeding female tended by non-breeding workers (Bouchard 2014). Recent phylogenetic studies have agreed that platypodines occupy a relatively basal position in the true weevil (Curculionidae) radiation, and are not directly related to the other major group of wood-boring weevils in the Scolytinae.
The galea and lacinia are fused on the maxilla in members of the tribe Platypodini but remain distinct in basal species historically included in the Tesserocerini.
<==Platypodinae [Platypodidae, Tesserocerini]
|--Notoplatypus elongatusMPJ18
`--+--+--Chaetastus tuberculatusMPJ18
| `--CenocephalusMPJ18
| |--C. hurdi Schedl 1962P92
| |--C. quadrilobus Schedl 1962 [=Mitosoma quadrilobum]P92
| `--C. succinicaptus Schedl 1962P92
`--+--+--Genyocerus exilisMPJ18
| `--Diapus Chapuis 1865MPJ18
| |--D. capillatus Sampson 1913S13
| |--D. furtivus Sampson 1913S13
| |--D. mirus Sampson 1913S13
| |--D. pusillimus Chapuis 1865MPJ18
| `--D. unispineusGC-P14
`--+--+--TesserocerusMPJ18
| | |--T. ericerusMPJ18
| | `--T. insignisW86
| `--SpathidicerusMPJ18
| |--S. nobilisMPJ18
| `--S. thomsoniR13
`--PlatypodiniB14
| i. s.: Austroplatypus incompertus (Schedl 1968)B14
| Treptoplatypus Schedl 1972A02
| |--T. abietis (Wood 1958)A02
| `--T. wilsoni (Swaine 1916)A02
| Myoplatypus Wood 1993A02
| `--M. flavicornis (Fabricius 1776)A02
| Oxoplatypus Wood 1993A02
| `--O. quadridentatus (Olivier 1795)A02
| Euplatypus Wood 1993A02
| |--E. compositus (Say 1824)A02
| |--E. parallelus (Fabricius 1801)A02
| `--E. pini (Hopkins 1905)A02
|--+--TeloplatypusMPJ18
| `--Triozastus marshalliMPJ18
`--Platypus Herbst 1793MPJ18, M94
|--*P. cylindrusM94 [=Bostrichus cylindrusM94, Hylurgus (Platypus) cylindricusG20, Scolytus cylindricusLC40]
|--P. apertus Chap. 1866FS90
|--P. apicalisM94
|--P. australis Chapuis 1865M94
|--P. biuncusS13
|--P. caliculusB88
|--P. cavicepsM94
|--P. compositusM94
|--P. crenatus Chap. 1866M87
|--P. geminatus Chap. 1866M87
|--P. gracilisM94
|--P. impressusMPJ18
|--P. incompertusLB20
|--P. laevicollis Chap. 1866 [incl. P. testaceus]FS90
|--P. maravignae Guérin 1838P92
|--P. mulsanti Chap. 1866FS90
|--P. parallelus Chapuis 1865M94
|--P. poeyi Guér. 1829FS90
|--P. rectangulatus Sampson 1913S13
|--P. signatusS13
|--P. solidusZ94
|--P. subcostatus Duv. 1857 [incl. P. praeustus]FS90
|--P. subgranosusLB91
|--P. suffodiens Sampson 1913S13
|--P. sulcatusM94
`--P. westwoodiS13
Platypodinae incertae sedis:
Periommatus bispinusW86
ScolytotarsusW86
CrossotarsusM94
|--C. barbatusB88
|--C. kuntzeniB88
`--C. omnivorusLB91
DoliopygusM94
|--D. chapuisiW86
`--D. dubiusM94
Trachyostus aterrimusM94
Megaplatypus mutatusML05
MitosomaP92
|--M. chapuisiR13
`--M. rhinoceroide Schawaller 1981P92
*Type species of generic name indicated
References
[A02] Anderson, R. S. 2002. Curculionidae Latreille 1802. In: Arnett, R. H., Jr, M. C. Thomas, P. E. Skelley & J. H. Frank (eds) American Beetles vol. 2. Polyphaga: Scarabaeoidea through Curculionoidea pp. 722–815. CRC Press.
[B88] Bouček, Z. 1988. Australasian Chalcidoidea (Hymenoptera): A biosystematic revision of genera of fourteen families, with a reclassification of species. CAB International: Wallingford (UK).
[B14] Bouchard, P. (ed.) 2014. The Book of Beetles: A lifesize guide to six hundred of nature’s gems. Ivy Press: Lewes (United Kingdom).
[FS90] Fleutiaux, E., & A. Sallé. 1890. Liste des coléoptères de la Guadeloupe et descriptions d’espèces nouvelles. Annales de la Société Entomologique de France, 6e série 9: 351–484.
[GC-P14] Gillett, C. P. D. T., A. Crampton-Platt, M. J. T. N. Timmermans, B. H. Jordal, B. C. Emerson & A. P. Vogler. 2014. Bulk de novo mitogenome assembly from pooled total DNA elucidates the phylogeny of weevils (Coleoptera: Curculionoidea). Molecular Biology and Evolution 31 (8): 2223–2237.
[G20] Goldfuss, G. A. 1820. Handbuch der Naturgeschichte vol. 3. Handbuch der Zoologie pt 1. Johann Leonhard Schrag: Nürnberg.
[LC40] Laporte de Castelnau, F. 1840. Histoire Naturelle des Insectes Coléoptères vol. 2. P. Duménil: Paris.
[LB91] Lawrence, J. F., & E. B. Britton. 1991. Coleoptera (beetles). In: CSIRO. The Insects of Australia: A textbook for students and research workers 2nd ed. vol. 2 pp. 543–683. Melbourne University Press: Carlton (Victoria).
[LB20] Letsch, H., M. Balke, E. F. A. Toussaint & A. Riedel. 2020. Historical biogeography of the hyperdiverse hidden snout weevils (Coleoptera, Curculionidae, Cryptorhynchinae). Systematic Entomology 45: 312–326.
[ML05] Marvaldi, A. E., & A. A. Lanteri. 2005. Key to higher taxa of South American weevils based on adult characters (Coleoptera, Curculionoidea). Revista Chilena de Historia Natural 78: 65–87.
[M87] Masters, G. 1887. Catalogue of the described Coleoptera of Australia. Part VI. Proceedings of the Linnean Society of New South Wales, series 2, 1 (4): 979–1036.
[M94] May, B. M. 1994. An introduction to the immature stages of Australian Curculionoidea. In: Zimmerman, E. C. Australian Weevils (Coleoptera: Curculionoidea) vol. 2. Brentidae, Eurhynchidae, Apionidae and a chapter on immature stages by Brenda May pp. 365–728. CSIRO Australia.
[MPJ18] Mugu, S., D. Pistone & B. H. Jordal. 2018. New molecular markers resolve the phylogenetic position of the enigmatic wood-boring weevils Platypodinae (Coleoptera: Curculionidae). Arthropod Systematics and Phylogeny 76 (1): 45–58.
[P92] Poinar, G. O., Jr. 1992. Life in Amber. Stanford University Press: Stanford.
[R13] Reuter, O. M. 1913. Lebensgewohnheiten und Instinkte der Insekten bis zum Erwachen der sozialen Instinkte. R. Friedländer & Sohn: Berlin.
[S13] Sampson, W. 1913. Some hitherto-undescribed Ipidae and Platypodidae from India and Burma. Annals and Magazine of Natural History, series 8, 12: 443–452.
[W86] Wood, S. L. 1986. A reclassification of the genera of Scolytidae (Coleoptera). Great Basin Naturalist Memoirs 10: 1–126.
[Z94] Zimmerman, E. C. 1994. Australian Weevils (Coleoptera: Curculionoidea) vol. 2. Brentidae, Eurhynchidae, Apionidae and a chapter on immature stages by Brenda May. CSIRO Australia.