Dematochroma

Dematochroma is a genus of leaf beetles in the subfamily Eumolpinae.[3] It is mostly distributed in New Caledonia, though it is also found on Lord Howe Island, Norfolk Island and Timor.[4] Adult beetles (usually less than 1 cm long) are often found at night feeding on leaves,[5] and the larvae eat roots.[6][4]

Dematochroma
Dematochroma norfolkiana
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Infraorder: Cucujiformia
Family: Chrysomelidae
Subfamily: Eumolpinae
Tribe: Eumolpini
Genus: Dematochroma
Baly, 1864[1]
Type species
Dematochroma picea[2]
Baly, 1864

Phylogeny

Recent phylogenetic analyses of Eumolpinae of the south Pacific suggest that Dematochroma is paraphyletic: the type species, the Lord Howe endemic D. picea, is placed in a clade including New Caledonian endemic genera Taophila and Tricholapita, which is sister to another clade including other New Caledonian Eumolpinae genera, the New Caledonian species of Dematochroma as well as the New Zealand endemic Atrichatus. Because of these findings, Gómez-Zurita and Pàmies-Harder (2022) preferred to transfer the New Caledonian species of Dematochroma to other genera.[7] For instance, the genus Thasycles Chapuis, 1874, which was for a long time treated as a synonym of Dematochroma, was reinstated as a valid genus,[7] and a new genus Dematotrichus was established for Dematochroma pilosa and closely related species.[8]

Species
  • Dematochroma antipodum (Fauvel, 1862) – New Caledonia
  • Dematochroma antipodumoides Jolivet, Verma & Mille, 2010
  • Dematochroma culminicola (Heller, 1916) – New Caledonia
  • Dematochroma difficilis (Heller, 1916) – New Caledonia
  • Dematochroma doiana Jolivet, Verma & Mille, 2007 – New Caledonia
  • Dematochroma helleri Jolivet, Verma & Mille, 2007 – New Caledonia
  • Dematochroma howensis Jolivet, Verma & Mille, 2006[4] – Lord Howe Island
  • Dematochroma humboldtiana (Heller, 1916) – New Caledonia
  • Dematochroma lepros (Heller, 1916) – New Caledonia
  • Dematochroma maculifrons (Heller, 1916) – New Caledonia
  • Dematochroma norfolkiana Jolivet, Verma & Mille, 2006[4] – Norfolk Island
  • Dematochroma picea Baly, 1864[1] – Lord Howe Island
  • Dematochroma samuelsoni Jolivet, Verma & Mille, 2011[9] – New Caledonia
  • Dematochroma shuteae Jolivet, Verma & Mille, 2006[4] – Norfolk Island
  • Dematochroma soldatii Jolivet, Verma & Mille, 2010
  • Dematochroma sylviae Jolivet, Verma & Mille, 2010 – New Caledonia
  • Dematochroma terastiomerus (Heller, 1916) – New Caledonia
  • Dematochroma terminaliae Jolivet, Verma & Mille, 2010 – New Caledonia
  • Dematochroma theryi Jolivet, Verma & Mille, 2010 – New Caledonia
  • Dematochroma thyiana Jolivet, Verma & Mille, 2008[10] – New Caledonia
  • Dematochroma timorense Jacoby, 1894[11] – Timor

The following species are synonyms:

  • Dematochroma poyensis Jolivet, Verma & Mille, 2010: synonym of Dematochroma theryi Jolivet, Verma & Mille, 2010[3]

The following species have been transferred to other genera:

  • Dematochroma cancellata (Samuelson, 2010):[12][13] transferred to Dumbea, as synonym of Dumbea striata Jolivet, Verma & Mille, 2007[3]
  • Dematochroma foaensis Jolivet, Verma & Mille, 2007: transferred to Rhyparida[14]
  • Dematochroma fusca Jolivet, Verma & Mille, 2007: transferred to Thasycles[7]
  • Dematochroma laboulbenei (Montrouzier, 1861): transferred to Thasycles[7]
  • Dematochroma panieensis Jolivet, Verma & Mille, 2007:[15] transferred to Thasycles[7]
  • Dematochroma pilosa Jolivet, Verma & Mille, 2007: transferred to Dematotrichus[8]

References
  1. Baly, J. S. (1864). Descriptions of new genera and species of Phytophaga. Stationer's Hall: J.S. Baly.
  2. Reid, Chris A. M.; Shaw, Josh Jenkins; Jensen, Arn R. (2018). "The Australian Museum Lord Howe Island Expedition 2017—Coleoptera" (PDF). Technical Reports of the Australian Museum Online. 26: 53–67. doi:10.3853/j.1835-4211.26.2018.1706.
  3. Platania, L.; Gómez-Zurita, J. (2023). "Current knowledge on the diversity of Eumolpinae (Coleoptera, Chrysomelidae) in New Caledonia". ZooKeys (1177, Research on Chrysomelidae 9): 41–55. doi:10.3897/zookeys.1177.101293.
  4. Jolivet, P.; Verma, K.K.; Mille, C. (2006). "New species of Dematochroma from Lord Howe and Norfolk Islands (Coleoptera, Chrysomelidae, Eumolpinae)". Nouvelle Revue d'Entomologie. Nouvelle Série. 23 (4): 327–332.
  5. Morgan-Richards, M. (April 27, 2020). "Notes from a small Island – in the Pacific". Phoenix Lab - Evolutionary Ecology and Genetics. Archived from the original on 2020-05-27.
  6. Gómez-Zurita, J. (2017). "Taxonomic notes on New Caledonian Dematochroma samuelsoni Jolivet, Verma et Mille and D. difficilis (Heller) (Coleoptera, Chrysomelidae: Eumolpinae)" (PDF). Folia Entomologica Hungarica. 78: 77–82. doi:10.17112/FoliaEntHung.2017.78.77.
  7. Gómez-Zurita, J.; Pàmies-Harder, M. (2022). "Phylogenetic restitution and taxonomic revision of the New Caledonian endemic genus Thasycles Chapuis (Coleoptera: Chrysomelidae, Eumolpinae)". Zoologischer Anzeiger. 297: 16–41. doi:10.1016/j.jcz.2022.01.003.
  8. Gómez-Zurita, J. (2022). "Integrative systematic revision of a new genus of Eumolpinae (Coleoptera: Chrysomelidae) endemic to New Caledonia: Dematotrichus gen. nov. and its numerous new hairy species". Systematics and Biodiversity. 20 (1): 1–28. doi:10.1080/14772000.2022.2084471.
  9. Jolivet, P.; Verma, K.K.; Mille, C. (2011). "New Eumolpinae from Mont Panié, New Caledonia (Coleoptera, Chrysomelidae)". Nouvelle Revue d'Entomologie. Nouvelle Série. 26 (4): 333–340.
  10. Jolivet, P.; Verma, K.K.; Mille, C. (2008). "New species of Dematochroma and Colaspoides from New Caledonia (Coleoptera, Chrysomelidae, Eumolpinae)". Nouvelle Revue d'Entomologie. Nouvelle Série. 24 (3): 195–200. ISSN 0374-9797.
  11. Jacoby, M. (1894). "Descriptions of new genera and species of phytophagous Coleoptera obtained by W. Doherty in the Malayan Archipelago". Novitates Zoologicae. 1: 267–330. doi:10.5962/bhl.part.24565.
  12. Samuelson, G. A. (2010). "Review of Taophila, a genus endemic to New Caledonia (Coleoptera : Chrysomelidae : Eumolpinae)" (PDF). Zootaxa. 2621: 45–62. doi:10.11646/zootaxa.2621.1.3.
  13. Gómez-Zurita, J.; Cardoso, A. (2014) [Published online 7 October 2013]. "Systematics of the New Caledonian endemic genus Taophila Heller (Coleoptera: Chrysomelidae, Eumolpinae) combining morphological, molecular and ecological data, with description of two new species". Systematic Entomology. 39 (1): 111–126. doi:10.1111/syen.12038. hdl:10261/115700. S2CID 86311766.
  14. Gómez-Zurita, J. (2011). "Rhyparida foaensis (Jolivet, Verma & Mille, 2007), comb. n. (Coleoptera, Chrysomelidae) and implications for the colonization of New Caledonia". ZooKeys (157): 33–44. doi:10.3897/zookeys.157.1320. PMC 3253641. PMID 22303102.
  15. Jolivet, P.; Verma, K.K.; Mille, C. (2007). "New Genera and Species of Eumolpinae from New Caledonia (Coleoptera, Chrysomelidae)" (PDF). Revue Française d'Entomologie. Nouvelle Série. 29 (2–3): 77–92.


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