Reassembling a lost lowland carabid beetle assemblage (Coleoptera) from Kauai, Hawaiian Islands

Liebherr, James K. and Porch, Nick 2015, Reassembling a lost lowland carabid beetle assemblage (Coleoptera) from Kauai, Hawaiian Islands, Invertebrate systematics, vol. 29, no. 2, pp. 191-213.

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Title Reassembling a lost lowland carabid beetle assemblage (Coleoptera) from Kauai, Hawaiian Islands
Author(s) Liebherr, James K.
Porch, NickORCID iD for Porch, Nick
Journal name Invertebrate systematics
Volume number 29
Issue number 2
Start page 191
End page 213
Total pages 23
Publisher CSIRO Publishing
Place of publication Melbourne, Vic.
Publication date 2015
ISSN 1445-5226
Keyword(s) adaptive radiation
insect extinction
phylogenetic analysis
Polynesian colonisation
Summary A late Holocene but prehistoric carabid beetle fauna from the lowland Makauwahi Cave, Kauai, is characterised. Seven extinct species - Blackburnia burneyi, B. cryptipes, B. godzilla, B. menehune, B. mothra, B. ovata and B. rugosa, spp. nov. (tribe Platynini) - represent the first Hawaiian insect species to be newly described from subfossil specimens. Four extant Blackburnia spp. - B. aterrima (Sharp), B. bryophila Liebherr, B. pavida (Sharp), and B. posticata (Sharp) - and three extant species of tribe Bembidiini - Bembidion ignicola Blackburn, B. pacificum Sharp and Tachys oahuensis Blackburn - are also represented. All subfossil fragments are disarticulated, with physical dimensions and cladistic analysis used to associate the major somites - head, prothorax and elytra - for description of the new species. The seven new Makauwahi Cave species support recognition of a lowland area of endemism adjoining Haupu, a low-stature 700m elevation ridgeline in southern Kauai. Four of the extinct Blackburnia are adelphotaxa to extant species currently found at higher elevations in Kauai. Addition of these lowland specialists to the phylogenetic hypothesis undercuts applicability of the taxon cycle for interpreting evolutionary history of these taxa. Two of the extinct species are Kauai representatives in clades that subsequently colonised younger Hawaiian Islands, enhancing support for the progressive biogeographic colonisation of the archipelago by this lineage. And three of the extinct Blackburnia species comprised larger beetles than those of any extant Kauai Blackburnia, consistent with the evolution of island gigantism in the lowland habitats of Kauai.
Language eng
Field of Research 060206 Palaeoecology
Socio Economic Objective 960803 Documentation of Undescribed Flora and Fauna
HERDC Research category C1 Refereed article in a scholarly journal
Grant ID ARC DE130101453
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