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Shaverdo H, Balke M. A species-group key and notes on phylogeny and character evolution in New Guinean Exocelina Broun, 1886 diving beetles (Coleoptera, Dytiscidae, Copelatinae). Zookeys 2022; 1131:31-58. [PMID: 36761459 PMCID: PMC9836653 DOI: 10.3897/zookeys.1131.94205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 10/27/2022] [Indexed: 11/23/2022] Open
Abstract
Detailed information about the known species groups of Exocelina Broun, 1886 from New Guinea is presented, including species numbers, distribution, and references of species-group diagnoses, keys to the species, and species descriptions. An identification key to all species groups is provided. Phylogeny and morphological character evolution are discussed.
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Affiliation(s)
- Helena Shaverdo
- Naturhistorisches Museum, Burgring 7, A-1010 Vienna, AustriaNaturhistorisches MuseumViennaAustria
| | - Michael Balke
- SNSB-Zoologische Staatssammlung München, Münchhausenstraße 21, D-81247 Munich, GermanySNSB-Zoologische Staatssammlung MünchenMunichGermany
- GeoBioCenter, Ludwig-Maximilians-University, Munich, GermanyLudwig-Maximilians-UniversityMunichGermany
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Toussaint EFA, White LT, Shaverdo H, Lam A, Surbakti S, Panjaitan R, Sumoked B, von Rintelen T, Sagata K, Balke M. New Guinean orogenic dynamics and biota evolution revealed using a custom geospatial analysis pipeline. BMC Ecol Evol 2021; 21:51. [PMID: 33823805 PMCID: PMC8022562 DOI: 10.1186/s12862-021-01764-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 02/09/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The New Guinean archipelago has been shaped by millions of years of plate tectonic activity combined with long-term fluctuations in climate and sea level. These processes combined with New Guinea's location at the tectonic junction between the Australian and Pacific plates are inherently linked to the evolution of its rich endemic biota. With the advent of molecular phylogenetics and an increasing amount of geological data, the field of New Guinean biogeography begins to be reinvigorated. RESULTS We inferred a comprehensive dated molecular phylogeny of endemic diving beetles to test historical hypotheses pertaining to the evolution of the New Guinean biota. We used geospatial analysis techniques to compare our phylogenetic results with a newly developed geological terrane map of New Guinea as well as the altitudinal and geographic range of species ( https://arcg.is/189zmz ). Our divergence time estimations indicate a crown age (early diversification) for New Guinea Exocelina beetles in the mid-Miocene ca. 17 Ma, when the New Guinean orogeny was at an early stage. Geographic and geological ancestral state reconstructions suggest an origin of Exocelina ancestors on the eastern part of the New Guinean central range on basement rocks (with a shared affinity with the Australian Plate). Our results do not support the hypothesis of ancestors migrating to the northern margin of the Australian Plate from Pacific terranes that incrementally accreted to New Guinea over time. However, our analyses support to some extent a scenario in which Exocelina ancestors would have been able to colonize back and forth between the amalgamated Australian and Pacific terranes from the Miocene onwards. Our reconstructions also do not support an origin on ultramafic or ophiolite rocks that have been colonized much later in the evolution of the radiation. Macroevolutionary analyses do not support the hypothesis of heterogeneous diversification rates throughout the evolution of this radiation, suggesting instead a continuous slowdown in speciation. CONCLUSIONS Overall, our geospatial analysis approach to investigate the links between the location and evolution of New Guinea's biota with the underlying geology sheds a new light on the patterns and processes of lineage diversification in this exceedingly diverse region of the planet.
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Affiliation(s)
| | - Lloyd T White
- GeoQuEST Research Centre, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Helena Shaverdo
- Naturhistorisches Museum Wien, Burgring 7, 1010, Vienna, Austria
| | - Athena Lam
- SNSB-Zoologische Staatssammlung München, Munich, Germany
- Department of Environmental Science, Policy and Management, University of California, Berkeley, CA, USA
- Institute for Biodiversity Science and Sustainability, California Academy of Sciences, San Francisco, CA, USA
| | - Suriani Surbakti
- Department of Biology, Universitas Cenderawasih (UNCEN), Waena, Papua, Indonesia
| | - Rawati Panjaitan
- Department of Biology, Faculty of Sciences and Mathematics, State University of Papua (UNIPA), Jalan Gunung Salju Amban, Manokwari, 98314, West Papua, Indonesia
| | - Bob Sumoked
- Walian 2, Tomohon Selatan, 95439, N Sulawesi, Indonesia
| | - Thomas von Rintelen
- Museum Für Naturkunde - Leibniz Institute for Evolution and Biodiversity Science, Invalidenstraße 43, 10115, Berlin, Germany
| | - Katayo Sagata
- University of Papua New Guinea, Port Moresby, Papua New Guinea
| | - Michael Balke
- SNSB-Zoologische Staatssammlung München, Munich, Germany.
- Department of Entomology, SNSB-Zoologische Staatssammlung München, Münchhausenstrasse 21, 81247, Munich, Germany.
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Sasakawa K, Mitsuduka Y, Itô H. Unexpected Species Identities and Interspecific Relationships in a Subterranean Beetle Lineage, the Pterostichus macrogenys Species Group (Coleoptera, Carabidae), Revealed by Fine-Scale Field Sampling and Detailed Morphological Comparisons. INSECTS 2020; 11:insects11110803. [PMID: 33202529 PMCID: PMC7698068 DOI: 10.3390/insects11110803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/08/2020] [Accepted: 11/12/2020] [Indexed: 11/16/2022]
Abstract
An endemic subterranean Japanese carabid beetle lineage, the Pterostichus macrogenys species group, was recently revealed to have marked regional differentiation. Studies of such features reveal insect species diversity and provide insight into the mechanisms driving species diversity. We examined specimens of this species group collected from the southern Tohoku District of Honshu, Japan, where its diversity has not yet been fully elucidated, using fine-scale field sampling and detailed comparative morphological analysis of male genitalia. In total, 103 specimens from 13 localities were classified into one new (P. monolineatus sp. n.) and eight known species. In four of the known species, we observed disjunct distributions, which have not previously been reported in this species group and may be more common than previously recognized. Species coexistence was observed at four sites, with two species of different body sizes coexisting at three sites and three species coexisting at the remaining site. The three coexisting species included one large and two small species, the latter of which have male genitalia of a different size. This newly discovered coexistence pattern implies separate effects of differential body and genital size in species coexistence, which has rarely been reported in insects.
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Affiliation(s)
- Kôji Sasakawa
- Laboratory of Zoology, Department of Science Education, Faculty of Education, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan
- Correspondence:
| | | | - Hirotarô Itô
- 1-14-16 Awayama, Niigata-shi, Niigata 950-0843, Japan;
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Shaverdo H, Surbakti S, Sumoked B, Balke M. Two new species of the Exocelina ekari group from New Guinea with strongly modified male antennae (Coleoptera, Dytiscidae, Copelatinae). Zookeys 2020; 960:63-78. [PMID: 32884398 PMCID: PMC7445195 DOI: 10.3897/zookeys.960.55007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 07/06/2020] [Indexed: 11/12/2022] Open
Abstract
Two new species of the genus Exocelina Broun, 1886: E. athesphatos sp. nov. and E. tsinga sp. nov. are described from New Guinea and placed into the E. ekari group based on the structure of their male genitalia. The two species are very similar with respect to their external morphology and characterised by almost identical, strongly modified male antennae. However, they can easily be separated by the shape and setation of the median lobe and paramere. Based on morphological similarity and results of a molecular phylogenetic analysis, we suggest these are sister species. Both of them have been collected on the southern slopes of the Central Range (the spine of New Guinea), with a distance of ca. 380 km straight line between the collecting localities.
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Affiliation(s)
- Helena Shaverdo
- Naturhistorisches Museum Wien, Burgring 7, 1010 Vienna, AustriaNaturhistorisches MuseumViennaAustria
| | - Suriani Surbakti
- Department of Biology, Universitas Cendrawasih, Waena, Papua, IndonesiaUniversitas CendrawasihWaenaIndonesia
| | - Bob Sumoked
- Walian 2, Tomohon Selatan, N Sulawesi 95439, IndonesiaUnaffiliatedTomohonIndonesia
| | - Michael Balke
- SNSB-Zoologische Staatssammlung München, Münchhausenstraße 21, D-81247 Munich, Germany and GeoBioCenter, Ludwig-Maximilians-University, Munich, GermanySNSB-Zoologische Staatssammlung MünchenMunichGermany
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