Larval Chaetotaxy of World Dytiscidae (Coleoptera: Adephaga) and Implications for the Study of Hydradephaga

Alarie, Yves; Michat, Mariano C.

doi:10.1007/978-3-031-01245-7_2

Cited by 8 publications

(6 citation statements)

References 53 publications

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“…Chaetotaxy . Similar to that of the generalized Cybister larva ( Alarie et al 2011 ; Alarie and Michat 2023 ) with the following remarks: lamellae clypeales drill-like (Figs 20 , 21 ); seta PA1–3 apically rounded (Figs 5 , 24 ); seta FR10 broad, bifid (Fig. 5 ); seta MX11 multi-branched (Fig.…”

Section: Resultsmentioning

confidence: 57%

“…Compared to adults, coleopteran larvae lack morphological information ( Hammond et al 2019 ). This trend is also present in Dytiscidae , in which information on larval morphology is generally limited ( Alarie and Michat 2023 ). A nomenclature system of Dytiscidae larval chaetotaxy was developed to provide a detailed description and comparison of their larval morphology and to allow for phylogenetic analysis ( Alarie and Michat 2023 ).…”

Section: Introductionmentioning

confidence: 81%

“…This trend is also present in Dytiscidae , in which information on larval morphology is generally limited ( Alarie and Michat 2023 ). A nomenclature system of Dytiscidae larval chaetotaxy was developed to provide a detailed description and comparison of their larval morphology and to allow for phylogenetic analysis ( Alarie and Michat 2023 ). Particularly, primary sensilla (setae and pores) have been important for the diagnosis and study of phylogenetic relationships among the species ( Michat et al 2017 ).…”

Section: Introductionmentioning

confidence: 81%

“…The methods and terms used in this study were abbreviated following Alarie et al (2011 , 2023 ) and Michat et al (2015 , 2019 ): A and AN , antenna; AB and LAS, abdominal segment VIII (last abdominal segment); CL , longest claw; CO , coxa; COL , coronal line length; FE , femur; FR , frontoclypeus; FRL , frontoclypeus length; HL , head length; HW , maximum head width; L, leg; LA , labium; LP , labial palpi; MN , mandible; MNL , mandible length; MNW , mandible width; MP , maxillary palpi; MX , maxilla; OCW , occipital foramen width; PA , parietal; PPF , maxillary palpifer; PT , pretarsus; TA , tarsus; TI , tibia; TL , total length; TR , trochanter; U and UR , urogomphus. Primary setae and pores were coded following Alarie et al (2011) and Alarie and Michat (2023) .…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Similarly, Watanabe (2024) suggested color of the antennal segments, ratio of each antennal segment and article, and shape of the mandible are helpful for identification in the field. Herein, we describe in detail the morphometric and chaetotaxic characteristics of C. lewisianus larvae for the first time, according to the now generalized system used to describe aquatic Adephaga larvae ( Alarie and Michat 2023 ).…”

Section: Introductionmentioning

confidence: 99%

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Description of the larva of Cybister lewisianus Sharp, 1873 (Coleoptera, Dytiscidae, Cybistrinae)

Watanabe,

Hayashi

2024

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We describe for the first time, the larvae of Cybister (Cybister) lewisianus Sharp, 1873, an endangered species of diving beetle in Japan, emphasizing the chaetotaxy of the cephalic capsule, head appendages, legs, last abdominal segment, and urogomphi. Cybister lewisianus larvae are characterized by a longer third article of antenna 3 than the sum of the first and second articles; rounded apex of parietal setae 1–3; labium seta 8 absent; elongated trochanter seta 4, not multi-branched; rounded apex of abdominal setae 1, 12, and 13 (instar I); narrow lateral projections of the frontoclypeus; pronotum without two dark-brown longitudinal stripes dorsally (instar III); and the base of the thick row of small setae on the inner edge of the mandible angulate and projecting medially (all instars).

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Section: Resultsmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 81%

Section: Materials and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Description of the larva of Cybister lewisianus Sharp, 1873 (Coleoptera, Dytiscidae, Cybistrinae)

Watanabe,

Hayashi

2024

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Morphology of the larvae of Sandracottus femoralis Heller, 1934, and S. mixtus (Blanchard, 1843) and phylogenetic comparison with other known Aciliini (Coleoptera: Dytiscidae, Dytiscinae)

Alarie

Michat

Shaverdo

2023

Zootaxa

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We describe the larvae of the diving-beetle genus Sandracottus Sharp, 1882 based on S. femoralis Heller, 1934 and S. mixtus (Blanchard, 1843). We include detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, terminal abdominal segment and urogomphi in order to discover useful characters for distinguishing Sandracottus larvae from those of other known Aciliini (Coleoptera: Dytiscidae, Dytiscinae). A provisional parsimony analysis based on larval characteristics of seven Aciliini species in four genera (Acilius Leach, 1817, Graphoderus Dejean, 1833, Sandracottus, Thermonectus Dejean, 1833) was conducted using the program TNT. A clade grouping Eretini and Aciliini stands out as the most strongly supported in this analysis. The tribe Aciliini finds itself monophyletic with also very good support. Our analysis, however, failed to depict any clear phylogenetic relationships within the Aciliini although each of the four genera studied emerged from our study as morphologically distinct.

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The very rare Japanese endemic diving beetle Japanolaccophilus niponensis (Kamiya, 1939), (Coleoptera: Dytiscidae, Laccophilinae): larval morphology and phylogenetic comparison with other known Laccophilini

Alarie

Watanabe

Michat

2023

Zootaxa

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The three larval instars of Japanolaccophilus niponensis (Kamiya, 1939) (Coleoptera: Adephaga, Laccophilinae) are described for the first time according to the now genevralized larval descriptive format of Dytiscidae (Coleoptera: Adephaga), which incorporates detailed chaetotaxic and morphometric analyses. A parsimony analysis based on larval characteristics of 14 Laccophilini species in seven genera was conducted using the program TNT. One of the main results is that Japanolaccophilus Satô, 1972, which so far was treated as being related to Neptosternus Sharp, 1882 now stands out as sister to Laccophilus Leach, 1815, and Philodytes J. Balfour-Browne, 1938 with strong support. Additionally, Laccomimus Toledo & Michat, 2015, and Africophilus Guignot, 1948 are resolved as monophyletic and sister to a clade which itself is subdivided into two well supported clades: Neptosternus + Australphilus Watts, 1978, and Japanolaccophilus + (Laccophilus, Philodytes). Philodytes is here newly accepted as junior synonym of Laccophilus.

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Larval Chaetotaxy of World Dytiscidae (Coleoptera: Adephaga) and Implications for the Study of Hydradephaga

Cited by 8 publications

References 53 publications

Description of the larva of Cybister lewisianus Sharp, 1873 (Coleoptera, Dytiscidae, Cybistrinae)

Description of the larva of Cybister lewisianus Sharp, 1873 (Coleoptera, Dytiscidae, Cybistrinae)

Morphology of the larvae of Sandracottus femoralis Heller, 1934, and S. mixtus (Blanchard, 1843) and phylogenetic comparison with other known Aciliini (Coleoptera: Dytiscidae, Dytiscinae)

The very rare Japanese endemic diving beetle Japanolaccophilus niponensis (Kamiya, 1939), (Coleoptera: Dytiscidae, Laccophilinae): larval morphology and phylogenetic comparison with other known Laccophilini

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