Hostname: page-component-8448b6f56d-sxzjt Total loading time: 0 Render date: 2024-04-24T19:55:28.056Z Has data issue: false hasContentIssue false
  • English
  • Français

Larval morphology of the tribe Matini (Coleoptera: Dytiscidae, Colymbetinae): descriptions of Batrachomatus daemeli, Matus bicarinatus, and Allomatus nannup and phylogenetic relationships

Published online by Cambridge University Press:  31 May 2012

Yves Alarie ,
Chris H.S. Watts  and
Anders N. Nilsson
Yves Alarie*
Affiliation:
Department of Biology, Laurentian University, Ramsey Lake Road, Sudbury, Ontario, Canada P3E 2C6
Chris H.S. Watts
Affiliation:
South Australian Museum, North Terrace, Adelaide, SA 5000, Australia
Anders N. Nilsson
Affiliation:
Department of Ecology and Environmental Science, University of Umeå, S-901 87 Umeå, Sweden
*
1 Author to whom all correspondence should be addressed (E-mail: yalarie@nickel.laurentian.ca).
Get access Rights & Permissions [Opens in a new window]

Abstract

Descriptions are presented of larval instars of three species of the colymbetine tribe Matini Zimmermann (Coleoptera: Dytiscidae), Batrachomatus daemeli (Sharp), Matus bicarinatus (Say), and Allomatus nannup Watts, including a chaetotaxic and porotaxic analysis of the cephalic capsule, head appendages, legs, last abdominal segment, and urogomphi. A parsimony analysis based on 32 informative larval characteristics was conducted with the computer program NONA. Members of the Matini are postulated to share a monophyletic origin based on (i) seta TR2 articulated anteroventroproximally on the trochanter; (ii) seta TR5 elongate on the metatrochanter; (iii) seta TA1 elongate and inserted proximally on the tarsus; (iv) antenomere III with a hole-like ventroapical spinula; (v) prementum with the primary setae LA2, LA3, LA4, LA5, and LA8 spine-like and elongate; (vi) presence of secondary setae on the cephalic appendages; and (vii) presence of additional primary setae on the last abdominal segment. A clade Matini + Colymbetini is postulated based on (i) metafemoral seta FE5; (ii) metafemoral seta FE6; (iii) seta TI6 on tibia, all elongate and hair-like; (iv) one-segmented urogomphus; (v) presence of an occipital suture in first instar; (vi) galea elongate; (vii) presence of natatory setae on legs; and (viii) presence of secondary setae on the urogomphus.

Résumé

Les stades larvaires de trois espèces de la tribu Matini Zimmermann (Colymbetinae), Batrachomatus daemeli (Sharp), Matus bicarinatus (Say) et Allomatus nannup Watts, sont décrits en incluant une analyse chétotaxique et porotaxique détaillée de la capsule et des appendices céphaliques, des pattes, du dernier segment abdominal et des urogomphes. Une analyse par parcimonie de 32 caractères larvaires significatifs fut effectuée à l’aide du logiciel NONA. Il est proposé que les genres de la tribu Matini partagent une origine monophylétique tel que suggérées par (i) la position antéroventroproximale de la soie TR2 sur le trochanter; (ii) la forme allongée de la soie TR5 sur le métatrochanter; (iii) la forme allongée et la position proximale de la soie TA1 sure le tarse; (iv) la présence sur l’antennomère III, en position ventroapicale d’une spinule en forme de pore; (v) la forme allongée et épineuse des soies LA2, LA3, LA4, LA5 et LA8 sur le prémentum; (vi) la présence de soies secondaires sur les appendices céphaliques; et (vii) la présence de soies primaires additionnelles sur le dernier segment abdominal. Un ensemble monophylétique Matini + Colymbetini est également postulé en s’appuyant sur l’apparence allongée et effilée des soies (i) FE5, sur le métafémur; (ii) FE6, sur le métafémur; (iii) TI6, sur le tibia; (iv) par la présence d’un urogomphe non segmenté; (v) par la présence d’une carène occipitale chez la larve de premier stade; (vi) par la galéa allongée; (vii) par la présence de soies natatoires sur les pattes; et (viii) par la présence de soies secondaires sur les urogomphes.

Type
Articles
Information
The Canadian Entomologist , Volume 133 , Issue 2 , April 2001 , pp. 165 - 196
Copyright
Copyright © Entomological Society of Canada 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alarie, Y. 1995. Primary setae and pores on the legs, the last abdominal segment, and the urogomphi of larvae of Nearctic Colymbetinae (Coleoptera: Adephaga: Dytiscidae) with an analysis of their phylogenetic relationships. The Canadian Entomologist 127: 913–43CrossRefGoogle Scholar
Alarie, Y. 1998. Primary setae and pores on the cephalic capsule and head appendages of larvae of Nearctic Colymbetinae (Coleoptera: Adephaga: Dytiscidae) with an analysis of their phylogenetic relationships. The Canadian Entomologist 130: 803–24CrossRefGoogle Scholar
Alarie, Y., Balke, M. 1999. A study of the larva of Carabdytes upin Balke, Hendrich and Wewalka (Coleoptera: Adephaga: Dytiscidae), with comments on the phylogeny of the Colymbetinae. The Coleopterists Bulletin 53: 146–54Google Scholar
Alarie, Y., Harper, P.P. 1989. The larvae of Laccornis Des Gozis 1914 (Coleoptera: Adephaga: Dytiscidae) with description of L. latens (Fall, 1937) and redescription of L. conoideus (LeConte 1850). The Coleopterists Bulletin 43: 365–78Google Scholar
Alarie, Y., Larson, D.J. 1998. Larvae of Agabinus Crotch: generic characteristics, description of A. glabrellus (Motschulsky), and comparison with other genera of the subfamily Colymbetinae (Coleoptera: Adephaga: Dytiscidae). The Coleopterists Bulletin 52: 339–50Google Scholar
Alarie, Y., Spangler, P.J., Perkins, P.D. 1998. Study of the larvae of Hydrotrupes palpalis (Coleoptera: Adephaga: Dytiscidae) with implications for the phylogeny of the Colymbetinae. The Coleopterists Bulletin 52: 313–32Google Scholar
Balfour-Browne, J. 1947. On the false-chelate leg of an aquatic beetle larva. Proceedings of the Royal Entomological Society of London Series A 22: 38–41CrossRefGoogle Scholar
Bertrand, H. 1972. Larves et nymphes des coléoptères aquatiques du globe. Paris: F PaillartGoogle Scholar
Brinck, P. 1948. Coleoptera of Tristan da Cunha. Results of the Norwegian Scientific Expedition to Tristan da Cunha 1937–1938 17Google Scholar
Goloboff, P.A. 1993. NONA. Noname version 1 (a bastard son of Pee-Wee) 32-bit version. Program and documentation. Computer program distributed by JM Carpenter, Department of Entomology, American Museum of Natural History, New YorkGoogle Scholar
Larson, D.J. 1993. Ecology of tropical Australian Hydradephaga (Insecta: Coleoptera). Part I. Natural history and distribution of northern Queensland species. Proceeding of the Royal Society of Queensland 103: 47–63Google Scholar
Mouchamps, R. 1963. Les Matini australiens. Bulletin de la Société entomologique de France 69: 136–41CrossRefGoogle Scholar
Ríha, P. 1959. Die tribus Matini (Coleoptera, Dytiscidae). Acta Entomologica Musei Nationalis Prague 33: 413–8Google Scholar
Spangler, P.J., Gordon, R.D. 1973. Descriptions of the larvae of some predaceous water beetles (Coleoptera: Dytiscidae). Proceedings of the Washington Biological Society 86: 261–78Google Scholar
Watts, C.H.S. 1985. A faunal assessment of Australian Hydradepahaga. Proceedings of the Academy of the Natural Sciences of Philadelphia 137: 22–8Google Scholar
Watts, C.H.S. 1998. Preliminary guide to the identification of adult and larval Dytiscidae and adult aquatic Hydrophilidae (Insecta: Coleoptera). Albury: Cooperative Research Centre for Freshwater EcologyGoogle Scholar
Wolfe, G.W., Roughley, R.E. 1985. Description of the pupa and mature larva of Matus ovatus ovatus Leech (Coleoptera: Dytiscidae) with a chaetotaxal analysis emphasizing mouthparts, legs, and urogomphus. Proceedings of the Academy of the Natural Sciences of Philadelphia 137: 61–79Google Scholar
Young, F.N. 1953. Two new species of Matus, with a key to the known species and subspecies of the genus (Coleoptera: Dytiscidae). Annals of the Entomological Society of America 46: 49–55CrossRefGoogle Scholar