Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The three larval instars of Megadytes (Paramegadytes) glaucus (Brullé, 1838) and the third-instar larvae of M. (Bifurcitus) magnus Trémouilles & Bachmann, 1980 and M. (Trifurcitus) robustus (Aubé, 1838) are described and illustrated for the first time, with particular emphasis on the morphometry and chaetotaxy. A key to the subgenera of Megadytes Sharp, 1882 is presented. In a cladistic analysis of third-instar larval characters, Megadytes is resolved as non-monophyletic; the species of Cybistrini studied, except those included in the subgenus Trifurcitus Brinck, 1945, share three synapomorphies: (i) medial projection of frontoclypeus truncate apically, with many apical setae directed forwards; (ii) lateral projections of frontoclypeus project forwards, not flattened; and (iii) median process of prementum rounded apically. The clade composed of the subgenera Megadytes s. str., Paramegadytes Trémouilles & Bachmann, 1980 and Bifurcitus Brinck, 1945 along with Cybister lateralimarginalis (De Geer, 1774) is well supported by three synapomorphies: (i) head capsule subrectangular and (ii) distal third of mandible more strongly projected inwards, (iii) with a ring of long, hair-like setae. The two species of the subgenus Paramegadytes have bilobed lateral projections on the frontoclypeus. Megadytes (M.) marginithorax (Perty, 1830) is characterized by the very narrow notches between the medial and lateral projections of frontoclypeus. No synapomorphies were discovered to group together the two species of the subgenus Bifurcitus.

Registro:

Documento: Artículo
Título:Descriptions of larvae of Megadytes (Coleoptera: Dytiscidae: Dytiscinae): The hypothesis of monophyletic origin revisited
Autor:Michat, M.C.
Filiación:Laboratorio de Entomología, Departamento de Biodiversidad y Biología Experimental, Universidad de Buenos Aires, Av. Int. Güiraldes s/n, 1428 Buenos Aires, Argentina
Palabras clave:Chaetotaxy; Coleoptera; Dytiscidae; Larval morphology; Megadytes; Phylogeny; cladistics; larva; morphometry; phylogeny; Coleoptera; Cybister lateralimarginalis; Cybistrini; Dytiscidae; Dytiscinae; Glaucus; Megadytes
Año:2006
Volumen:103
Número:4
Página de inicio:831
Página de fin:842
DOI: http://dx.doi.org/10.14411/eje.2006.114
Título revista:European Journal of Entomology
Título revista abreviado:Eur. J. Entomol.
ISSN:12105759
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_12105759_v103_n4_p831_Michat

Referencias:

  • Alarie, Y., 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 (1995) Can. Entomol., 127, pp. 913-943
  • Alarie, Y., Phylogenetic relationships of Nearctic Colymbetinae (Coleoptera: Adephaga: Dytiscidae) based on chaetotaxic and porotaxic analysis of head capsule and appendages of larvae (1998) Can. Entomol., 130, pp. 803-824
  • Alarie, Y., Archangelsky, M., Nilsson, A.N., Watts, C.H.S., Larval morphology of the genus Lancetes (Coleoptera: Adephaga: Dytiscidae): The hypothesis of sister-group relationship with the subfamily Dytiscinae revisited (2002) Can. Entomol., 134, pp. 467-501
  • Bertrand, H., Notes sur quelques larves de coléoptères aquatiques (1934) Ann. Soc. Entomol. Fr., 103, pp. 363-382
  • Cekalovic Kuschevich, T., Descripción de la larva de Megadytes australis (Germain), 1854 (Coleoptera, Dytiscidae) (1974) Bol. Soc. Biol. Concep., 48, pp. 33-40
  • Crespo, F.A., Megadytes (Paramegadytes) glaucus (Brullé), descripción del tercer estadio larval y de la pupa (Dytiscidae, Coleoptera) (1982) Physis (B), 41, pp. 7-13
  • De Marzo, L., Studi sulle larve dei coleotteri ditiscidi. X. Anatomia e funzionamento dell'aparato succhinate cibariofaringeo in alcune forme larvali delle subff. Dytiscinae, Colymbetinae, Laccophilinae e Hydroporinae (1979) Entomologica (Bari), 15, pp. 5-72
  • De Marzo, L., Nilsson, A.N., Morphological variation and fine structure of some head structures in larvae of Dytiscidae (Coleoptera) (1986) Entomol. Basil., 11, pp. 29-42
  • Ferreira Jr., N., Descricáo da larva de Megadytes giganteus (Castelnau, 1834) com notas biológicas (Coleoptera: Dytiscidae) (1993) Revta. Bras. Entomol., 37 (1), pp. 57-60
  • Ferreira Jr., N., Description of the larvae of Megadytes fallax (Aubé) and M. marginithorax (Perty) (Coleoptera: Dytiscidae) (1995) Coleopt. Bull., 49, pp. 313-318
  • Fiori, G., Contributi alla conoscenza morfologica ed etologica dei coleotteri III. Le larve dell'Acilius sulcatus L. e del Cybister lateralimarginalis De Geer (Dytiscidae) (1949) Boll. Ist. Entomol. Univ. Bologna, 17, pp. 234-264
  • Goloboff, P., Farris, J., Nixon, K., T.N.T.: Tree analysis using new technology (2003), http://www.zmuc.dk/public/phylogeny, Program and documentation, available from the authors, and at; Lawrence, J.F., Order Coleoptera (1991) Immature Insects, 2, pp. 144-658. , In Stehr F.W. (ed.): Kendall/Hunt, Iowa
  • Michat, M.C., Torres, P.L.M., Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis (2005) Aquat. Insects, 27, pp. 281-292
  • Michat, M.C., Torres, P.L.M., Hydaticus tuyuensis Trémouilles (Coleoptera: Dytiscidae): Larval morphology and phylogenetic relationships within Dytiscinae (2006) Hydrobiologia, 563, pp. 479-492
  • Michat, M.C., Archangelsky, M., Torres, P.L.M., Descriptions of the preimaginal stages of Lancetes marginatus (Steinheil) and L. biremis Říha (Coleoptera: Dytiscidae), and comparative notes with other Lancetes larvae (2005) Stud. Neotr. Faun. Env., 40, pp. 129-142
  • Miller, K.B., Cladistic analysis of the tribes of Dytiscinae and the phylogenetic position of the genus Notaticus Zimmermann (Coleoptera: Dytiscidae) (2000) Insect Syst. Evol., 31, pp. 165-177
  • Miller, K.B., On the phylogeny of the Dytiscidae (Insecta: Coleoptera) with emphasis on the morphology of the female reproductive system (2001) Insect Syst. Evol., 32, pp. 45-92
  • Miller, K.B., Revision of the genus Eretes Laporte, 1833 (Coleoptera: Dytiscidae) (2002) Aquat. Insects, 24, pp. 247-272
  • Miller, K.B., Bergsten, J., Whiting, M., Phylogeny and classification of diving beetles in the tribe Cybistrini (Coleoptara, Dytiscidae, Dytiscinae) Zool. Scripta, , (in press)
  • Nilsson, A.N., A review of primary setae and pores on legs of larval Dytiscidae (Coleoptera) (1988) Can. J. Zool., 66, pp. 2283-2294
  • Nilsson, A.N., (2001) World Catalogue of Insects. Vol. 3. Dyliscidae (Coleoptera), p. 395. , Apollo Books, Steenstrup, Denmark
  • Trémouilles, E.R., Bachmann, A.O., La tribu Cybisterini en la Argentina (Coleoptera, Dytiscidae) (1980) Rev. Soc. Entomol. Arg., 39 (1-2), pp. 101-125
  • Watts, C.H.S., The larvae of Australian Cybister spp. Curt., Homeodytes spp. Reg. and Hyderodes shuckardi Hope (Coleoptera: Dytiscidae) (1964) Trans. R. Soc. S. Aust., 88, pp. 145-156

Citas:

---------- APA ----------
(2006) . Descriptions of larvae of Megadytes (Coleoptera: Dytiscidae: Dytiscinae): The hypothesis of monophyletic origin revisited. European Journal of Entomology, 103(4), 831-842.
http://dx.doi.org/10.14411/eje.2006.114
---------- CHICAGO ----------
Michat, M.C. "Descriptions of larvae of Megadytes (Coleoptera: Dytiscidae: Dytiscinae): The hypothesis of monophyletic origin revisited" . European Journal of Entomology 103, no. 4 (2006) : 831-842.
http://dx.doi.org/10.14411/eje.2006.114
---------- MLA ----------
Michat, M.C. "Descriptions of larvae of Megadytes (Coleoptera: Dytiscidae: Dytiscinae): The hypothesis of monophyletic origin revisited" . European Journal of Entomology, vol. 103, no. 4, 2006, pp. 831-842.
http://dx.doi.org/10.14411/eje.2006.114
---------- VANCOUVER ----------
Michat, M.C. Descriptions of larvae of Megadytes (Coleoptera: Dytiscidae: Dytiscinae): The hypothesis of monophyletic origin revisited. Eur. J. Entomol. 2006;103(4):831-842.
http://dx.doi.org/10.14411/eje.2006.114