Hydaticus xanthomelas ( Brullé, 1837 )

Megna, Yoandri S., Balke, Michael, Apenborn, Rico & Hendrich, Lars, 2019, A review of Peruvian diving beetles of the genus Hydaticus Leach, 1817, with description of Hydaticus (Prodaticus) panguana sp. nov. and notes on other Neotropical species (Coleoptera: Dytiscidae), Zootaxa 4615 (1), pp. 113-130 : 118-122

publication ID	https://doi.org/10.11646/zootaxa.4615.1.5
publication LSID	lsid:zoobank.org:pub:2A000D68-CA54-4077-AA8C-50B4455E6A23
DOI	https://doi.org/10.5281/zenodo.4330437
persistent identifier	https://treatment.plazi.org/id/0382E754-E760-FFB9-FF22-FAD4FCC6FAB8
treatment provided by	Felipe (2020-08-22 01:14:45, last updated 2024-11-27 03:33:41)
scientific name	Hydaticus xanthomelas ( Brullé, 1837 )
status

Treatment

Hydaticus xanthomelas ( Brullé, 1837) View in CoL

( Figs. 2D View FIGURE 2 , 7 View FIGURES 4–7 )

Dytiscus xanthomelas Brullé, 1837: 47 .

Hydaticus xanthomelas ( Brullé, 1837) View in CoL ; Aubé 1838:181; Trémouilles 1996:18; Benetti & Hamada 2003: 704; Ferreira (Jr.) & Braga 2009: 324; Miller & Bergsten 2014: 74; Miller & Bergsten 2016: 119; Nilsson & Hájek 2019: 97.

Hydaticus rectus Sharp 1882a: 655 ; synonymy by Trémouilles 1996: 18.

Type locality. Argentina, Paraná river , Corrientes .

Material examined. PERU: “Peru, Huánuco Department, Yuyapichis, Panguana Stat. , 2.- 18.10.2009, - 9.616667S, - 74.9333W, Burmeister leg.”, 1 ex., ( ZSM) GoogleMaps ; “ Peru, Huánuco Department, Panguana, Yuyapichis river , 25.vii.2013, - 9.616667S, - 74.9333W, at light, R. Apenborn leg.”, 2 exs., ( ZSM) GoogleMaps . PARAGUAY: “Paraguay, Dept. Central , Asuncion, 2.X.1992, leg. Drechsel ”, 8 exs., ( CGW) ; “ Paraguay, Dept. Guaira, Garay , 13.-15.X.1992, leg. Drechsel ”, 1 ex., ( CGW) ; “ Paraguay, Chaco Department Hayes, Montelindo , 2.xi.1991, U. Drechsel leg.”, 15 exs., ( CLH, ZSM) ; “ Paraguay, Amanbay P. N., Cerro Cora , 10.ii.1997, Drechsel leg.”, 3 exs. ( CLH) ; “ Paraguay, Chaco Department Hayes, Pozo Colorado , Drechsel leg.”, 2 exs., ( CLH) ; “ Paraguay, Central Department, Capiatá , ii.1995 ”, 5 exs., ( NMW) ; “ Paraguay, Central Department, Cerro Lambaré , 1-xi.1992, Drechsel leg.”, 17 exs., ( NMW) ; “ Paraguay, Guairá Department, Garay , 6-x.1992, Drechsel leg.”, 7 exs., ( NMW) . BRAZIL: “Brasilien, São Paulo, Sammlung A. Zimmermann ”, 1 ex., ( ZSM) ; “ Brasilien, São Paulo, Tiete Floresta , 17.x. 1900, Sammlung A. Zimmermann”, 1 ex., ( ZSM) ; “ Brasilien, Sammlung A. Zimmermann”, 1 ex., ( ZSM) .

Diagnosis. TL= 9.6–10.4 mm; TL-H = 8.9–9.7 mm; MW 4.9–5.4 mm; pronotum testaceous with a black band on the anterior and posterior margin; elytron with basal fasciae not confluent with subbasal, longitudinal and yellowish stripe ( Fig. 2D View FIGURE 2 ); elytron with sublateral and lateral yellow stripes together or separate, forming a lateral and broad longitudinal band. Protarsomere I without a series of spines across the dorsal surface; metatibia with bifid setae parallel to dorsal margin on posterior surface; median lobe of aedeagus with apex rounded in lateral view, and sinuate on preapical dorsal margin ( Fig. 7 View FIGURES 4–7 ).

Differential diagnosis. Hydaticus xanthomelas is the smallest Neotropical species of the genus, which can easily be used to separate it from the other species with basal fasciae on elytra, such as H. devexus , H. lateralis and H. subfasciatus .

Distribution. Hydaticus xanthomelas has been recorded for Brazil, Bolivia, Paraguay and Argentina ( Trémouilles 1996; Benetti & Hamada 2003; Ferreira (Jr.) & Braga 2009; Miller & Bergsten 2014). Its range of distribution has extended now northwards to Peru.

Ecology. Hydaticus xanthomelas was collected in lowland rivers and smaller streams, rich in submerged and emerged vegetation ( Trémouilles 1996). The two specimens from Panguana were collected at light, not far away from an open cattle farming area near the research station.

References

Aube, C. (1838) Hydrocanthares et gyriniens. In: Dejean P. F. M. A. (Ed.), Species general des coleopteres de la collection de M. le Comte Dejean. Vol. VI. Francia, Paris, 804 + xvi pp.

Benetti, C. J. & Hamada, N. (2003) Fauna de coleopteros aquaticos (Insecta: Coleoptera) na Amazonia Central, Brasil. Acta Amazonica, 33 (4), 701 - 710. https: // doi. org / 10.1590 / S 0044 - 59672003000400015

Ferreira (Jr.), N. & Braga, R. B. (2009) Dytiscidae e Noteridae (Insecta, Coleoptera) registrados no estado de Rio de Janeiro, Brasil. Arquivos do Museu Nacional, Rio de Janeiro, 67 (3 / 4), 321 - 327.

Brulle G. A. (1837 - 1842) Insectes coleopteres: tribus carabiques, hydrocanthares, palpicornes, In: Blanchard, E. & Brulle, G. A. (1837 - 1847), Insectes de l'Amerique meridionale recueillis par Alcide d'Orbigny. In: d'Orbigny, A. D. (1835 - 1847) Voyage dans l'Amerique meriodionale (le Brezil, la Republique orientale de l'Uruguay, la Republique Argentine, la Patagonie, la Republique du Chili, la Republique de Bolivie, la Republique du Perou) execute pendant les annees 1826, 1827, 1828, 1829, 1830, 1831, 1832 et 1833 par Alcide d'Orbigny. Tome sixieme. 2. e partie: Insectes. P. Bertrand & Ve Levrault, Paris & Strasbourg, pp. 1 - 60. [pp. 1 - 56 published in 1837, pp. 57 - 72 in 1842]

Miller K. B. & Bergsten, J. (2014) The Phylogeny and Classification of Predaceous Diving Beetles. In: Yee, D. (Eds.), Ecology, Systematics, and the Natural History of Predaceous Diving Beetles (Coleoptera: Dytiscidae). Springer, Dordrecht, 468 pp. https: // doi. org / 10.1007 / 978 - 94 - 017 - 9109 - 0 _ 3

Miller, K. B. & Bergsten, J. (2016) Diving beetles of the World. Systematics and Biology of the Dytiscidae. Johns Hopkins University Press, Baltimore, 320 pp.

Nilsson, A. N. & Hajek, J. (2019) A world catalogue of the family Dytiscidae, or the diving beetles (Coleoptera, Adephaga). Version 1. I. 2019. Distributed as a PDF file via Internet. Available from: http: // www. waterbeetles. eu (accessed 08 February 2019)

Sharp, D. (1882 a) On aquatic carnivorous Coleoptera or Dytiscidae. Scientific Transactions of the Royal Dublin Society, 2 (2), 179 - 1003. https: // doi. org / 10.5962 / bhl. title. 9530

Tremouilles, E. R. (1996) Revision del genero Hydaticus Leach en America del sur, con descripcion de tres nuevas especies (Coleoptera, Dytiscidae). Physis, Buenos Aires, 52 B (122 - 123), 15 - 32. [1994]

Figures

FIGURE 2. Dorsal habitus of H. panguana sp. nov. (A), H. lateralis (B), H. subfasciatus (C) and H. xanthomelas (D). All specimens collected in Panguana, Peru. Scale bar = 5 mm.

FIGURES 4–7. Median lobe of aedeagus in dorsal (A) and lateral view (B): H. panguana sp. nov. (4), H. lateralis (5), H. subfasciatus (6), and H. xanthomelas (7). Scale bar = 1 mm.