Hydrochus bituberculatus Perkins

Perkins, Philip D., 2021, Taxonomy of water beetles in the genus Hydrochus Leach, 1817, from Bolivia, Brazil and Paraguay (Coleoptera: Hydrochidae), Zootaxa 4994 (1), pp. 1-93 : 41-42

publication ID

https://doi.org/ 10.11646/zootaxa.4994.1.1

publication LSID

lsid:zoobank.org:pub:107FCA64-345F-40A4-99D3-5C1441EEAD93

persistent identifier

https://treatment.plazi.org/id/03A187DE-FFD4-FFD6-6194-F9D7014CF53A

treatment provided by

Plazi

scientific name

Hydrochus bituberculatus Perkins
status

 

Hydrochus bituberculatus Perkins View in CoL

Fig. 5 View FIGURE 5

Hydrochus bituberculatus Perkins 2019: 11

Originally described from Venezuela; additional locality records have been published for Ecuador and Peru ( Perkins, 2020b, c). Habitus and male genitalia images are given in Perkins (2019c). The following new locality and deposition records are from Bolivia, Brazil, and Paraguay.

Material examined (62): Bolivia: Beni, 7 km SW Trinidad , elev. 163 m (14°52’12’’S, 64°57’32’’W), 18.vii.1998, leg. K. B. Miller (1 SEMC) GoogleMaps ; Beni Stn., Palm Camp, NE. of San Borja , 6–9.viii.1988, leg. Robert W. Brooks (1 SEMC) ; Santa Cruz, 60 mi. N. Santa Cruz, Saavedra Exp. Sta. , 27–30.xii.1959, leg. Robert Cumming (22 NMNH) ; Ayacucho , 13–14.v.1969, leg. P. & P. Spangler (12 NMNH) ; Okinawa , 6.vi.1958, leg. E. Pinckert (6 NMNH) ; Potrerillos del Guenda, Preserva Natural , elev. 370 m (17°40’S, 63°27’W), 17–22.x.2007, leg. J. & F. Romero (1 SEMC) GoogleMaps ; Santa Cruz, 11–12.v.1969, leg. P. & P. Spangler (7 NMNH) . Brazil: Goias, Santa Isabel, Ilha do Bananal, Rio Araguaia , 12–22.viii.1957, leg. B. Malkin (1 NMNH) ; Mato Grosso, Corumba , (17°32’S, 56°27’W), 21–23.ii.1954, leg. Gans & Pereira (5 NMNH) GoogleMaps ; Mato Grosso side of Rio Araguaia, Santa Isabel , (17°12’S, 57°0’W), 12–22.viii.1957, leg. Borys Malkin (2 NMNH) GoogleMaps ; Mato Grosso do Sul, Corumbá, Corumba, Paraguay River -18.95184 -57.66642, 101m, 25.vi.2018, Macrophytes along river margins and in floating island mats, Hamada and team, BR18-0625-01A (2 INPA, SEMC) GoogleMaps . Paraguay: Dep. San Pedro, Puerto Antequera , 540 ft., black lights, 24.vi.2006, leg. W.D. Shepard (WDS-T-193) (2 SEMC) .

Remarks. Specimens from Brazil are usually smaller than the holotype, which is from Venezuela. The male genitalia of Brazilian specimens are smaller, narrower (for example, basal piece length/width ratio ca. 2.3 for Brazil, and 1.8 for Venezuela) and have the paramere tips shaped slightly differently than the holotype (the lateral margin of the tips between the plsa and the apex are very slightly arcuate in the holotype, and very slightly emarginate in Brazilian specimens). However, specimens from Bolivia and Peru are intermediate in these characters.

SEMC

University of Kansas - Biodiversity Institute

NMNH

Smithsonian Institution, National Museum of Natural History

INPA

Instituto Nacional de Pesquisas da Amazonia

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydrochidae

Genus

Hydrochus

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