New records of Platynectes (s. str.) diving beetles from South America with description of two new species (Coleoptera: Dytiscidae: Agabinae)
Short, Andrew Edward Z.
Benetti, Cesar J.
Gustafson, Grey T.
Acta Entomologica Musei Nationalis Pragae
2020
2020-07-28
60
2
437
447
8LZ7X
Gustafson, Short & Miller
2016
[953,1310,835,859]
Insecta
Dytiscidae
Platynectes
Animalia
Coleoptera
6
443
Arthropoda
species
garciai
Platynectes
New material examined(23 exs). BRAZIL: PΑ Rá:Vale do Paraíso, ca. 55 kmN.Alenquer, -1.49292, -54.51566, 150 m, 3.ii.2018, leg. Short & Benetti, pool with rock sand detritus, BR18-0203-01E (11 exs, INPA, SEMC, including DNA voucher SLE1592); same data but isolated detrital pool, BR18-0203-01F ( 1 ex., SEMC). Rο RΑΙΜΑ:Amajari County, 3 47.334’N, 61 42.570’W, Serra do Tepequém, 14.i.2018, leg. A. Short, C. Benetti, & L. Santana, small forested stream, BR18-0114-02A (6 exs, INPA, SEMC, DNA voucher SLE1590); Caracaraí County, Serra da Mocidade, igarapé (stream), 1.60275 N 061.900044 W, 17.i.2016, leg. K.D. Silva ( 1 ex., INPA). GUYANA:GY14-0316-01A ( 1 ex., SEMC, DNA voucher SLE 1594). SURINAME: SΙΡΑLΙWΙΝΙ DΙ SΤRΙCΤ: SipaliwiniSavannah Nature Reserve, Four Brothers Mountains, 2 00.342′N, 55 58.149′W, 337 m, 31.iii.2017, leg.A.E.Z. Short, sandy bottom stream with emergent vegetation at night, SR17-0331-01F (3 exs, SEMC, including DNA voucher SLE1245).
Distribution.Described from a cluster of closely situated localities in southeastern Venezuelaand western Guyana, we here extend the distribution south to the Amazon River ( Fig. 12). We found one specimen on the summit of the Serra do Tepequem, a low Tepui formation in northern Brazilnear the border with Venezuela; this locality is very close to its existing distribution. We were surprised, however, when we found specimens on an inselberg in the SipaliwiniSavannah along the southern border of Suriname, and even more surprised when we encountered it near in a rocky stream in the foothills to the Amazon River in Pará State, Brazil.
Remarks.Despite the large range from La Escalera region of Venezuelato the Amazon River, COI sequences for populations from Brazil, Guyana, Venezuelaand Surinameare nearly identical ( Fig. 1).