Identification key to the Gerridae (Insecta: Heteroptera: Gerromorpha) from the Amazon River floodplain, Brazil, with new records for the Brazilian Amazon

Abstract

Eighteen species from seven genera are recorded from the Amazon River floodplain, Brazil. An identification key, diagnoses, drawings, and taxonomic and biological notes are given for these species. The main features used in the identification key and diagnoses are: body and leg segments proportions, coloration patterns, presence and distribution of setae, and modifications of the apical abdominal segments and external genitalia of the male. Based on material collected in the floodplain streams and lakes, Cylindrostethus bassleri Drake, 1952 is recorded for the first time from Brazil, and new municipality records are presented for Brachymetra lata Shaw, 1933, B. shawi Hungerford & Matsuda, 1957, C. erythropus (Herrich-Schäffer, 1850), C. linearis (Erichson, 1848), C. Palmaris Drake & Harris, 1934, C. regulus (White, 1879), Neogerris lotus (White, 1879), N. lubricus (White, 1879), N. visendus (Drake & Harris, 1934), Ovatametra obese Kenaga, 1942, Rheumatobates crassifemur esakii Schroeder, 1931, R. klagei Schroeder, 1931, and Trepobates taylori (Kirkaldy, 1899). Additional new records from the Brazilian Amazon are presented for B. lata and O. obesa

Aquatic and semiaquatic bugs (Insecta, Hemiptera, Heteroptera) from Toluviejo Municipality, Sucre Department, Caribbean region of Colombia

“…Gelastocoris hungerfordi is herein recorded for the first time from Sucre Department, but occurs throughout a wide geographic area, from southern United States to northern Brazil (Millspaugh 1939, Todd 1961 Microvelia mimula is an extremely common and easily recognized species found in pools and ponds from Cuba to Argentina (Cordeiro and Moreira 2015), and the lack of previous records from Colombia is surely tied to the almost complete absence of studies regarding this genus in the country. Ovatametra obesa is not an uncommon species in northern Brazil (Moreira et al 2011), and the first record from Colombia is not surprising. As explained in the results above, the taxonomy of this genus is not well resolved, and published records of other species in the country (Padilla-Gil 2016) might be based on misidentifications.…”

Systematics of the South American species of Cylindrostethus Mayr, 1865 (Hemiptera : Heteroptera : Gerridae), with a new species from Amazonian Brazil and Peru

“…16A-C), we concluded that specimens previously identified as C. erythropus, syn. nov. by , and Moreira et al (2011a) are, in fact, representatives of C. linearis. redescribed C. linearis based on specimens of the type series; according to the drawings provided by the authors, the basolateral processes of the proctiger are curved with an acute apex.…”

“…linearis (Erichasin, 1848); C. meloi C. podargus Drake, 1958; C. regulus (White, 1879); and C. stygius (Drake, 1961) are known only from northern South America (Drake 1952;Moreira et al 2011aMoreira et al , 2011b.…”

“…Ecological and biological data on species of Cylindrostethus are scarce. In Brazil, some authors observed a few species in streams, rivers and ponds (Moreira et al 2011a), usually in shaded habitats (Nieser and Melo 1997). They can be found in association with macrophytes, floating litter banks and exposed roots (Pereira et al 2007).…”

New records of Gerromorpha (Insecta: Hemiptera: Heteroptera) from Brazil

“…Geographic distribution: N -Amazonas (Kenaga 1942;Nieser 1970;Pereira and Melo 2007;Moreira et al 2011b) and Pará (Nieser 1970). Tachygerris adamsoni (Drake, 1942) Geographic distribution in Brazil: N -Amazonas (Nieser 1970) and Pará (Nieser 1970;Moreira et al 2011d); CW -Mato Grosso (Nieser 1970;Fernandes and Wanzeler 2010); SE -Minas Gerais (Nieser and Melo 1997) and Rio de Janeiro (Drake 1942;Moreira et al 2011d).…”