Belostoma bachmanni De Carlo,

Stefanello, Fabiano, Ribeiro, José Ricardo Inacio & Estévez, Ana Lia, 2021, Revision of the Belostoma triangulum group (Insecta: Heteroptera: Belostomatidae), Zootaxa 4958 (1), pp. 95-102: 96-98

publication ID

https://doi.org/10.11646/zootaxa.4958.1.8

publication LSID

lsid:zoobank.org:pub:D9A893E4-4685-44EF-9250-43E3A48A12E1

DOI

http://doi.org/10.5281/zenodo.4693189

persistent identifier

http://treatment.plazi.org/id/941887C4-BF02-FFFE-FF0C-A590EC11F877

treatment provided by

Plazi

scientific name

Belostoma bachmanni De Carlo
status

 

Belostoma bachmanni De Carlo 

( Figures 2A–CView FIGURE 2)

Belostoma bachmanni De Carlo, 1957: 52–53  . ( Fig. 2AView FIGURE 2)

Belostoma bicavum Lauck, 1964: 103  . syn. n. ( Fig. 2BView FIGURE 2)

Belostoma parvoculum Lauck, 1964: 103–105  . ( Fig. 2CView FIGURE 2)

Belostoma bachmanni: De Carlo (1966: 107)  .

Belostoma bicavum: Nieser (1975: 109)  (nec Lauck) [= B. parvoculum  ].

Belostoma bachmanni: Schnack (1976: 22)  .

Size and shape. Length: male (n=12) = 19.5–20.5 mm, female (n=14) = 19.0–20.0 mm; width: male = 10.0–11.0 mm, female = 9.8–10.4 mm. Body broad.

External morphology. Head: lorogenal cleft with conspicuous fovea ( Fig. 1BView FIGURE 1); clypeogenal cleft as long as clypeoloral cleft; anteoculus longer interoculus; eyes globose, as wide as long; interocular space 1.8 to 1.95 times the width of an eye ( Fig. 1CView FIGURE 1); vertex with weak mesal carina; article II of labium slightly shorter than article III. Thorax: prosternal keel triangular-shaped, not prominent, projecting forward; pronotum quadrate, without carina; metaxiphus with mesal portion elevated anteriorly and swollen posteriorly, and distal portion concave; membrane of hemelytra reduced, as wide as the maximum width of clavus ( Figs. 2A–CView FIGURE 2). Abdomen: pilosity covering less than half of connexivum, constricted between spiracles; pilosity not developed on the VII segment and not covering the sternites.

Male genitalia. Dorsal arms of phallosoma as long as phallobase, wider at the base than at the apex, well developed, meeting at tip of the diverticulum, covering lateral margins of the diverticulum; diverticulum without ventroapical protuberance in lateral and ventral views ( Figs. 3A–CView FIGURE 3).

Diagnosis. The prosternal keel triangular, not prominent, projecting forward, and the fovea on lorogenal cleft ( Fig. 1BView FIGURE 1) are diagnostic for this species. The wide interocular space and the reduced membrane of the hemelytra are shared with B. triangulum  and other species of the genus.

Type material examined. Holotype (♂), allotype (♀), and one adult male and two nymphs paratypes of B. bachmanni  pinned ( MACN), PARAGUAY, Concepción department, Puerto Vallemí [San Lázaro municipality], VII.1952, designated by J. A. De Carlo, 1957  ; Paratypes (3 ♂ and 1 ♀) of B. bicavum  pinned ( SEMC), BRAZIL, Amazonas state, Purus river, 31.VIII.1935, Ollala, A. coll., designated by D. R. Lauck, 1959  ; Holotype (♂) of B. parvoculum  pinned ( SEMC), BRAZIL, Amazonas state, Manacapuru municipality, Solimões river, IV.1926, S. M. Klages coll., designated by D. R. Lauck, 1961  .

Additional material examined. BRAZIL, Amazonas , Novo Airão municipality, Anavilhanas National Park, 01.IX.2001, G. Machado coll., F. Stefanello, 2018 det., 3 ♀ ( INPA)  ; São Gabriel da Cachoeira municipality, 07.VIII.2010, R.L. Ferreira-Keppler & S.R.S. Torreias coll., F. Stefanello, 2018 det., 1 ♂ and 2 ♀ ( INPA)  ; Barcelos municipality, Aracá river, 00°24’13.8”S 62°55’57.6”W, 25.IX.2014, A.M.O. Pes et al. colls., F. Stefanello, 2018 det., 1 ♂ and 2 ♀ ( INPA)GoogleMaps  ; Santa Isabel do Rio Negro municipality, Jaradi stream, 00°20’14.2”S 65°12’25.7”W, 18.IX.2014. A.M.O. Pes et al. colls., F. Stefanello, 2018 det., 5 ♂ and 6 ♀ ( INPA)GoogleMaps  .

Distribution. This species was known only from the type locality. Now, its distribution also comprises part of the Amazon region, specifically in the Purus and Negro river basins, Brazil ( Fig. 4View FIGURE 4). The absence of records from Bolivia and some states in the central and north regions of Brazil is potentially related to undersampling.

MACN

Museo Argentino de Ciencias Naturales Bernardino Rivadavia

SEMC

University of Kansas - Biodiversity Institute

INPA

Instituto Nacional de Pesquisas da Amazonia

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Belostomatidae

Genus

Belostoma

Loc

Belostoma bachmanni De Carlo

Stefanello, Fabiano, Ribeiro, José Ricardo Inacio & Estévez, Ana Lia 2021
2021
Loc

Belostoma bachmanni: Schnack (1976: 22)

Schnack, J. A. 1976: )
1976
Loc

Belostoma bicavum: Nieser (1975: 109)

Nieser, N. 1975: )
1975
Loc

Belostoma bachmanni:

De Carlo, J. A. 1966: )
1966
Loc

Belostoma bicavum

Lauck, D. R. 1964: 103
1964
Loc

Belostoma parvoculum

Lauck, D. R. 1964: 105
1964
Loc

Belostoma bachmanni

De Carlo, J. A. 1957: 53
1957