Limnogonus ignotus Drake & Harris, 1934

Canejo, Rafael P. R., Melo, Alan Lane De & Rodrigues, Higor D. D., 2023, Gerromorpha (Insecta: Hemiptera: Heteroptera) from the state of Rio Grande do Norte, northeastern Brazil, including a new synonymy, Zootaxa 5357 (2), pp. 151-185 : 154-157

Limnogonus ignotus Drake & Harris, 1934

( Figs. 2D–F , 3B )

Limnogonus ignotus Drake & Harris, 1934: 205–206 (original description).

Identification. Our specimens were identified based on the length of antennomere I less than or equal to the width of the head across the eyes; the body length of apterous specimens 5.8–6.2 mm, the macropterous specimens 7 mm long; and male abdominal sternum VIII without a curved spine-like protuberance ( Fig. 2F ) ( Nieser 1970; Nieser & Melo 1997).

Discussion. The specimens from Rio Grande do Norte have the dorsal part of the mesopleuron brown to lightbrown ( Fig. 2F ), similar to L. profugus Drake & Harris, 1930 , and opposed to the reddish-brown typical of L. ignotus . However, the length of antennomere I less than or equal to the width of the head across the eyes, in addition to the total length of the body, led us to identify the specimens examined here as L. ignotus .

Material examined. BRAZIL, Rio Grande do Norte: Natal, Rio Pitimbu - BR 101, 5°52’48.1”S, 35°13’32.6”W, 22-XII-2019, R . P. R. Canejo leg. (1♀ apterous CEAAVF) ; Nísia Floresta, Lagoa na FLONA , 6°04’31.8”S, 35°10’37.0”W, 28-VI-2022, R . P. R. Canejo leg. (3♂, 1♀ macropterous CEAAVF) ; Extremoz , CTA - lagoa com água de chuva, 5°40’56.7”S, 35°14’28.3”W, 22-X-2022, R .P. R. Canejo leg. (2♂, 5♀ apterous CEAAVF) .

Figures

FIGURE 2. Species of Limnogonus from state of Rio Grande do Norte. (A–C) Limnogonus aduncus, (A) dorsal, (B) ventral and (C) lateral views of apterous male, white arrow indicates single curved spine-like protuberance on abdominal sternum VIII. (D–F) Limnogonus ignotus, (D) dorsal, (E) ventral and (F) of macropterous male. (G–I) Limnogonus recurvus, (G) dorsal, (H) ventral and (I) lateral view of apterous male. Scale bars = 1.00 mm.

FIGURE 3. (A–B) Distribution records for species of Gerromorpha in state of Rio Grande do Norte, northeastern Brazil.