Cyrnellus minimus Banks 1913

Rueda Martín, Paola A., Gibon, Francois-Marie & Sganga, Julieta V., 2021, New species and records of the Neotropical genus Cyrnellus (Trichoptera: Polycentropodidae) and the re-establishment of C. minimus and C. marginalis, Zootaxa 5082 (1), pp. 15-29 : 22

Cyrnellus minimus Banks 1913

Figs 4A–4D

Cyrnellus minimus Banks 1913: 88 (original description); Flint 1967: 5 (redescription of male lectotype); Flint 1971: 29 (as synonym of C. fraternus ); Holzenthal & Calor 2017: 419 (catalogue, as synonym of C. fraternus ).

Diagnosis. Cyrnellus minimus is similar to C. fraternus , C. marginalis , C. boliviensis n. sp., and C. zapateriensis . Cyrnellus minimus and C. zapateriensis are most similar; these two species have similar subapicomesal spines on the inferior appendages, but with distinct insertion: subapical in C. minimus ( Fig. 4B , ap) but more nearly apical in C. zapateriensis . The internal lobe of each inferior appendage is triangular in C. minimus and rounded in C. zapateriensis . Another difference from most of the other species is the near fusion of the posterior arms of the dorsal phallic sclerite ( Figs 4C, 4D , ds). This character is also observed in C. ulmeri , this latter species being distinguished by the presence of a second subapicomesal spine on each inferior appendage.

Material examined. ARGENTINA: Buenos Aires: Río Paraná de las Palmas, Lima , 16.xii.1979, C.M. Flint Jr., 1 male (USNM) . BOLIVIA: Laguna Granja, Bella Vista , 13°15’50’’S, 63°42’33’’W, 06.v.2006, 1 male (IBN) . BRAZIL: Rondonia, 62 Km S de Ariquemes, Linea C-20, 7 Km E B- 65, 165 m. Fazenda Rancho Grande , 10°32,5´S, 62° 48´W, 17.xi.1991, Dr Petr., 10 males (USNM) . PARAGUAY: Dpto Concepción, Concepción, UV Light trap during 5:45–12:30 PM, warm night 5 days after heavy rain, J.A. Kochalka, 22 males (USNM); 9 Km South Villarica , 2.xii.1973, O.S. Flint Jr., 1 male (USNM) .

Distribution. Cyrnellus minimus is recorded for the first time from Bolivia. Argentina, Bolivia new record, Brazil, Paraguay.

Figures

FIGURE 4. Cyrnellus spp., male genitalia. 4A–4D, Cyrnellus minimus Banks 1913: 4A, left lateral; 4B, right inferior appendage, ventral; 4C, phallus, left lateral; 4D, phallus, dorsal. 4E–4H, Cyrnellus rianus Flint 1983: 4E, left lateral; 4F, right inferior appendage, ventral; 4G, dorsal phallic sclerite, left lateral; 4H, dorsal phallic sclerite, dorsal. ap = apex of an inferior appendage; as = subapicomesal spine; dlp = dorsolateral process; ds = dorsal sclerite; ia = inferior appendage; iap = intermediate appendage; ix = sternite IX; mlp = mesolateral process; mvp = mesoventral process.