Antarctoperlinae Enderlein 1909

• Main Authors: McLellan, Ian D., Zwick, Peter
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2007
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Plecoptera; Gripopterygidae; Antarc*
• Online Access: https://doi.org/10.5281/zenodo.4758641; http://treatment.plazi.org/id/0399AB12FFB7FFC5E900515C50E3F9C4

Antarctoperlinae gen. sp. IV (Figs. 36 ‐ 42) Material examined. 3 LA, Prov. Linares, Catillo, 29 March 1975, CC (in coll. Zwick). Dimensions. Larva (last instar): body length 9.0; antenna 6.0; cercus 1.5. Larva. Slender, fully winged, long ‐ legged, larva. Pale matt brown, a narrow sharply delimited median longitudinal line on the abdomen. Antennae very long and slender with a darker ring in basal quarter and another just before mid ‐ length. Subgenual rings on tibiae dark brown. Pilosity not obvious, but very complex and varied at high magnification. Head not distinctive, dorsally a little concave but depression in front of occipital fork not deep; frons bulging over downwardly directed clypeus and labrum. Eyes large, distinct ocelli. Genae distinct, not as deep as width of antennal scape. Mandibles, maxillae and labium resembling Antarctoperlinae II, but hypopharynx simple, no distinct lobes. Antennae about 2/3 body length, structurally simple, no swollen or conspicuously setose parts, distal segments very thin and several times longer than wide, no distinct setae. Thorax. Pronotum with all four angles conspicuously horned laterally, the anterior horns curved posteriorly and the posterior ones curved anteriorly. Anterior and posterior margins convex, hind margin with rough short modified hairs. Raised anteromedially part of meso ‐ and metanotum with similar pilosity. Both wing pads divergent, well developed, adult obviously fully winged. Legs simple, long (apex of hind femur reaching to tergite VI), almost hairless, no keels, spines or tibial spurs. Tarsi similar to other Antarctoperlinae, but slender, first segment twice as long as wide. Abdominal segments ring ‐ shaped, middle and posterior ones strongly constricted medially, with dark spots along bulging distal edge; the setae in these insertion points are very short, club ‐ shaped to almost spatulate with the wide apices pale and transparent. Interspersed with the setae are a few long thin twisted or curled pale hairs which are best seen in slanting light ...