Anacroneuria itajaimirim Bispo & Froehlich 2004

Anacroneuria itajaimirim Bispo & Froehlich, 2004 (Figure 2) Anacroneuria itajaimirim Bispo & Froehlich 2004: 105, description; Froehlich 2010: 159, catalog; Almeida & Bispo 2020: 15, pictures and COI sequences. Material examined. BRAZIL, São Paulo: Iporanga, Parque Estadual Intervales, Três Córregos, 16.vii.2023, Almeida & Taniguti col., 4 nymphs. Nymph description. General color brown in dorsal view and light yellow in ventral view. Head bicolored with subtly distinguishable light-brown M line (Figure 2A). Labrum brown; frontoclypeus brown with an ochraceous anterior band (Figure 2A). Posterior part of the head light yellow with posterior end of occiput light brown; eyes and ocelli black (Figure 2A). Scape and pedicel brown, flagellum light brown (Figure 2A). Labium brownish (Figure 2E). Mandibles brown and laterally dark brown with a dense brush of bristles in molar area; five teeth, the first being smaller than the others, the second, third and fourth similar in size (Figure 2F). Maxillae brown (Figure 2G). Pronotum brown with median line and rugosities lighter (Figure 2A). Mesonotum and metanotum brown with light yellow pattern; wing pads brown with light yellow apex (Figure 2B). Legs ochraceous; femur covered with sparse bristles, anteriorly and posteriorly with high density of thick bristles; tibia posteriorly with well-developed band of hairs (Figure 2D). Abdomen brown (Figure 2C); cercus light brown with a ring of long bristles on each segment, segments differ in shape and size from base to apex (Figure 2H). Thoracic gills: ASC1, PSC1, AT2, AT3, PT3, and A1 (sensu Shepard & Stewart 1983). Measurements. Nymph (n=4). Mean head width = 3.55 mm; mean body length = 11.84 mm; mean length of antenna = 7.89 mm; mean length of the cercus = 9.56 mm. Remarks. The nymph of A. itajaimirim exhibits some similarities to the nymph described as A. debilis by Avelino-Capistrano et al. (2011). Both species have a pattern of spots on the head and pronotum, characterized by a dark spot running from the frontoclypeal region to near the ocelli. However, there are notable differences between the two species. In A. debilis, the posterior edge of the dark spot begins anterior to the compound eyes and extends posteriorly to the ocelli, forming an almost V-shaped spot (see figure 2 in Avelino-Capistrano et al. 2011). On the other hand, in A. itajaimirim, the dark spot has constrictions that give it a different shape, ending and forming a Ushaped spot anterior to the ocelli (Figure 2A).