Aphelonotus major Harris, 1931: 19 (n. sp.).
DIAGNOSIS: This, the largest species of Aphelonotus, ranges in length from 5.05–5.57 mm; the basal portion of pedicel ranges in length from 0.86–0.91 mm. The paramere angle is broadly curving as is the strongly elongate, nearly parallel-sided blade. Most similar in size to A. paramedius, but distinguished from that species by differences in size and paramere structure; A. major much larger and inner angle of the paramere with a dull tooth in A. paramedius and a cleft in A. major.
DISTRIBUTION: Along most of the length of the Amazon River.
DISCUSSION: Our concept of this species is based on the examination of the holotype and a topotypic paratype, and of substantial additional material, and the homogeneity of size and paramere structure for this very large species.
HOLOTYPE: BRAZIL: Amazonas: Teffé [sic], 3.3667 ° S 64.7 ° W, 28 Jan 1920, H.S. Parish, 1♂ (AMNH _ PBI 00413096) (USNM).
PARATYPE: BRAZIL: Amazonas: Teffé [sic], 3.3667°S 64.7°W, 21 Jan 1920, H.S. Parish, 1♀ (AMNH _ PBI 00374315) (USNM).
OTHER SPECIMENS EXAMINED: BRAZIL: Amazonas: Coari: Base de Operações Geólogo Pedro de Moura, Porto Urucu, CL 24, 4.84722 ° S 65.08417 ° W, 85 m, 06 Sep 2006, unknown collector, 2♀ (AMNH _ PBI 00413040, AMNH _ PBI 00413043) (AMNH), 1♂ (AMNH _ PBI 00413045), 1♀ (AMNH _ PBI 00413038) (MPEG). Base de Operações Geólogo Pedro de Moura, Porto Urucu, J22, 4.88722 ° S 65.22694 ° W, 85 m, 22 Sep 2006, unknown collector, 1♂ (AMNH _ PBI 00413044) (AMNH). Base de Operações Geólogo Pedro de Moura, Porto Urucu, J40, 4.87694 ° S 65.15083 ° W, 85 m, 17 Jul 2006, unknown collector, 1♂ (AMNH _ PBI 00413036) (AMNH). Base de Operações Geólogo Pedro de Moura, Porto Urucu, J61, 4.81306 ° S 65.0325 ° W, 85 m, 14 Jul 2006, unknown collector, 1♀ (AMNH _ PBI 00413041) (MPEG). Base de Operações Geólogo Pedro de Moura, Porto Urucu, J66, 4.81139 ° S 65.03361 ° W, 85 m, 10 Jul 2006, unknown collector, 1 nymph (AMNH _ PBI 00413035) (AMNH). Base de Operações Geólogo Pedro de Moura, Porto Urucu, J70, 4.80639 ° S 65.03472 ° W, 85 m, 08 Jul 2006, unknown collector, 1♀ (AMNH _ PBI 00413037) (AMNH). Base de Operações Geólogo Pedro de Moura, Porto Urucu, J87, 4.84167 ° S 65.06417 ° W, 85 m, 27 Sep 2006, unknown collector, 1♀ (AMNH _ PBI 00413042) (AMNH), 1♂ (AMNH _ PBI 00413039) (MPEG). Parintins, 2.63111 ° S 56.68333 ° W, 6 m, 01 Aug 1935, G. V. Vredenburg, 1♀ (UCR _ ENT 00048876) (BMNH). Tefé, 3.366 ° S 64.7 ° W, 2007, R. A. Puente, unknown collector, 1♂ (AMNH _ PBI 00414374) (CIAP). Mato Grosso: Tapirape Indian Village at confluence of R. Tapirape and R. Araguaia, 10.65426 ° S 50.60386 ° W, 01 Dec 1960 - 11 Dec 1960, B. Malkin, 1♀ (UCR _ ENT 00021711) (FMNH). ECUADOR: Orellana: Yasuni Bio. Res. Stn., 0.66667 ° N 76.38333 ° W, 01 Jul 1998, B. Brown, 1♂ (UCR _ ENT 00077050) (UCR). PERU: Loreto: San Antonio, 4.45 ° S 74.1 ° W, 103 m, 23 Aug 1965, J.C. Hitchcock, 1♀ (AMNH _ PBI 00271787) (USNM). Yasua Indian village, at headwaters of the Rio Loreto Yacu, 3.47502 ° S 72.51718 ° W, 22 Apr 1970 - 02 May 1970, B. Malkin, 2♀ (AMNH _ ENT 00033763, AMNH _ ENT 00033764) (AMNH). Ucayali: Pucallpa, 3.4636 ° S 72.9225 ° W, 150 m, 03 Dec 1971, R. T. Schuh, 1♀ (AMNH _ ENT 00033765) (AMNH).