3536 Author Fu, Yue Author Saether, Ole A. text Zootaxa 2012 2012-11-02 3536 1 61 journal article 1175­5334 1396DBB0-D7EE-4597-B6AC-40525D1A0A84 Key to Nearctic larvae of Corynoneura Winnertz (based on Bolton 2007 and Epler 2001 ) 1. Head capsule integument pustulate/granulate; mentum with 2 median teeth; known only from southern Florida .................................................................................................... C. sp. F (Epler) – Head capsule integument sculptured with fine ridges, or smooth, unsculptured..................................... 2 2. Head capsule integument sculptured with fine ridges that are usually in a reticulate pattern (sculpturing usually strongest dorsally, but may be faint and difficult to see)...................................... 3 – Head capsule integument smooth, unsculptured............................................................. 7 3. Mentum with 2 median teeth; antenna slightly shorter than head capsule (AL/HL = 0.8–0.9)........... C. acuminata sp. n. – Mentum with 3 median teeth; antenna longer than head capsule................................................. 4 4. Antenna about twice as long as head capsule (AL/HL = 1.8–2.2); head capsule weakly sculptured; mentum with 5 lateral teeth; premandible not noticeably toothed at 400X; subbasal seta of posterior parapod with a star-shaped sclerotized ring around the attachment area; lotic and lentic habitats....................................................... C. macula sp. n. – Antenna shorter (AL/HL = 1.1–1.7); other characters variable.................................................. 5 5. Mentum with first lateral tooth reduced and partially fused with median teeth or absent, in which case there are only 4 lateral teeth; premandible not noticeably toothed at 400X (fine teeth visible at 1000X ); this is the most commonly collected species in different-sized lotic habitats, from rheocrenes to large rivers...................................... C. lobata Edwards – Mentum with first lateral tooth not reduced or partially fused, 5 lateral teeth; premandible noticeably toothed at 400X; lentic habitats............................................................................................. 6 6. Head capsule weakly sculptured; antenna only slightly longer than head capsule (AL/HL= 1.1–1.2); subbasal seta of posterior parapod with only short lateral spinules arising near base...................................... C. edwardsi Brundin – Head capsule strongly sculptured; antenna at least 1.5 times as long as head capsule (AL/HL = 1.5–1.8); subbasal seta of posterior parapod often with one or two spinules arising from oneside near base...................... C. scutellata Winnertz 7. Mentum with 2 median teeth............................................................................ 8 – Mentum with 3 median teeth............................................................................. 9 8. Antenna only? with segment 3 dark; subbasal seta of posterior parapod with lateral spinules originating from about half or more of the length of main shaft; inhabits small streams to large rivers............................ C. floridaensis sp. n. – Antenna with segments 2 and 3 dark; subbasal seta of posterior parapod with lateral spinules. originating from about third of the length of the main shaft................................................................ C. sp. 12 (Bolton) 9. Antenna very long (AL/HL = 2.2–2.5, A1L/HL? =1.1–1.3); premandible noticeably toothed at 400X; mentum sometimes with a small 6th lateral tooth; lentic habitats.................................... C. doriceni Makarchenko et Makarchenko – Antenna not unusually long (AL/HL = 0.8–1.8); premandible not noticeably toothed at 400X (fine teeth may be visible at 1000X ); mentum with only 5 lateral teeth................................................................. 10 10. Mentum with 1st lateral tooth reduced, not as wide as 2nd lateral tooth.......................................... 11 – Mentum with 1st lateral tooth not reduced................................................................. 14 11. Antenna slightly shorter than length of head capsule (AL/HL = 0.8–0.9); posterior parapod subbasal seta with long lateral spinules that primarily arise from one side; inhabits small to medium sized streams................... C. caudicula sp. n. – Antenna longer than head capsule (AL/HL = 1.1–1.8)....................................................... 12 12. Antenna AL/HL = 1.1–1.5; posterior parapod subbasal seta with lateral spinules usually arising primarily on one side; inhabits rheocrenes.............................................................................. C. ascensa sp. n. – Antenna AL/HL = 1.3–1.8; posterior parapod subbasal seta with lateral spinules usually arising more equally on both sides; inhabits larger streams or lentic habitats................................................................... 13 13. Antenna AL/HL = 1.3; lentic habitats......................................................... C. sp. 6 (Bolton) – Antenna AL/HL = 1.6–1.8; inhabits small to medium-sized streams................................. C. sp. “ lacustris ” 14. Antenna AL/HL = 1.1; inhabits shallow vernal woodland pools................................... C. disinflata sp. n. – Antenna AL/HL = 1.6; inhabits rheocrenes.................................................... C. sp. 10 (Bolton)