Trichorhina Budde-Lund 1908
Creators: name: Souza, L. A.
name: Araújo, J. P.
name: Campos-Filho, I. S.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Platyarthridae
Trichorhina

description: <b>Key to the species of <i>Trichorhina</i> from Brazil</b> 1. Ischiumof pereopod VIIof themalewithconspicuous expansion................... <i>T. tatianae</i> Ischium without expansion.................2 2. Eyeless or with only one diminute ommatidium; unpigmented........................... 3 At least one well developed ommatidium; colorvariable........................... 4 3. Telson acutely pointed; antennary tubercles prominent........................... <i>T. brasiliensis</i> Telson subtriangular broadly rounded; antennary tuberclesnotprominent............... <i>T. pittieri</i> 4. Pereonite VII with two <i>noduli laterales</i> on each side.............................. 5 Pereonite VII with only one <i>nodulus lateralis</i> oneachside......................... 7 . . 5. Left mandible with rods between molar and incisory processes; eye with five ommatidia; <i>nodulilaterales</i> withfeaturelessbase................................ <i>T. guanophila</i> Left mandible without rods between molar and incisory processes; eye with one or two ommatidia; <i>nodulilaterales</i> with base provided withtwolateralprocesses............. 6 6. Eye formed by two unequally sized.............................. <i>T. heterophthalma</i> Eyeformedbyonlyoneommatidium................................. <i>T. tomentosa</i> 7. Second article of antennal peduncle ridged or crested..............................8 Secondarticleof antennalpeduncle............................................9 8. Eye formed by 15 ommatidia; second article of antennal peduncle with dorsal keel (Fig. 111)................. <i>T. tropidocerata</i> sp. nov. Eye formed by five ommatidia; second article of antennal peduncle with outer crenulate (Fig. 12)................... <i>T. biumbonata</i> sp. nov. 9. Eye formed by a single very large ommatidium.......................... <i>T. macrops</i> Eye formedbyatleastfour ommatidia.... 10 10. Eyeswithfourommatidia............ 11 Eyeswithfivetotenommatidia......... 13 11. <i>Noduli laterales</i> very close to the posterior border of pereonites I–VII (ratio b/c smaller than 0.1).......................12 <i>Noduli laterales</i> located more far of the posterior border of pereonites I–VII (ratio b/c larger than 0.2, larger than 0.1 in P VII) (Fig. 6)................... <i>T. sexdens</i> sp. nov. 12. Telsonclearlyacute............. <i>T. acuta</i> Telsonsubtriangular, withroundedapex.. <i>T.paraensis</i> 13. Eyesformedbyeight totenommatidia...... 14 Eyes formed by five to six ommatidia.......15 14. <i>Nodulilaterales</i> with steep increase from PIto PIIin d/c (Fig. 2)....... <i>T. crassisetae</i> sp. nov. <i>Noduli laterales</i> without steep increase from PIto PIIin d/c......... <i>T. amazonica</i> 15. Exite of maxillula with 4+4 (two cleft) teeth....................... <i>T. argentina</i> Exite of maxillula with 3+3–4 (zero to two cleft) teeth...........................16 16. Pereon yellow to brown, pleon unpigmented; only six teeth at exite of maxillula, none cleft; molar process of left mandible with three penicils.................... <i>T. bicolor</i> Body background of pereon and pleon uniform; seven teeth in exite of maxillula, one or two cleft; molar process of left mandible with onlyonepenicil.................... 17 17. Body background brown with darker spots in head; eyes lighter; one cleft tooth in exite of maxillula (Fig. 50)............... <i>T. lenkoi</i> sp. nov. Body pale yellow to unpigmented; eyes dark brown to black; two cleft teeth in exite of maxillula...............................18 18. Carpus of pereopod Iof male without bristle field (Fig. 70).......... <i>T. myrmecophila</i> sp. nov. Carpus of pereopod Iof male with bristle field (Fig. 90)............. <i>T. orensis</i> sp. nov.
description: Published as part of <i>Souza, L. A., Araújo, J. P. &amp; Campos-Filho, I. S., 2011, The genus Trichorhina Budde-Lund in Brazil, with description of seven new species (Isopoda, Oniscidea, Platyarthridae), pp. 239-261 in Iheringia, Sér. Zool. 101 (32)</i> on pages 255-260, DOI: 10.1590/S0073-47212011000200012, http://zenodo.org/record/3574613