Three new species of Tetilla Schmidt, 1868 (Tetillidae, Spirophorida, Demospongiae) from Bahia, northeastern Brazil Author Fernandez, Julio C. C. Author Peixinho, Solange Author Pinheiro, Ulisses S. Author Menegola, Carla text Zootaxa 2011 2978 51 67 journal article 10.5281/zenodo.206930 f2ac3d05-f822-4176-bf54-648424a81eb2 1175-5326 206930 Key to the Tetilla species occurring in the Atlantic Ocean 1a. Oxeas present....................................................................................... 2 1b. Oxeas absent; one size of protriaenes and anatriaenes; microscleres absent................................ T. truncata 2a. One category of oxeas.................................................................................. 3 2b. Two or more categories of oxeas.......................................................................... 9 3a. Protriaenes present................................................................................... 4 3b. Protriaenes absent; a single category of oxeas, anatriaenes and sigmaspires............................. T. sigmophora 4a. One category of protriaenes............................................................................. 5 4b. Two categories of protriaenes; sigmaspires centrotylote.............................................. T. geniculata 5a. Regular sigmaspires present............................................................................ 6 5b. Regular Sigmaspires absent............................................................................. 7 6a. Anatriaenes present.................................................................................... 8 6b. Anatrienes absent; oxeas of 2326 / 24 µm; protriaenes with 197 / 5 µm (larger clade) and 51/ 4 µm (smaller clade); sigmaspires 24–28 µm................................................................................... T. sandalina 7a. Oxeas (medium length/ medium thickness): 1.100 µm / 7.6 µm; triaenes (rhabdome / cladome): protriaenes> 3.500 / 49–194 µm; anatriaenes> 5.600 µm/ 29–50................................................................ T. radiata 7b. Oxeas (medium length/ medium thickness): 2.000 µm/ 20 µm; protriaenes not measured; anatriaenes absent.. T. euplocamos 8a. Oxeas less than 1.500 µm; triaenes (rhabdome, cladome length/thickness): protriaenes 1800–2000/ 4 µm, 35–70/ 3 µm; anatri- aenes 2500–3.000/ 5 µm, 30–40 µm; sigmaspires 10 µm............................................ T. pedonculata 8b. Oxeas greater than 3.000 µm; protriaenes 2.000–3.000 µm; sigmaspires 12 µm............................. T. africana 9a. Two categories of oxeas............................................................................... 10 9b. Three categories of oxeas.............................................................................. 13 10a. Three categories of triaenes; sigmaspires present............................................................ 11 10b. Four categories of triaenes (two of protriaenes and two of anatriaenes); sigmaspires absent and oxeas form a halichondroid sec- ondary skeleton......................................................................... T. muricyi sp. nov. 11a. Two categories of protriaenes and one single of anatriaenes................................................... 12 11b. A single category of protriaenes (rhabd. 5.300 µm, larger clade> 140 µm, smaller clades 80–95 µm) and two of anatriaenes (I: rhabd 6.000, larger cladi 225–240/20 µm; II: 1.150 µm, 55–110 µm); sigmaspires 34–40 / 4 µm................. T. nimia 12a. Oxeas I with a maximum length of 5.000 µm; protriaenes I with length up to 2.000 µm and protriaenes II with up to 300 µm; anatriaenes of 5.000–8.000 µm in length by 10–15 µm thick......................................... T. bonaventura 12b. Oxeas I greather than 5.500 µm;; protriaenes I with length greater than 5.000 µm (up to 10.000 µm) and protriaenes II with up to 1.000 µm; anatriaenes of 12.000 µm in length by 35–40 µm thick..................................... T. capillosa 13a. Five categories of triaenes (2 types of protriaenes and three of anatriaenes); one single category of sigmaspires............................................................................................. T. pentatriaena sp. nov. 13b. Three categories of triaenes (2 of protriaenes and one of anatriaenes); sigmaspires absent............ T. rodriguesi sp. nov.