Description of a new Scottocheres Giesbrecht, 1897 (Copepoda, Siphonostomatoida Asterocheridae), including an emended diagnosis and key for the genus Author Canário, Roberta Universidade de São Paulo, Instituto de Biociências, Departamento de Zoologia, Rua do Matão, 14 - Butantã, São Paulo, Brazil - CEP: 05508 - 090. Author Farias, Amilcar Author Neves, Elizabeth Author Johnsson, Rodrigo 0000-0003-1859-9421 r.johnsson@gmail.com text Zootaxa 2022 2022-12-20 5222 3 277 284 journal article 53784 10.11646/zootaxa.5222.3.5 9f45a486-36dc-4aa5-9b26-b50628e14584 1175-5326 7461583 EF50DFE2-BEED-4943-A319-93C7B2B9CA63 Scottocheres Giesbrecht, 1987 Emended diagnosis: Body elongated, cylindrical, thoracic somites without lateral projections. Rostrum absent. Female and male urosome with 3 to 4 and 4 to 5 somites, respectively. Female antennule 17 to 19-segmented, with one segment after the aesthetasc, or 2, as in S. latus . Male antennule 16-segmented with 12 supplementary aesthetascs. Antenna with exopod 1-segmented and endopod 3-segmented. Siphon forming long and thin tube. Mandibular palp absent. Maxillule with 3 setae on each lobe. Outer lobe smaller than inner one. Third exopodal segment of legs 1 to 4 with 4 plumose setae on each. Third endopodal segment of legs 1 to 4 with 6, 6, 5-6 and 4 setae, respectively. Leg 5 with basoendopod, with inner seta representing the endopod and flattened exopod, 1-segmented and armed with 3 setae. Egg sacs paired, ventral, ellipsoidal, with 3 to 5 eggs each. Remarks: When defining the diagnosis for Scottocheres , Giesbrecht (1899) described a female antennule as having 17 or 18 segments. However, Nicholls (1944) and Malt (1991) described species with 19-segmented antennules, S. latus , and S. stocki , respectively. To accommodate these Scottocheres species , it was necessary to revise the diagnosis to include 19-segmented antennules as well. FIGURE 1. Scottocheres spinoparva n. sp. , female (paratype: UFBA 3267). A, habitus, dorsal view; B, urosome; C, antennule; D, antenna; E, siphon; F, mandible stylet; G, maxillulle; H, maxilla; I, maxilliped. Scale bars: (A) 100 µm; (B) 50 µm; (C, D, H, I) 25 µm; (E, F) 5 µm; (G) 10 µm. FIGURE 2. Scottocheres spinoparva n. sp. , female (paratype: UFBA 3267). A, leg 1; B, leg 2; C, leg 3; D, leg 4. Scale bars: (A–D) 25 µm.
Coxa Basis Exopod Endopod
L1 0-0 I-0 I-1; I-1; II,2,2 0-1; 0-1; 1,2,3
L2 0-0 0-0 I-1; I-1; II,I,3 0-1; 0-1; 1,2,3
L3 0-1 0-0 I-1; I-1; II,I,4 0-1; 0-1; 1,I,3
L4 0-1 0-0 I-1; I-1; II,I,3 0-1; 0-2;1,I,2
FIGURE 3 . Scottocheres species cosmopolitan distribution. 1, Antarctic Ocean; 2, Pincinguaba—Brazil; 3, California Reef, Abrolhos—Brazil; 4, Todos-os-Santos Bay—Brazil; 5, South West of Iceland; 6, Moray Firth—Scotland; 7, Banyuls—France; 8, Gulf of Naples—Italy; 9, Chik Chau—Hong Kong; 10, Japan Sea—South Korea; 11, Sellick Reef—Australia. TABLE 1 . Distribution and sponge hosts of Scottocheres species (data collected from the following references: Scott T and Scott A, 1894 ; Giesbrecht, 1897 , 1902; Hansen, 1923 ; Nicholls, 1944 ; Stock, 1967 ; Malt, 1991 ; Johnsson et al. , 2001 ; Johnsson, 2002 ).
Species Location Hosts
Moray Firth, Scotland Unknown host
Gulf of Naples, Italy ( Giesbrecht, 1897 ) Unknown host
Scottocheres elongatus (T. & A. Scott, 1894 ) Banyuls, France ( Stock, 1967 ) Ulosa digitata (Schmidt, 1866) , Dysidea tupha (Pallas, 1766) and Desmacella annexa Schmidt, 1870 ( Stock, 1967 )
Pincinguaba, Brazil ( Johnsson, 2001 ) Unknown host
Scottocheres gracilis Hansen, 1923 South West of Iceland Unknown host
Scottocheres latus Nicholls, 1944 Sellick Reef, Australia Unknown host
Banyuls, France Agelas oroides (Schmidt, 1864) and Hymeniacidon Bowerbank, 1858
Scottocheres laubieri Stock, 1967 Pincinguaba, Brazil ( Johnsson, 2001 ) Unknown sponge
California Reef, Abrolhos, Brazil ( Johnsson, 2002 ) Aplysina lacunosa , (Lamarck, 1814)
Scottocheres longifurca Giesbrecht, 1897 Gulf of Naples, Italy Unknown host
Scottocheres stocki Malt, 1991 Chik Chau, Hong Kong Ircinia Nardo, 1833
Scottocheres stylifer Giesbrecht, 1902 Antarctic Ocean Unknown host
Scottocheres youngi Johnsson, 2002 California Reef, Abrolhos, Brazil Monanchora Carter, 1883
Scottocheres mipoensis Kim, 2016 Japan Sea, South Korea Unknown sponge
Scottocheres spinoparva n. sp. Todos-os-Santos Bay, Brazil Callyspongia Duchassaing & Michelotti, 1864
Key to the species of Scottocheres : 1. Antennule 17-segmented............................................................................... 2 Antennule 18-segmented............................................................................... 5 Antennule 19-segmented............................................................................... 8 2. Third exopodal segment of leg 1 with three spines on outer margin.............................................. 3 Third exopodal segment of leg 1 with two spines on outer margin............................... S. spinoparva n. sp. 3. Maxillipedal endopod with formula 0,1,1+claw............................................................. 4 Maxillipedal endopod with formula 2,1,1+claw............................................ S. laubieri Stock, 1967 4. Caudal rami longer than wide ......................................................... S. gracilis Hansen, 1923 Caudal rami wider than long............................................. S. elongatus (Scott T. & Scott A., 1894) 5. 2-segmented antennal endopod.......................................................................... 6 3-segmented antennal endopod...................................................... S. youngi Johnsson, 2002 6. Exopod of the antenna with one setae................................................ S. stylifer Giesbrecht, 1902 Exopod of the antenna with more than one setae............................................................. 7 7. Exopod of the antenna with two setae.............................................. S. longifurca Giesbrecht, 1897 Exopod of the antenna with three setae.............................................. S. mipoensis Kim I.H., 2016 8. Second endopodal segment of leg 1 with one inner seta........................................ S. stocki Malt, 1991 Second endopodal segment of leg 1 with two inner setae..................................... S. latus Nicholls, 1944