New species of Bairdioidea (Crustacea, Ostracoda) from the Southern Ocean and discussions on Bairdoppilata simplex (Brady, 1880),? Bairdoppilata labiata (Müller, 1908) and Bythopussella aculeata (Müller, 1908) * Author Brandão, Simone N. text Zootaxa 2008 1866 373 452 journal article 10.5281/zenodo.183820 287b1420-5c7c-4a05-ae95-e4c9121b51a6 1175­5326 183820 Bythopussella aculeata ( Müller, 1908 ) ( Figs. 43 , 45 .P–S) 1908 Anchistrocheles aculeata Müller : 100–102, Pl. 14.7–14, Pl. 15.1–5. 1969 non Anchistrocheles ? sp. aff. A. aculeata, Maddocks : 113, Fig. 60m . 1990 Anchistrocheles aculeata, Warne : 114. 1997 Anchistrocheles ? aculeata, Hartmann: 55, Fig. 16 . Material . Since B. aculeata is the type species of the genus Bythopussella , I prefer not to designate a lectotype for B. aculeata , because the 5 adult specimens available are in very bad conditions (fragmented soft parts and valves). I think that the designation of a lectotype should be done when new material (in good condition) is available. The syntype series of B. aculeata includes one glass containing specimens in alcohol and labelled “ Anchistrocheles aculeata Müller, Gauss­Station , 385m , Deut. Südpolar Exp., 1902­1903 , ZMB 13086”: 1) This vial contained seven juveniles with completely decalcified valves – 6 (A­1), 1 (A­2). Additionally, four glass slides with dissected specimens and valves also form part of Müller’s syntype series: 2) Glass slide with permanent medium containing appendages, 1 RV and pieces of LV of 1 A F, and labelled “ Anchistrocheles aculeata , 1649 , Gauss., 177b female, 11.02”. 3) Glass slide with permanent medium containing very fragmented appendages, 1 RV and pieces of LV of 1 A M, and labelled “ Anchistrocheles aculeata , 1652 , Gauss., 177b male, 12.02”. 4) Glass slide with permanent medium containing very fragmented appendages, 1 RV and pieces of LV of 1 A M, and labelled “ Anchistrocheles aculeata , 1662 , Gauss., 177b male, 12.02”. 5) Glass slide with permanent medium containing fragmented appendages, 1 LV and pieces of RV of 1 juvenile ?, plus one RLV positioned in dorsal view, and labelled “ Anchistrocheles aculeata , 1677 , Gauss., 177b, 1.03”. Other specimens studied herein were in the vial of the types of Bairdoppilata labiata ( ZMB 13069): 6) 1 A M (dissected by myself, SNB 0687), and 1 (A­2) were previously together with the type series of Bairdoppilta labiata ( Müller, 1908 ) , in the vial labelled “ Nesidea labiata G. W. Müller, Gaus Station (177a), 385m , Deut. Südpolar Exp., 1901­1903 , ZMB 13069, 177a ­ 12.02”. The adult male specimen is herein illustrated ( Fig. 45 .P–S); 7) 1 (A­2) in vial labelled were previously together with the type series of Bairdoppilta labiata ( Müller, 1908 ) , in the vial labelled “ Nesidea labiata G. W. Müller, Gaus Station (177a), 385m , Deut. Südpolar Exp., 1901­1903 , ZMB 13069, 177a – 1.03”. Distribution. Only known from the type locality, Southern Ocean (Indic Sector), 385m . Measurements. Syntypes : LV, A M (SNB 0657) L 0.94mm , H 0.54mm ; (A­1) L 0.84mm , H 0.48mm ; (A­ 2) L 0.63mm , H 0.40mm . Diagnosis . Valves fairly large, bairdiid in aspect, with conspicuous lateral punctation in the central area of lateral surface (anterior and posterior are smooth); both valves with small spines on anterior margin; LV with 1 medium­sized spine on posterior margin. AII with elongate, slender podomeres; podomere VI with 1 long claw, and 1 medium­sized and 1 small setae in males and females. MxI with 7 strahlen. ApV robust. Podomere V of ApV to VII with 1 long terminal claw, and one vestigial seta. Fu with 1 large and 1 mediumsized claws, and 2 medium­sized setae. Genital lobe subcircular with short, internal tube. Hemipenis with elongated/sub­hemispherical basal capsule, which presents a beaked­shaped distal part; short, fairly straight copulatory tube, and one rigid, chitinized, short, medial process. Remarks. Details in chaetotaxy could not be studied in B. aculeata since all adults dissected and are preserved in a large quantity of permanent medium, which impedes their observation under the larger microscope objective magnification (100X).