Pelagic tunicates (Appendicularia and Thaliacea) of Sri Lanka: two first records with an annotated checklist Author Karunarathne, Krishan D. 0000-0003-1780-9749 Department of Aquaculture and Fisheries, Faculty of Livestock, Fisheries and Nutrition, Wayamba University of Sri Lanka, Makandura, Gonawila, 60170, Sri Lanka. & krishankarunarathne @ gmail. com; krishan. dk @ wyb. ac. lk; https: // orcid. org / 0000 - 0003 - 1780 - 9749 krishankarunarathne@gmail.com Author Croos, M. D. S. T. De 0000-0003-4449-6573 Department of Aquaculture and Fisheries, Faculty of Livestock, Fisheries and Nutrition, Wayamba University of Sri Lanka, Makandura, Gonawila, 60170, Sri Lanka. & dileepa _ dc @ yahoo. com; dileepad @ wyb. ac. lk; https: // orcid. org / 0000 - 0003 - 4449 - 6573 dileepa_dc@yahoo.com text Zootaxa 2021 2021-11-11 5067 3 352 376 journal article 3575 10.11646/zootaxa.5067.3.2 9b8d33b9-c9df-4f9d-abeb-de1c7b84f3e0 1175-5326 5681899 AF3DF45F-B248-4BDD-904F-F55D735DC867 Oikopleura longicauda ( Vogt, 1854 ) Appendicularia longicauda Vogt 1854: 74 , Pl. 10 Figs. 4 –6. Oikopleura spissa Fol 1872: 470–471 , Pl. 2 Fig. 8, Pl. 3 Figs. 1–4 . Lohmann 1896: 59 . Oikopleura (Coecaria) longicauda : Tokioka 1960: 354 . Oikopleura longicauda : Lohmann 1896: 59 , Pls. 9, 10 Fig. 7. Bückmann 1969: 5 , Fig. 8a–c. Fenaux 1993: 58 , 71, 79; 1998: 300, 301. Aravena & Palma 2002: 312 , Fig. 4A . Material examined. Ten specimens ( MDAFWU 2020 /401–410), St .205, January 2020 . Description. Trunk 1–1.5 mm long, compact. Strongly developed velum extending dorsally over the trunk. Mouth with a long lower lip without oral glands. Left lobe of the stomach with a small finger-shaped postcardial caecum directed upwards. Rectum extending slightly beyond the oral wall of the stomach. Gonads adjoining the coil of the gut, and embracing it laterally in mature individuals; the ovary is placed above the testis. Tail musculature broad and the subchordal cells absent. Global distribution. The Antarctic Ocean, Atlantic Ocean, Indian Ocean, Pacific Ocean, the Mediterranean Sea and Red Sea ( Fenaux et al . 1998 ); Australian waters ( Thompson 1948 ). Type locality: off Nice, Mediterranean Sea.