On the taxonomic status of Holothuria (Holothuria) tubulosa (s. s.) from the Algerian coast with the description of a new Mediterranean species, Holothuria (Holothuria) algeriensis n. sp. (Echinodermata: Holothuroidea: Holothuriidae) Mezali, Karim Thandar, Ahmed S. Khodja, Ihcene Zootaxa 2021 2021-06-03 4981 1 89 106 Koehler & Vaney, 1906 Koehler & Vaney 1906 [151,915,654,681] Holothuroidea Holothuriidae Holothuria Animalia Aspidochirotida 7 96 Echinodermata species arguinensis Roweothuria   Figure 4B, Table 4   Material examined.  CMNI 2021 –0194, Salamandre, Algeria, 35°55.221’N, 0°03.470’E,  2 m,  November 2014, 1 spec. LPVCMRMS2020.207, Ouillis, Algeria, 36°7.436’N, 0°15.219’E,  5 m,  June 2020, 2 specs.   Description.Semi-cylindrical body with dorsal surface ( Figure 4Ba) arched, dark brown in color; ventral surface ( Figure 4Bb) sole-like, light brown in color. Several large protuberances in two double rows on the dorsal surface; in addition, dorsal and ventral surfaces separated by several arched protuberances. Anus terminal. Mouth surrounded by 20 tentacles. Cuvierian tubules absent. Collar around mouth thick (about 4.60 mm). Calcareous ring with broad, squarish, radial plates with a shallow anterior notch, almost flat anterior portions and slightly concave posterior margin ( Table 4).  Ossicles.Body wall tables ( Figure 4Bc) sometimes with a rectangular disc, spire of straight to slightly arched pillars, parallel to each other. Buttons often shaped in the figure of “8” ( Figure 4Bd) with rough, irregular and prickly margins but with a smooth surface with unequally-sized perforations. Pedicels also with numerous elongated perforated plates ( Figure 4Be) and other rare enlarged plates. Rods of tentacles larger and more complex with an enlarged, branched and perforated middle region, arched ( Figure 4Bf) or straight ( Figure 4Bg). 3311811309 2014-11 2020-06 2014-11 CMNI Algeria 2 36.12393 Salamandre 1 0.25365 Ouillis 7 96 CMNI 2021-0194 1 3311811305 [215,1232,798,825] 2014-11 2020-06 2014-11 CMNI Algeria 2 36.12393 Salamandre 1 0.25365 Ouillis 7 96 CMNI 2021-0194 1