Serratotantulus chertoprudae gen. et sp. n. (Crustacea, Tantulocarida, Basipodellidae): A new tantulocaridan from the abyssal depths of the Indian Ocean

Abstract

A single tantulus larva was found at the abyssal depth of the Indian Ocean attached to a harpacticoid host of the family Cletodidae. It represents a new genus and species of Tantulocarida, family Basipodellidae. Its ultrastructure was studied with SEM. This genus can be easily distinguished from the other genera of Basipodellidae by the pore pattern, bilobed oral disk with strong longitudinal ridges and the posterior projection of the cephalic shield. A morphological analysis of two related families Basipodellidae and Deothertridae shows that they represent polyphyletic taxa and need further revision.

Diversity and abnormalities of cyclopoid copepods around hydrothermal vent fluids, Kueishantao Island, north-eastern Taiwan

“…), transported to these toxic environments by the Kuroshio water current, may be exposed to toxic levels of metal concentration and gases. These toxic chemicals as well as high temperature and low pH weaken their Downloaded by [University of Nebraska, Lincoln] at 18:44 03 April 2015 exoskeleton (Omair et al 1999;Burd and Thomson 1994;Bhandare and Ingole 2008), thus increasing susceptibility to ectoparasite infestation, which leads to the formation of TLAs (Sewell 1951;Boxshall 1988;Ohtsuka et al 2004;Savchenko and Kolbasov 2009). According to Chatton (1920), dinoflagellates of the genus Blastodinium are known to infect marine copepods, and the site of infection is visible as a protuberance that persists even after the parasite has left the host (Skovgaard 2004).…”

“…Copepods have been able to colonize extreme aquatic habitats such as deep-ocean trenches and active hydrothermal vents (Hourdez et al 2000;Dahms and Hwang 2012). These crustaceans are hosts of several parasites such as ciliates, tantulocarids and ellobiopsid ectoparasites (Sewell 1951;Boxshall 1988;Ohtsuka et al 2004;Savchenko and Kolbasov 2009), forming abnormal protuberances on their carapace, generically known as tumour-like anomalies (TLA) (Silina and Khudolei 1994;Manca et al 1996;Messick et al 2004;Skovgaard 2004) possibly increasing copepod mortality (Buttino et al 2011). Ciliates are probably the most frequent parasites related to TLA but tantulocarids have been revealed as a frequent parasite (Savchenko and Kolbasov 2009) among different groups of free-living copepods.…”

Tantulocarida versus Thecostraca: inside or outside? First attempts to resolve phylogenetic position of Tantulocarida using gene sequences

“…A settled tantulus larva of Serratotantulus chertoprudae Savchenko and Kolbasov , cypris larva of lepadid barnacle Conchoderma virgatum (Spengler, 1790) and y‐cypris larva of Hansenocaris itoi Kolbasov and Høeg, 2003 were processed for scanning electron microscopy. They were postfixed in 2% OsO 4 , dehydrated in a graded ethanol series and acetone, and critical point dried in CO 2 .…”

“…1b,c) and on the cephalothorax in males (Fig. 5b,c), (Savchenko and Kolbasov 2009;Kolbasov and Savchenko 2010;Petrunina and Kolbasov 2012). Accepting an in-group position of the Tantulocarida within the Thecostraca would therefore entail that these otherwise virtually omnipresent organs have been secondarily lost.…”

Tantulocarida (Crustacea) from the Southern Ocean deep sea, and the description of three new species of Tantulacus Huys, Andersen & Kristensen, 1992

“…Huys, 1990a;Huys et al, 1992a, b;Ohtsuka & Boxshall, 1998), but there are also some records from the Mediterranean (Bonnier, 1903;Huys, 1989Huys, , 1991, the North Sea (Greve, 1965;Huys & Boxshall, 1988;Boxshall & Vader, 1993) and the White Sea (Kornev et al 2004;Kolbasov et al, 2008;Kolbasov & Savchenko, 2010), and a few from the Southern and Indian Oceans (Grygier & Sieg, 1988;Savchenko & Kolbasov, 2009). This indicates a worldwide distribution of the group.…”