A new species of Heterospio (Annelida, Longosomatidae) from the Indian Ocean Author Parapar, Julio CE188F30-C9B0-44B1-8098-402D2A2F9BA5 Departamento de Bioloxía Animal, Bioloxía Vexetal e Ecoloxía, Facultade de Ciencias, Universidade da Coruña, Rúa da Fraga 10, E- 15008 A Coruña, Spain. & urn: lsid: zoobank. org: author: CE 188 F 30 - C 9 B 0 - 44 B 1 - 8098 - 402 D 2 A 2 F 9 BA 5 & Corresponding author: jparapar @ udc. es jparapar@udc.es Author Vijapure, Tejal 27F44E0B-3479-4F32-90C7-4E58AD1EF0F5 CSIR-National Institute of Oceanography (NIO), Regional Centre, Mumbai, India. & Email: tejaalvijapure @ gmail. com & urn: lsid: zoobank. org: author: 27 F 44 E 0 B- 3479 - 4 F 32 - 90 C 7 - 4 E 58 AD 1 EF 0 F 5 tejaalvijapure@gmail.com Author Moreira, Juan B1E38B9B-7751-46E0-BEFD-7C77F7BBBEF0 Departamento de Biología (Zoología), Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, E- 28049 Madrid, Spain. & Email: juan. moreira @ uam. es & urn: lsid: zoobank. org: author: B 1 E 38 B 9 B- 7751 - 46 E 0 - BEFD- 7 C 77 F 7 BBBEF 0 juan.moreira@uam.es Author Sukumaran, Soniya 44610EDC-9965-40FC-AC41-4BB30DB9A85B CSIR-National Institute of Oceanography (NIO), Regional Centre, Mumbai, India. & Email: soniya @ nio. org & urn: lsid: zoobank. org: author: 44610 EDC- 9965 - 40 FC-AC 41 - 4 BB 30 DB 9 A 85 B soniya@nio.org Author Csir-N, Spain. text European Journal of Taxonomy 2016 2016-08-09 220 1 17 journal article 21894 10.5852/ejt.2016.220 03584cef-aa44-471a-a887-539b9a4e868a 2118-9773 3840250 87A7BD95-16DC-4219-B0D8-5F46F18F5EF9 Genus Heterospio Ehlers, 1874 Type species Heterospio longissima Ehlers, 1874 . Diagnosis (modified from Borowski 1994 ) Body elongated, linear, divided in three regions. Anterior region with 6̅8 short chaetigers; median region with greatly elongated segments; posterior region with few short, inflated segments. Posterior part of prostomium with a pair of lateral nuchal organs. Proboscis eversible, epithelial pouch. One pair of grooved peristomial palps, easily lost, leaving scars on lateral surfaces. Anterior region with 3–8 pairs of cirriform branchiae, usually very long, one pair per segment, arising above notopodia, beginning from chaetiger 2. Anterior region with biramous parapodia provided with simple capillaries, with or without acicular spines; elongated segments with chaetae usually forming a cincture near anterior margin; chaetae simple capillaries, may be accompanied by subuluncini, aristae chaetae, and acicular spines; posteriormost inflated chaetigers provided with strong acicular hooks. Remarks Following Parapar et al. (2014) , the terms “thorax” and “abdomen” are not used in the diagnosis due to the lack of a clear criterion about their limits. The presence of nuchal organs on the prostomium was included in the diagnosis. The range of 7̅9 short anterior chaetigers provided by Borowski (1994) is modified to 6̅8, following Parapar et al. (2014) . Peristomial palps were qualified as “easily deciduous” because they are not reported in most descriptions. More details are provided about the number (range) and size of branchiae. The term “parapodia biramous” is used here only for anterior segments; it is also highlighted that in elongated segments there may be a change in the arrangement of chaetae, i.e., forming cinctures, although those seem not be present in H. longissima Ehlers, 1874 sensu stricto , H. reducta Laubier, Picard & Ramos, 1973 or H. angolana Bochert & Zettler, 2009 .