Examination of polychaete specimens from Haifa Bay (Israel, eastern Mediterranean Sea) revealed several individuals exhibiting morphological characteristics similar to Sphaerosyllis hystrix Claparède, 1863. A detailed morphometrical analysis of the Israeli specimens in comparison to specimens of S. hystrix and S. boeroi Musco, Çinar & Giangrande, 2005 supported the description of the former as a new species, S. levantina sp. n. Individuals of S. hystrix formed a very heterogeneous group with strong character vari- ations in the analysis and the presumed cosmopolitan distribution of the species is discussed based on literature records.
Faulwetter, S., Chatzigeorgiou, G., Galil, B. S., Nicolaidou, A., & Arvanitidis, C. (2011). Sphaerosyllis levantina sp. n. (annelida) from the Eastern Mediterranean, with notes on character variation in sphaerosyllis hystrix claparède, 1863. ZooKeys, 150, 327–345. https://doi.org/10.3897/zookeys.150.1877