New undescribed species record for Gulf of Mexico, based on specimens from USNM 79399, 88117, 88118, 88121, 88123, 88126-88130, 88132, 88133, 88137 examined by J. Pilger; distinctive palmate projections on proboscis near base and on trunk, internal organs not always visible; possibly Anelassorhynchus sp.; Fisher (1946: 222) challenged genus suggesting that projections on base of proboscis cited to establish genus may be adaptations to extreme environments, if true, this species is found in near-shore environments and may experience potential estuarine conditions caused by lateral transport of fresh water emerging from the Mississippi Delta.
Added keyword "endemic to Gulf of Mexico"
Pilger, J. F. 2009. Echiura of the Gulf of Mexico, Pp. 797–802 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
Harte Research Institute for Gulf of Mexico Studies. 2016. GulfBase: Resource Database for Gulf of Mexico Research, Education, and Management. Texas A&M University-Corpus Christi. World Wide Web electronic publication. http://www.gulfbase.org, 10-16-2019.