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Hydroids (Cnidaria, Hydrozoa) from marine fouling assemblages in the Galápagos Islands, Ecuador

Hydroids (Cnidaria, Hydrozoa) from marine fouling assemblages in the Galápagos Islands, Ecuador
Hydroids (Cnidaria, Hydrozoa) from marine fouling assemblages in the Galápagos Islands, Ecuador
An account is given of hydroids collected in 2015 and 2016 from port and harbor fouling communities in the Galápagos Islands. Also included is the hydroid of Ectopleura media, discovered on the wreck of the tanker Jessica near Isla San Cristóbal in 2001. Among 20 species reported herein were six anthoathecates and 14 leptothecates. Most common in the samples were the kirchenpaueriid Ventromma halecioides and the halopteridid Halopteris alternata. Eight species (Bougainvillia muscus, Bimeria vestita, Clytia elongata, C. obliqua, C. thornelyi, Obelia oxydentata, Eucheilota sp., and Halecium labiatum) are reported for the first time from the Galápagos archipelago. Three of them (Clytia elongata, C. thornelyi, and Halecium labiatum) are also new to the eastern Pacific. Seven species treated here are considered introduced by shipping to the islands, bringing to eight the number of introduced hydroids. In addition, we treat four species as cryptogenic, bringing to five the total number of the latter in the Galápagos. The binomena Obelia thornelyi Nutting, 1927, Clytia stolonifera Blackburn, 1938, and C. latitheca Millard and Bouillon, 1973 are regarded as synonyms, with the first of these having nomenclatural priority. Meanwhile, the senior synonym O. thornelyi is reassigned to the genus Clytia Lamouroux, 1812 as C. thornelyi. Another species in the samples, Dynamena distans Lamouroux, 1816 (also widely known as Sertularia distans and Tridentata distans), is combined for the first time with the genus Amphisbetia L. Agassiz, 1862, as A. distans.
21-58
Calder, Dale
4a6bd5d0-d551-4673-a618-c287a4165198
Carlton, James T.
7ec3a03d-c4e5-44ce-844e-39ea96ba4079
Larson, Kristen
718118b6-d6b0-4584-a4c1-36463e3ab24b
Mallinson, Jennifer J
adcd0901-b055-4fe3-bd6b-56085851ba13
Choong, Henry H.C
9776634a-a1b4-4827-bee6-3a973b20c837
Keith, Inti
329d01c2-8e9b-451f-8191-5ddac03bf3b2
Ruiz, Gregory
638b70c5-42c3-46a5-8383-6345f543499c
Calder, Dale
4a6bd5d0-d551-4673-a618-c287a4165198
Carlton, James T.
7ec3a03d-c4e5-44ce-844e-39ea96ba4079
Larson, Kristen
718118b6-d6b0-4584-a4c1-36463e3ab24b
Mallinson, Jennifer J
adcd0901-b055-4fe3-bd6b-56085851ba13
Choong, Henry H.C
9776634a-a1b4-4827-bee6-3a973b20c837
Keith, Inti
329d01c2-8e9b-451f-8191-5ddac03bf3b2
Ruiz, Gregory
638b70c5-42c3-46a5-8383-6345f543499c

Calder, Dale, Carlton, James T., Larson, Kristen, Mallinson, Jennifer J, Choong, Henry H.C, Keith, Inti and Ruiz, Gregory (2019) Hydroids (Cnidaria, Hydrozoa) from marine fouling assemblages in the Galápagos Islands, Ecuador. Aquatic Invasions, 14 (1), 21-58. (doi:10.3391/ai.2019.14.1).

Record type: Article

Abstract

An account is given of hydroids collected in 2015 and 2016 from port and harbor fouling communities in the Galápagos Islands. Also included is the hydroid of Ectopleura media, discovered on the wreck of the tanker Jessica near Isla San Cristóbal in 2001. Among 20 species reported herein were six anthoathecates and 14 leptothecates. Most common in the samples were the kirchenpaueriid Ventromma halecioides and the halopteridid Halopteris alternata. Eight species (Bougainvillia muscus, Bimeria vestita, Clytia elongata, C. obliqua, C. thornelyi, Obelia oxydentata, Eucheilota sp., and Halecium labiatum) are reported for the first time from the Galápagos archipelago. Three of them (Clytia elongata, C. thornelyi, and Halecium labiatum) are also new to the eastern Pacific. Seven species treated here are considered introduced by shipping to the islands, bringing to eight the number of introduced hydroids. In addition, we treat four species as cryptogenic, bringing to five the total number of the latter in the Galápagos. The binomena Obelia thornelyi Nutting, 1927, Clytia stolonifera Blackburn, 1938, and C. latitheca Millard and Bouillon, 1973 are regarded as synonyms, with the first of these having nomenclatural priority. Meanwhile, the senior synonym O. thornelyi is reassigned to the genus Clytia Lamouroux, 1812 as C. thornelyi. Another species in the samples, Dynamena distans Lamouroux, 1816 (also widely known as Sertularia distans and Tridentata distans), is combined for the first time with the genus Amphisbetia L. Agassiz, 1862, as A. distans.

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Accepted/In Press date: 10 January 2019
Published date: 28 March 2019

Identifiers

Local EPrints ID: 430826
URI: https://eprints.soton.ac.uk/id/eprint/430826
PURE UUID: 1098be55-b5fe-424f-bfff-8dd2db844b08

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Date deposited: 15 May 2019 16:30
Last modified: 11 Nov 2019 17:35

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Contributors

Author: Dale Calder
Author: James T. Carlton
Author: Kristen Larson
Author: Jennifer J Mallinson
Author: Henry H.C Choong
Author: Inti Keith
Author: Gregory Ruiz

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