New records of benthic hydroids (Cnidaria: Hydrozoa) from the coast of Oaxaca, Mexico

Humara‐Gil, Karla J.; Cruz-Gómez, Christopher

doi:10.11646/zootaxa.4455.3.3

“…The gonosome of this hydroid has nevertheless been reported infrequently. Gonothecae observed here were similar to those described by Vervoort (1959, as S. turbinata), Millard (1975, as S. turbinata), Hirohito (1995, Ferry (2015, as S. turbinata), andHumara-Gil &Cruz Gomez (2018). In being barrel-shaped with transverse ridges and a large distal orifice, they resemble those occurring in a group of related species including T. marginata (Kirchenpauer, 1864), T. tumida (Allman, 1877), T. rugosissima (Thornely, 1904), and T. perpusilla (Stechow, 1919).…”

Section: Tridentata Turbinata (Lamouroux 1816) Figs 6h Isupporting

confidence: 87%

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2020

Zootaxa

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This report is based on a small collection of hydroids from the Hawaiian Islands, in the central Pacific Ocean. Most of the examined material was obtained by staff of the Bernice Pauahi Bishop Museum, Honolulu, during surveys for nonindigenous marine species in shallow, sheltered, inshore or nearshore waters, and especially in harbours, bays, and lagoons. In all, 34 species of leptothecate hydroids, assigned to 14 families and 20 genera, were identified and are discussed. One of them, based on a single infertile colony with a damaged hydrotheca, was identified provisionally only to the rank of suborder. Given the limited geographic and bathymetric focus of the surveys, only four of the species, Clytia thornelyi, Halecium sibogae, Macrorhynchia balei, and M. hawaiensis, were collected at depths greater than 25 m. Seven species,

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“…The gonosome of this hydroid has nevertheless been reported infrequently. Gonothecae observed here were similar to those described by Vervoort (1959, as S. turbinata), Millard (1975, as S. turbinata), Hirohito (1995, as S. turbinata), Ferry (2015, as S. turbinata), andHumara-Gil &Cruz Gomez (2018). In being barrel-shaped with transverse ridges and a large distal orifice, they resemble those occurring in a group of related species including T. marginata (Kirchenpauer, 1864), T. tumida (Allman, 1877), T. rugosissima (Thornely, 1904), and T. perpusilla (Stechow, 1919).…”

Section: Tridentata Turbinata (Lamouroux 1816) Figs 6h Isupporting

confidence: 87%

Some leptothecate hydroids (Cnidaria, Hydrozoa) from Hawaii, mostly from inshore and nearshore waters

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2020

Zootaxa

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This report is based on a small collection of hydroids from the Hawaiian Islands, in the central Pacific Ocean. Most of the examined material was obtained by staff of the Bernice Pauahi Bishop Museum, Honolulu, during surveys for nonindigenous marine species in shallow, sheltered, inshore or nearshore waters, and especially in harbours, bays, and lagoons. In all, 34 species of leptothecate hydroids, assigned to 14 families and 20 genera, were identified and are discussed. One of them, based on a single infertile colony with a damaged hydrotheca, was identified provisionally only to the rank of suborder. Given the limited geographic and bathymetric focus of the surveys, only four of the species, Clytia thornelyi, Halecium sibogae, Macrorhynchia balei, and M. hawaiensis, were collected at depths greater than 25 m. Seven species, Cirrholovenia tetranema Kramp, 1959, Orthopyxis crenata (Hartlaub, 1901), Clytia elongata Marktanner-Turneretscher, 1890, C. paulensis (Vanhöffen, 1910), Tridentata maldivensis (Borradaile, 1905), Monotheca flexuosa (Bale, 1894), and a hydroid identified only as Eirenida (undetermined), are recorded from Hawaii for the first time. Three others, Lytocarpia nigra (Nutting, 1905) Macrorhynchia balei (Nutting, 1905), and M. hawaiensis (Nutting, 1905), have their type localities in Hawaii, with the last of these being known to date only from the Hawaiian archipelago. Most of the species are well-known from shallow water areas across the tropical and subtropical Indo-Pacific region, and over half of them have been reported as well from warm waters in the Atlantic Ocean. Their existence in the remote islands of Hawaii is attributed to long-range dispersal by both natural and human-mediated means, including shipping.

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“…Only S. tubulosa and B. muscus have been reported in other coastal lagoons from southern Gulf of Mexico (Mendoza-Becerril et al, 2009;Cortés-Lacomba et al, 2013). genic because of its multiple records around the world (Humara-Gil & Cruz-Gómez, 2018).This is a genus with a worldwide distribution and frequently related to coastal zones (Nagata et al, 2014).…”

Section: Discussionmentioning

confidence: 99%