WoRMS source details

Lindsay, D. J.; Grossmann, M. M.; Montenegro, J.; Morandini, A. C. (2023). A new subfamily of ulmarid scyphomedusae, the Santjordiinae, with a description of Santjordia pagesi gen. et sp. nov. (Cnidaria: Scyphozoa: Discomedusae: Semaeostomeae: Ulmaridae) from the Sumisu Caldera, Ogasawara Islands, Japan. Zootaxa. 5374(4): 533-551.
473840
10.11646/zootaxa.5374.4.5 [view]
Lindsay, D. J.; Grossmann, M. M.; Montenegro, J.; Morandini, A. C.
2023
A new subfamily of ulmarid scyphomedusae, the Santjordiinae, with a description of Santjordia pagesi gen. et sp. nov. (Cnidaria: Scyphozoa: Discomedusae: Semaeostomeae: Ulmaridae) from the Sumisu Caldera, Ogasawara Islands, Japan
Zootaxa
5374(4): 533-551
Publication
An undescribed species of ulmarid medusa was observed in situ and captured at 812 m depth within the Sumisu Caldera, Ogasawara Islands, Japan. Morphological and molecular evidence points to it being distinct from other ulmarid medusae and a new species (pagesi), genus (Santjordia) and subfamily (Santjordiinae) are herein erected to contain it. This new subfamily of semaeostome ulmarid medusae has both marginal and subumbrellar rhopalia, making it unique within the order Semaeostomeae. Although the combination of subumbrellar tentacles and the lack of branched canals should warrant the erection of a new family within the Semaeostomeae, a lack of information on the gonad structure and poor bootstrap support in the molecular phylogenetic tree cause us to relegate it to the catch-all family Ulmaridae, until greater taxon sampling and phylogenetic analyses are carried out for the Semaeostomeae.
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2023-11-22 00:38:08Z
created

Nontype NSMT NSMT-Co1404, geounit Japan Trench, identified as Deepstaria enigmatica Russell, 1967
Nontype NSMT NSMT-Co1405, geounit Japan Trench, identified as Tiburonia granrojo Matsumoto, Raskoff & Lindsay, 2003
Holotype NSMT NSMT-Co-1800, geounit Ogasawara Islands, identified as Santjordia pagesi Lindsay, Grossmann, Montenegro & Morandini, 2023
Nontype UM12_RMT200_Dg, geounit Southern Ocean, identified as Desmonema glaciale Larson, 1986
Nontype UM25_RMT-S-8-2_Da, geounit Southern Ocean, identified as Diplulmaris antarctica Maas, 1908
Japanese セキジュウジクラゲ for Santjordia pagesi Lindsay, Grossmann, Montenegro & Morandini, 2023


 Etymology

The species name is in honour of Dr. Francesc Pagès, who hosted the first author during his sabbatical in ... [details]

 Holotype

Umbrella hemispherical; 100 mm diameter, 72 mm height; scattered with nematocysts; mesoglea thick, transparent. ... [details]

 Phylogeny

The analysis of sequences of the mitochondrial 16S gene using maximum likelihood (ML) and Bayesian methods gave ... [details]

 Taxonomy

Santjordiinae with bell margin divided into 8 broad velar lobes; subumbrellar tentacles in pits over ring canal ... [details]

 Taxonomy

Ulmaridae in which the tentacles arise in linear clusters from the subumbrella; without subgenital pits; marginal ... [details]