Eutonina scintillans
Creators: name: Llorente-Vega, Jorge L
name: Cedeño-Posso, Cristina
name: Quirós-Rodríguez, Jorge A.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Cnidaria
Hydrozoa
Leptothecata
Eirenidae
Eutonina
Eutonina scintillans

description: Eutonina scintillans (Bigelow, 1909)
Eutimalphes scintillans (Bigelow, 1909).
Materials
Type status: Other material. Occurrence: individualCount: 2; occurrenceID: 8F1FF918-C383-5C5C-A489-AE0902C265B6; Taxon: kingdom: Animalia; phylum: Cnidaria; class: Hydrozoa; order: Leptothecata; family: Eirenidae; genus: Eutonina; Location: country: Colombia; stateProvince: Córdoba; municipality: San antero; locality: E 4; verbatimDepth: 0.5-3 m; verbatimCoordinates: 9°24'55.02"N, 75°46'25.32"W; Event: eventDate: 19-05-2024; Record Level: collectionCode: LZUC-CD. C-0104
Type status: Other material. Occurrence: individualCount: 1; occurrenceID: A32585A0-8ED0-5FF5-9160-FF22245A95B2; Location: country: Colombia; stateProvince: Córdoba; municipality: San antero; locality: E 6; verbatimDepth: 0.5-3 m; verbatimCoordinates: 9°26'52.79"N, 75°43'51.47"W; Event: eventDate: 02-04-2024
Description
Umbrella 1.1-2.7 mm in height and 1.1-2.3 mm in width; mesoglea thick; peduncle short and manubrium globose; mouth with four crenulated lips; four subumbrellar gonads occupying one-fourth of the radial canals, separate from the peduncle; velum narrow; 16 marginal tentacles with conical basal bulbs; eight closed statocysts, two per quadrant; no cirri or marginal warts (Fig. 4).
Diagnosis
Short peduncle; globular manubrium; mouth with simple or crenulated lips; four subumbrellar gonads located in the distal portion of the radial canals; 12 to 30 marginal tentacles; eight closed statocysts; no cirri or marginal warts (Bigelow 1909, Goy 1979, Bouillon 1999, Bouillon et al. 2004, Rodríguez et al. 2007).
Distribution
Atlantic Ocean (Goy 1979, Migotto et al. 2002, Rodríguez et al. 2007, Genzano et al. 2008, Oliveira et al. 2016, Ríos 2018); Pacific Ocean, in Mexico and Ecuador (Kramp 1961, Segura-Puertas et al. 2003, Andrade 2019 b, Andrade 2021); Mediterranean, Adriatic and Red Seas, as well as on the east coast of Africa (Kramp 1968, Bouillon et al. 2004, Thibault-Botha et al. 2013) (See Fig. 5).
Taxon discussion
The average size of the analysed specimens (1.3 mm in height and 2.8 mm in diameter) is smaller than that reported by other authors (5–10 mm in height and width), such as Kramp (1961), Bouillon (1999) and Rodríguez et al. (2007), but similar to that documented by Goy (1979). Additionally, each specimen contains 16 marginal tentacles, consistent with the findings of Rodríguez et al. (2007). Based on the high degree of morphological plasticity of the species, Goy (1979) identified three common characteristics present in all descriptions of E. scintillans, all of which were observed in the specimens examined.
description: Published as part of Llorente-Vega, Jorge L, Cedeño-Posso, Cristina & Quirós-Rodríguez, Jorge A., 2025, First record of two Leptothecata medusae (Cnidaria, Hydrozoa) in Colombia with annotations on their distribution and ecology, pp. e 138523 in Biodiversity Data Journal 13 on page e138523, DOI: 10.3897/BDJ.13.e138523