Eutonina scintillans (Bigelow, 1909)

Eutonina scintillans (Bigelow, 1909) View in CoL

Eutimalphes scintillans (Bigelow, 1909) View in CoL .

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 GoogleMaps

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 GoogleMaps

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 View Figure 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 View Figure 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.