Hemicyclopora admirabilis, Ramalho & Rodríguez-Aporta & Gofas, 2022
publication ID |
https://doi.org/ 10.11646/zootaxa.5094.1.2 |
publication LSID |
lsid:zoobank.org:pub:EBF67241-D93F-48CD-9548-463F0B0A9D47 |
DOI |
https://doi.org/10.5281/zenodo.6301230 |
persistent identifier |
https://treatment.plazi.org/id/8F73297C-9EBB-4554-AC4C-232377E154A3 |
taxon LSID |
lsid:zoobank.org:act:8F73297C-9EBB-4554-AC4C-232377E154A3 |
treatment provided by |
Plazi |
scientific name |
Hemicyclopora admirabilis |
status |
sp. nov. |
Hemicyclopora admirabilis n. sp.
( Fig. 10 View FIGURE 10 )
urn:lsid:zoobank.org:act:8F73297C-9EBB-4554-AC4C-232377E154A3
Material examined. Holotype: MNCN 25.03 About MNCN /4307: BV12, 112– 120 m; coll. UMA; one living colony encrusting the bryozoan Adeonellopsis distoma . Paratypes: MNCN 25.03 About MNCN /4308: BV12, 112– 120 m; coll . UMA; one living colony encrusting A. distoma .
Etymology. From the Latin admirabilis , - e, meaning admirable and referring to the beauty of this species.
Diagnosis. Colony encrusting, unilaminar. Autozooids with one row of areolar pores (additional rows near the orifice), and granular frontal shield; orbicular orifice with eight oral spines in autozooids and six in ovicellate zooids. Ovicell produced by a distal kenozooid, ooecium globular, surface finely granular.
Description. Colony encrusting, unilaminar ( Fig. 10A View FIGURE 10 ). Zooids longer than wide [L 557–647–727 (N 10, SD 66), W 444–471–524 μm (N 10, SD 26)], arranged irregularly ( Fig. 10A, B View FIGURE 10 ). Frontal wall convex, finely granular, imperforate, except for one row of areolar pores with additional rows proximo-lateral to the orifice ( Fig. 10A–C View FIGURE 10 ). Orifice orbicular [L 133–151–163 (N 6, SD 10), W 137–149–164 μm (N 10, SD 8)] with concave proximal border ( Fig. 10D View FIGURE 10 ), rounded triangular condyles and short disto-lateral peristome (never developed proximally) bearing eight articulate, stout spines (six in ovicellate zooids) ( Fig. 10A–D View FIGURE 10 ). Ovicell globular, wider than long [L 205–209– 217 (N 3, SD 6), W 245–272–296 μm (N 3, SD 25)], ooecial surface imperforate and finely granular as the frontal shield ( Fig. 10A–C View FIGURE 10 ). Ancestrula not observed.
Remarks. Seventeen Hemicyclopora species are known worldwide, including four Mediterranean species: H. multispinata ( Busk, 1861) , H. collarina Canu & Lecointre, 1930 , H. discrepans ( Jullien & Calvet, 1903) , and H. dentata López de la Cuadra & García-Gómez, 1991 . The latter two species were recorded in the Alboran Sea: H. dentata , collected in the Strait of Gibraltar at 50–60 m depth, lacks oral spines (López de la Cuadra & García- Gómez 1991), and H. discrepans from the Alboran platform, collected at 170 m ( Harmelin & d’Hondt 1992a), shows eight oral spines in both fertile and infertile zooids, a straight or shallow concave proximal edge of the orifice, and conspicuous triangular condyles; zooids are slightly larger (L 720 x W 500 μm), with a smaller orifice (L 132 x W 127 μm), and larger ovicells (L 220 x W 320 μm) ( Reverter-Gil & Fernández-Pulpeiro 1999). Hemicyclopora collarina , originally described from Miocene sediments of northwestern France and subsequently found living in a cave of the French Mediterranean ( Harmelin 2003), has six oral spines (four in fertile zooids), a triangular suboral projection, lacks condyles and lyrula and, according to López de la Cuadra & García-Gómez (1991), the ovicell is closed by a special operculum. Based on this latter character, Ryland (1963) mentioned that H. collarina may be misplaced in Hemicyclopora .
The most similar to the new species is H. multispinata , which was described from Madeira, North Africa (deep water), the Gulf of Cadiz, and was also recorded from Mediterranean waters off France ( Busk 1861; Cook 1968; Zabala & Maluquer 1988; López de la Cuadra & García-Gómez 1994; Rosso & Di Martino 2016; Ramalho et al. 2020b). As the Alboran specimens, it has eight oral spines in non-ovicellate and six in ovicellate zooids, but differs in having a prominent proximal lip forming a triangular projection below the orifice. Berning (2006) studied the Miocene fauna from Niebla (late Tortonian, Spain) and found a tiny colony, which he left in open nomenclature as Hemicyclopora sp. 1 , due to the absence of ovicells and the poor preservation This tiny colony shows a similar orifice shape, lacks the suboral projections, has eight spines in autozooids, as well as two rows of marginal areolar and additional ones proximo-lateral to the orifice. Unfortunately, we cannot confirm that it is conspecific with the new species due to the absence of ovicells.
UMA |
University of Massachusetts, Museum of Zoology |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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