Reptadeonella cucullata, Almeida, Ana C. S., Souza, Facelucia B. C., Sanner, Joann & Vieira, Leandro M., 2015

Almeida, Ana C. S., Souza, Facelucia B. C., Sanner, Joann & Vieira, Leandro M., 2015, Taxonomy of recent Adeonidae (Bryozoa, Cheilostomata) from Brazil, with the description of four new species, Zootaxa 4013 (3), pp. 348-368 : 361

publication ID

https://doi.org/ 10.11646/zootaxa.4013.3.2

publication LSID

lsid:zoobank.org:pub:C0B220BE-ADD6-4D07-B416-F849D96DCFA6

DOI

https://doi.org/10.5281/zenodo.3512090

persistent identifier

https://treatment.plazi.org/id/2E6D015C-FFBC-8769-FF5F-DFBC4C95D998

treatment provided by

Plazi

scientific name

Reptadeonella cucullata
status

sp. nov.

Reptadeonella cucullata n. sp.

( Figs 29–32 View FIGURES 29 – 32 ; 41, Table 1 View TABLE 1 )

Adeona violacea: Marcus 1949: 24 (in part), figs 35–36. [ Brazil: Espírito Santo] Reptadeonella violacea: Vieira et al. 2008: 24 View in CoL (in part). [checklist]

Not Lepralia violacea Johnston, 1847: 325 , pl. 57, fig. 9. [British Isles]

Reptadeonella View in CoL sp.: Almeida et al. 2015: 4 View Cited Treatment (in part) [ Brazil: Bahia; checklist]

Material examined. Holotype: UFBA 637, Caravelas, Bahia, Brazil, 16º24' S, 38º18' W, 80 m, coll. April 1996 by Revizee Central. Paratypes: UFBA 689, Camamu, Barra Grande, Bahia, Brazil, 13º45' S, 38º50' W, 30 m, coll. January 2004; UFBA 431, Banco Vitória, Espírito Santo, Brazil, 20º33' S, 38º03' W, 60 m, coll. April 1996 by Revizee Central; UFBA 990, UFBA 1045, Camaçari, Bahia, Brazil, 12°35'– 13°07' S, 38°29'– 38°48' W, 22–28 m, coll. 2000–2003. Additional specimens: MZUSP 1246–1248, MZUSP 1256, Adeona violacea, E. Marcus det., no locality in label, but presumably from Espírito Santo, Brazil, 35 m [acc. Marcus 1949]; UFBA 909, UFBA 1054, Camamu, Barra Grande, Bahia, Brazil, 13º45' S, 38º50' W, coll. January 2004.

Diagnosis. Reptadeonella with uni- to multilaminar colonies, distal peristomial rim slightly cucullate, orifice transversely elliptical to roundly semicircular; a transverse slit-like areolar pore often visible between peristomial rim and avicularium; suboral avicularium obliquely orientated, with curved rostrum; spiramen small, elliptical, denticulate.

Etymology. Latin cuculla, hood, alluding to the distal peristomial rim.

Description. Colony encrusting, multiserial, uni- to multilaminar. Cuticle orange colored, skeleton white. Zooids hexagonal to polygonal, longer than wide, delimited by thin boundary lines within interzooidal furrows. Frontal shield heavily calcified, minutely granular, punctured by a single to double row of 28–38 marginal areolar pores. Orifice approximately 15% of total length of frontal shield, transversely elliptical to roundly semicircular, the distal rim raised, slightly cucullate, becoming more so with increasing calcification. A transversely narrow areolar pore between the peristomial rim and avicularium visible in many zooids, tending to be obliterated by secondary calcification. Suboral avicularium 0.107–0.226 mm long, obliquely directed, the acute rostral tip just curving around one side of the peristome; a pair of minute condyles placed at one-third length, the curved opesial rim with smooth, narrow, steeply descending cryptocyst. No additional frontal avicularia. Spiramen relatively small, transversely elliptical, denticulate, placed at mid-length of zooid. Gonozooids not recognized.

Remarks. Reptadeonella cucullata n. sp. can be distinguished from all congeners by the combination of multilaminar colonies, autozooids with cucullate peristomial rims, a large suboral avicularium with a curved rostrum and an elliptical denticulate spiramen. Specimens reported as Adeona violacea by Marcus (1949) from Espírito Santo, Brazil, are also characterized by zooids with a double row of frontal areolar pores, long curved avicularia and transversely oval spiramen; accordingly, specimens (MZUSP 1246–1248, 1256) are here reassigned to R. cucullata n. sp.

Reptadeonella cucullata n. sp. resembles R. costulata View in CoL and Reptadeonella hastingsae Cheetham & Sandberg, 1964 View in CoL in having hexagonal to polygonal elongate zooids and an obliquely directed suboral avicularium. Reptadeonella cucullata is distinguished from R. costulata View in CoL by the double row of marginal areolar pores (single in R. costulata View in CoL ), peristomial calcification (low in R. costulata View in CoL , cucullate in R. cucullata ), subperistomial areolar pore (small and adjacent to the suboral avicularium in R. costulata View in CoL , larger and distal to the suboral avicularium in R. cucullata ) and the shape of the avicularian rostrum (straight in R. costulata View in CoL , curved in R. cucullata ). Differences from R. hastingsae View in CoL include the multilaminar colonies (unilaminar in R. hastingsae View in CoL ), double row of marginal areolar pores (single in R. hastingsae View in CoL ) and transversely elliptical denticulate spiramen (crescentic and non-denticulate in R. hastingsae View in CoL ).

Distribution. Atlantic: Brazil (Bahia and Espírito Santo); sublittoral.

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Bryozoa

Class

Gymnolaemata

Order

Cheilostomatida

Family

Adeonidae

Genus

Reptadeonella

Loc

Reptadeonella cucullata

Almeida, Ana C. S., Souza, Facelucia B. C., Sanner, Joann & Vieira, Leandro M. 2015
2015
Loc

Reptadeonella

Almeida 2015: 4
2015
Loc

Adeona violacea:

Vieira 2008: 24
Marcus 1949: 24
1949
Loc

Lepralia violacea

Johnston 1847: 325
1847
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