Reptadeonella leilae, 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 : 362-365

Reptadeonella leilae n. sp.

( Figs 33–36 , 42 ; Table 1 )

? Adeona tubulifera: Marcus 1939: 152 , pl. 11, fig. 19A, B. [ Brazil: Paraná] Not Adeona tubulifera Canu & Bassler, 1930: 34 , pl. 5, figs 6–9. [Galápagos Island] Reptadeonella sp.2: Almeida et al. 2015: 4. [ Brazil: Bahia; checklist]

Material examined. Holotype: UFBA 0 0 5, Camaçari, Bahia, Brazil, 12°47' S, 38°02' W, 28 m, coll. February 2007. Paratypes: UFBA 982, UFBA 984, UFBA 986, UFBA 1006, UFBA 1008, UFBA 1026, UFBA 1047, UFBA 1050, Camaçari, Bahia, Brazil, 11°21’– 12°37’ S, 37°17’– 38°47’ W, 11–27 m, coll. 1996–2010. Additional specimens: UFBA 0 11, UFBA 0 39, UFBA 0 85, UFBA 988, UFBA 993, UFBA 996, UFBA 998, UFBA 1002, UFBA 1004, UFBA 1006, UFBA 1008, UFBA 1010, UFBA 1012, UFBA 1014, UFBA 1016, UFBA 1018–1021, UFBA 1023–1025, UFBA 1027–1029, Camaçari, Bahia, Brazil, 12°35'– 13°07' S, 38°29'– 38°48' W, 21–37 m, coll. 1995–2008.

Diagnosis. Unilaminar Reptadeonella , frontal shield minutely granular-tubercular, peristome tubular, areolar pore immediately distal to base of peristome; spiramen circular, placed midlength in zooid.

Etymology. Honorific for Leila Rodrigues Mendonça Vieira, Leandro M. Vieira’s wife.

Description. Colony unilaminar, encrusting small hard substrata such as sand grains. Skeleton whitish. Zooids elongate-ocal to polygonal, longer than wide, elongated, delimited by slightly raised lateral margins in interzooidal furrows. Frontal shield heavily calcified, minutely granular-tubercular, marginally punctured by a single row of 14–25 areolar pores. Primary orifice approximately 14% of total length of frontal shield, transversely elliptical. Peristome well-developed, elevated, becoming tubular with increasing calcification, secondary orifice subelliptical; small areolar pore semilunar to semicircular immediately distal to base of peristome, often concealed. No avicularia. Spiramen depressed, circular, placed in center of zooid. Enlarged zooids present, here interpreted as gonozooids, with wider orifices.

Remarks. Unlike other Reptadeonella species, R. leilae n. sp. shares with R. granulosa and Reptadeonella hymanae Soule, 1961 the absence of avicularia. Reptadeonella leilae n. sp. and R. granulosa can be distinguished by the frontal calcification (granular-tubercular in R. leilae , with radiating ridges in R. granulosa ), peristome (tubular in R. leilae , short in R. granulosa ) and metrics (larger autozooids, gonozooids and orifice in R. leilae ). Reptadeonella leilae n. sp. is distinguished from R. hymanae by its unilaminar colonies (uni- or multilaminar in R. hymanae ), single row of marginal areolar pores (double in R. hymanae ) and tubular peristome (low in R. hymanae ).

The lack of suboral avicularia and the size of the orifice in R. leilae n. sp. resemble specimens reported by Marcus (1939) as Adeona tubulifera from Paraná, Brazil; these specimens, however, differ in having radiating ridges as in R. granulosa . Examination of Marcus’s Adeona tubilifera is required to assign it with certainty to R. leilae , R. granulosa or another species. Reptadeonella leilae n. sp. is distinguished from R. tubulifera by the absence of suboral avicularia (conspicuous in R. tubulifera ) and by the circular spiramen (crescentic to double in R. tubulifera see Cheetham et al. 2007).

Distribution. Atlantic: Brazil (Bahia); sublittoral.

TABLE 2. Morphological characters of Reptadeonella species: present (+) and absent (-), suboral avicularium (S), dimorphic avicularia (D), unknown states (?).

Figures

FIGURES 33 – 36. Reptadeonella leilae n. sp.: 33, general aspect of colony, with autozooids and a gonozooid (middle bottom); 34, close-up of autozooids showing tubular peristomes (Figs 33, 34, UFBA 0 0 5, holotype, Bahia state, Brazil). 35, autozooids and a gonozooid (center right); 36, close-up of autozooids and gonozooids (Figs 35, 36, UFBA 1008, paratype, Bahia State, Brazil). Scale bars: 33, 35 = 500 µm; 34, 36 = 200 µm.

FIGURES 37 – 42. Colonies of Reptadeonella species: 37, Reptadeonella bipartita (UFBA 266, Bahia State, Brazil), encrusting colonies on large calcareous nodule. 38, Reptadeonella aspera n. sp. (UFBA 994, paratype, Bahia State, Brazil), encrusting colonies on calcareous nodules. 39 – 40, Reptadeonella brasiliensis n. sp., uncatalogued specimen from Alagoas State, Brazil (Fig. 39) and uncatalogued specimens, Bahia State, Brazil (Fig. 40). 41, Reptadeonella cucullata n. sp. (UFBA 637, holotype, Bahia State, Brazil), encrusting multilaminar colonies. 42, Reptadeonella leilae n. sp. (UFBA 1026, paratype, Bahia State, Brazil), encrusting colonies on calcareous nodules. Scale bars: 37 = 2 cm; 38 = 2 mm; 41, 42 = 5 mm.