Taxonomy of recent Adeonidae (Bryozoa, Cheilostomata) from Brazil, with the description of four new species
Author
Almeida, Ana C. S.
Author
Souza, Facelucia B. C.
Author
Sanner, Joann
Author
Vieira, Leandro M.
text
Zootaxa
2015
4013
3
348
368
journal article
10.11646/zootaxa.4013.3.2
3821cb3c-e6c6-4e74-9b0f-df7bd7ee75af
1175-5326
237289
C0B220BE-ADD6-4D07-B416-F849D96DCFA6
Reptadeonella aspera
n. sp.
(
Figs 15–18
; 38,
Table 1
)
Material examined.
Holotype
:
UFBA
1015, Camaçari, Bahia,
Brazil
,
12°50' S
,
38°10' W
,
31 m
, coll.
February 2006
.
Paratypes
:
UFBA
976,
UFBA
1003, Camaçari, Bahia,
Brazil
, 11°21’–
12°37’ S
, 37°17’–
38°47’ W
,
23–37 m
, coll. 2007;
UFBA
994,
Salvador
, Bahia,
Brazil
,
13°01' S
,
38°28' W
,
27 m
, coll.
January 2009
;
UFBA
1030,
UFBA
1052, Camamu, Bahia,
Brazil
, 12°35'–
13°07' S
, 38°29'–
38°48' W
,
47–50 m
, coll.
August 2004
.
Additional specimens
:
UFBA
0 17,
UFBA
0 45,
UFBA
0 69,
UFBA
0 98,
UFBA
979,
UFBA
981,
UFBA
983,
UFBA
987,
UFBA
989,
UFBA
992,
UFBA
997,
UFBA
999,
UFBA
1001,
UFBA
1005,
UFBA
1007,
UFBA
1009,
UFBA
1011,
UFBA
1013, Camaçari, Bahia,
Brazil
, 12°35'–
13°07' S
, 38°29'–
38°48' W
,
21–34 m
, coll.
1995–2008
.
Diagnosis.
Multiserial
Reptadeonella
with rugose frontal calcification, tubular peristome, and elliptical suboral areolar pore visible only in zooids lacking avicularium; suboral avicularium relatively small, subtriangular, directed distally; spiramen transversely elliptical.
Etymology.
From Latin
asper
, rough, alluding to frontal-shield calcification.
Description.
Colony encrusting, unilaminar, multiserial. Skeleton glossy, colony white. Zooids more or less elongate-hexagonal to rectangular, longer than wide, delimited by slightly raised irregular lateral margins. Frontal shield heavily calcified, rugose and minutely granular, marginally punctured by a single row of 13–21 areolar pores. Orifice approximately 14% of total length of frontal shield, transversely elliptical, wider than long. Peristomial rim well developed, especially proximally in relation to suboral avicularian chamber; distal areolar pores partly concealed by peristomial rim; suboral areolar pore proportionally large and elliptical, visible only in zooids lacking avicularium. Suboral avicularium relatively small,
0.078–0.117 mm
long, longer than wide, directed distally, straight, emplaced in heavily calcified area proximal to peristome, extending to one-third autozooid length; rostrum acute, opesial end with very thin, smooth cryptocystal rim, rounded, with a pair of minute condyles placed one-third length. Frontal avicularia absent. Spiramen transversely elliptical, placed at mid-length of zooid. Gonozooids not recognized.
Remarks.
The tubular peristome of
Reptadeonella aspera
n. sp.
resembles that in
Reptadeonella cellulanus
Tilbrook, Hayward & Gordon, 2001
,
Reptadeonella falciformis
Tilbrook, 2006
,
R. granulosa
,
Reptadeonella hystricosus
Tilbrook, 2006
,
Reptadeonella levinseni
(
Borg, 1940
)
,
R. tubulifera
and
Reptadeonella leilae
n. sp.
(described below).
Reptadeonella aspera
n. sp.
has rugose frontal calcification and an elliptical spiramen. Differences from
R. cellulanus
include the orientation of the suboral avicularium (distolateral in
R. cellulanus
, straight in
R. aspera
n. sp.
).
Reptadeonella falciformis
,
R. hystricosus
and
R. levinseni
have orificial condyles (absent in
R. aspera
n. sp.
).
Reptadeonella granulosa
and
R. leilae
n. sp.
lack avicularia and have a depressed circular spiramen (non-depressed and elliptical in
R. aspera
n. sp.
).
Reptadeonella aspera
n. sp.
differs from
R. tubulifera
in its frontal calcification (rugose in
R. aspera
n. sp.
, smooth in
R. tubulifera
) and spiramen (nondepressed and elliptical in
R. aspera
n. sp.
and depressed and crescentic in
R. tubulifera
). The proximal peristomial areolar pore is large and elliptical in
R. aspera
n. sp.
; it was not seen in
R. tubulifera
.
Distribution.
Atlantic:
Brazil
(Bahia); sublittoral.