Cradoscrupocellaria jamaicensis, VIEIRA & JONES & WINSTON, 2013

VIEIRA, LEANDRO M., JONES, MARY E. SPENCER & WINSTON, JUDITH E., 2013, <p class = " HeadingRunIn " align = " left "> <strong> <em> Cradoscrupocellaria </ em>, a new bryozoan genus for <em> Scrupocellaria bertholletii </ em> (Audouin) and related species (Cheilostomata, Candidae): taxonomy, biodiversity and distribution </ strong> </ p>, Zootaxa 3707 (1), pp. 1-63 : 31-33

Cradoscrupocellaria jamaicensis n. sp.

( Fig. 14 , Table 3)

Material examined. Holotype. AMNH 1522.1 , Scrupocellaria sp. , J.E. Winston det., Rio Bueno , Jamaica, 10 m, J.B.C. Jackson coll., 1978 . Paratypes. AMNH 1524.1 , Jamaica ; AMNH 1529.1 , Scrupocellaria bertholletii, J.E. Winston det., Drunkenmans Cay, Jamaica, J.B.C. Jackson coll., 1978 . Additional specimens. AMNH 1521 B.1, Scrupocellaria bertholletii, J.E. Winston det., Discovery Bay , Jamaica, J.B.C. Jackson coll. , 1978.

Type locality. Rio Bueno , Jamaica .

Etymology. Alluding to the type locality.

Diagnosis. Chitinous joints passing across proximal end of opesia in outer zooids at bifurcation (zooids C and D); zooids with 1–2 inner and 2–3 outer distal spines, an additional median distal spine often present; scutum bi- or trifurcated, covering a small part of frontal membrane; distolateral avicularium absent; dimorphic frontal avicularium elongate, longer than wide, almost lanceolate; vibracular chamber almost rounded, small; ooecium longer than wide, with raised pseudopores.

Description. Colony erect, branches comprising 5–11 zooids. Internodes with biserial zooids in alternating series; chitinous joints passing across proximal end of opesia (rarely below it) in outer zooids at bifurcation (zooids C and D), and across proximal gymnocyst of inner zooids (F and G). Autozooids elongate with tapering proximal gymnocyst. Oval opesia occupying distal half of zooid length; cryptocyst very narrow, inconspicuous around opesia. Scutum often present, bifurcated or rarely trifurcated, inserted at midline of inner opesial border and extending beyond midline of frontal membrane. Distal spines long, unbranched, delicate; 1–2 inner and 2–3 outer distal spines, rarely 1 median distal spine; proximalmost inner and outer spines directed forward; axial zooid with 5 spines. Distolateral avicularium absent. Frontal avicularia dimorphic: a small frontal avicularium with triangular mandible, directed forward; large frontal avicularium sometimes present, 0.155 –0.190 mm long, with elongate downward-directed rostrum close to adjacent zooid, its edge serrated, mandible lanceolate, hooked distally. Vibracular chamber present on basal surface of each zooid, inconspicuous in frontal view; chamber almost circular, occupying a small part of basal area, with large rhizoidal foramen on its proximal outer corner; setal groove short, transverse to internode axis, straight, with smooth seta as long as one autozooid. Single axial vibraculum without rhizoid foramen. Rhizoids tubular, with some well-spaced retroussé hooks. Ovicells longer than wide, with raised and striate transverse bands of raised pseudopores; 2 inner and 3 outer distal spines in ovicelled zooids.

Remarks. Cradoscrupocellaria jamaicensis n. sp. resembles C. calypso n. sp., C. curacaoensis and C. floridana n. sp. in lacking distolateral avicularia but differs in the shape of the dimorphic frontal avicularium and scutum.

Distribution. Caribbean: Jamaica.

Figures

FIGURE 14. Cradoscrupocellaria jamaicensis n. sp. A–F, Uncatalogued specimen from Rio Bueno, Jamaica (type locality). A, Frontal surface of colony. B, Frontal surface of branch bifurcation; note a zooid with trifurcated scutum at upper right. C, Close-up of a branch with ovicelled zooids. D, Close-up of two zooids; note the presence of a forked scutum in the zooid at right of the branch. E, Close-up of ovicelled zooid and one gigantic frontal avicularium. F, Abfrontal surface of branch.