Reteporella maryae, Figuerola & Gordon & Cristobo, 2018

Figuerola, Blanca, Gordon, Dennis P. & Cristobo, Javier, 2018, New deep Cheilostomata (Bryozoa) species from the Southwestern Atlantic: shedding light in the dark, Zootaxa 4375 (2), pp. 211-249 : 242

Reteporella maryae n. sp.

( FIg. 20 ; TAbLE 22)

Etymology. NAMED AFTER MARY SPENCER JONES (NHMUK) FOR HER STERLINg HELP WITH ROUTINE ENqUIRIES AND PROVISION OF SCANNINg ELECTRON MICROgRAPHS OF TYPE SPECIMENS.

Material examined. HΟlΟtype: CRBA-58255, STN PAT 0209DR02, FRAgMENT C. 20 MM LONg, 14 MM WIDE, LACKINg PROXIMAL AND DISTAL PORTIONS. Paratype: CRBA-58256, STN PAT 0209DR14, FRAgMENT C. 25 MM LONg, 16 MM WIDE, LACKINg PROXIMAL AND DISTAL PORTIONS.

Description. COLONY ARCHITECTURE AND OVERALL SIZE UNKNOWN. FENESTRAE ELONgATE, OVAL, IRREgULAR, 1.5–3.0 LONg bY 1.0–2.0 MM WIDE; TRAbECULAE CONSISTINg OF 3–5 LONgITUDINAL, ALTERNATINg AUTOZOOIDAL SERIES. AUTOZOOIDS IRREgULARLY POLYgONAL, WITH bOUNDARIES MARKED bY DISTINCT, RAISED SUTURES. FRONTAL SHIELD SMOOTH WITH FEW PORES. PRIMARY ORIFICE TRANSVERSELY OVAL, WIDER THAN LONg; DISTAL RIM WITH DENTICULATION. NO ORAL SPINES PRESENT. INNER PROXIMAL MARgIN OF PERISTOME WITH A LYRULA, THE SIDES DEVELOPED AS PROjECTINg LATERAL FLAPS. EACH AUTOZOOID WITH ONE OR MORE ADVENTITIOUS AVICULARIA FRONTALLY, VARIAbLY POSITIONED AND ORIENTATED, MOST FREqUENTLY OVAL WITH A CROSSbAR, LACKINg A COLUMELLA, AND AN EXTENSIVE PALATE. ENLARgED AVICULARIA ALONg bRANCH EDgES. ROSTRUM HOOKED. OVICELL INCONSPICUOUS, ELONgATE, OVAL, WITHOUT FRONTAL SUTURE AND WITH A WELL-DEVELOPED PROXIMAL LAbELLUM. BASAL SURFACE OF COLONY SMOOTH, WITH SUTURES, bEARINg A FEW OVAL AVICULARIA IDENTICAL TO THOSE ON THE FRONTAL SURFACE.

Remarks. RetepΟrella maryae n. sp. RESEMbLES R. antarctica (WATERS, 1904) IN THE SMOOTH FRONTAL SHIELD, AUTOZOOIDS SEPARATED bY DISTINCT SUTURES, LATERAL PERISTOMIAL ELEVATIONS AND THE PRESENCE OF ONE OR MORE FRONTAL OVAL ADVENTITIOUS AVICULARIA ON EACH AUTOZOOID. IT DIFFERS IN THE PRESENCE OF A SUbPERISTOMIAL LYRULA AND AVICULARIA ALONg bRANCH EDgES.

n, number of measurements made; SD, standard deviation

Figures

FIGURE 20. Reteporella maryae n. sp., HOLOTYPE. A, PORTION OF THE COLONY; B, GROUP OF AUTOZOOIDS; C–D, DETAIL OF THE AUTOZOOIDS WITH AVICULARIA;E–F, DETAIL OF THE OVICELLS.SCALE bARS:A–B, 1 MM; C–F, 300 ΜM.