Reteporella taylori, 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 : 244-245

Reteporella taylori n. sp.

( FIg. 21 ; TAbLE 23)

Etymology. NAMED AFTER DR PAUL D. TAYLOR, RENOWNED bRYOZOAN PALEONTOLOgIST, IN APPRECIATION OF HIS CONTRIbUTION DURINg COLLAbORATIVE RESEARCH ON bRYOZOANS.

Material examined. HΟlΟtype: CRBA-58260, STN PAT1108DR11 (SAMPLE COATED WITH gOLD), FRAgMENT C. 10 MM LONg, 8 MM WIDE. Paratypes: CRBA-58257, STN PAT0209DR01, COLONY C. 25 MM LONg, 19 MM WIDE, LACKINg DISTAL PORTION, ATTACHED TO ROCK; CRBA-58258, STN PAT0209DR04, FRAgMENT C. 25 MM LONg, 15 MM WIDE, LACKINg DISTAL PORTIONS.

Description. COLONY OPEN, SHALLOW CUP, OVERALL SIZE NOT KNOWN. FENESTRAE ELONgATE-OVAL, 2.0–3.0 MM LONg bY 1.0–2.0 MM WIDE; TRAbECULAE CONSISTINg OF TWO TO FIVE LONgITUDINAL, ALTERNATINg AUTOZOOIDAL SERIES. AUTOZOOIDS SEPARATED bY FAINT SUTURES. FRONTAL SHIELD SMOOTH WITH FEW PORES. PRIMARY ORIFICE TRANSVERSELY OVAL, WIDER THAN LONg, DISTAL RIM WITH DENTICULATION; PROXIMAL PERISTOMIAL RIM LOW, WITH A LYRULA ON THE INNER FACE. NO ORAL SPINES PRESENT. AUTOZOOIDS WITH ONE OR MORE ADVENTITIOUS AVICULARIA FRONTALLY, VARIAbLY POSITIONED AND ORIENTATED, MOSTLY OVAL WITH CROSSbAR, LACKINg COLUMELLA, AND AN EXTENSIVE PALATE. MANY AUTOZOOIDS WITH A MASSIVELY ENLARgED AVICULARIUM IMMEDIATELY PROXIMAL TO PERISTOME, WITH AbRUPTLY HOOKED, TRIANgULAR ROSTRUM, ALMOST PERPENDICULAR TO THE FRONTAL PLANE. SOME OF THE ENLARgED AVICULARIA ALSO PRESENT ALONg bRANCH EDgES. OVICELL INCONSPICUOUS, ELONgATE-OVAL WITH A MEDIAN FISSURE. BASAL SURFACE OF COLONY SMOOTH, WITH SUTURES, bEARINg A FEW OVAL AVICULARIA IDENTICAL TO THOSE ON THE FRONTAL SURFACE.

Remarks. RetepΟrella taylΟri n. sp. RESEMbLES R. erugata HAYWARD, 1993 AND R. hippΟcrepis (WATERS, 1904) FROM ANTARCTICA IN HAVINg A SMOOTH FRONTAL SHIELD, AUTOZOOIDS SEPARATED bY FAINT SUTURES AND NUMEROUS, DIFFERENT AVICULARIA, INCLUDINg A MASSIVELY ENLARgED TYPE WITH A HOOKED, TRIANgULAR ROSTRUM. THE MOST DISTINCTIVE FEATURE DIFFERENTIATINg IT FROM THESE TWO SPECIES IS THE bROAD PERISTOMIAL LYRULA.

n, number of measurements made; SD, standard deviation

Figures

FIGURE21.Reteporella taylorin. sp., HOLOTYPE.A, PORTION OF THE COLONY;B, GROUP OF AVICULARIAAROUND THEFENESTRA;C, GROUP OF AUTOZOOIDS; D, DETAIL OF THE PRIMARY ORIFICE WITH LYRULA AND THE ENLARGED AVICULARIUM; E, DETAIL OF THE SMALL ADVENTITIOUS AVICULARIUM;F, DORSAL SIDE OF THE COLONY WITH AVICULARIA.SCALE bARS:A–B, 500 ΜM;C, F, 200 ΜM; D–E, 50 ΜM.