Microporella gappai, 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 : 230-233

Microporella gappai n. sp.

( FIg. 13 ; TAbLE 15)

Etymology. NAMED AFTER DR JUAN LóPEZ-GAPPA, bRYOZOAN TAXONOMIST, IN APPRECIATION OF HIS HELP WITH THE bIbLIOgRAPHY USED FOR THIS PAPER, AND FOR HIS SIgNIFICANT CONTRIbUTION TO THE KNOWLEDgE OF bRYOZOANS FROM ARgENTINA.

Material examined. HΟlΟtype: CRBA-58248, STN PAT0209DR05, COLONY C. 20 MM LONg, 15 MM WIDE, ENCRUSTINg CORAL.

Description. COLONY ENCRUSTINg, UNILAMINAR; COLONY SIZE C. 20 MM LONg, 15 MM WIDE. AUTOZOOIDS LARgE, OVAL TO HEXAgONAL, SEPARATED bY DISTINCT gROOVES. FRONTAL SHIELD FINELY NODULAR, WITH NUMEROUS PSEUDOPORES. PRIMARY ORIFICE WIDER THAN LONg, THE PROXIMAL EDgE WITH A FINELY DENTICULATE RIM; CONDYLES LACKINg. NO ORAL SPINES. ASCOPORE NARROWLY RENIFORM, CLOSE TO PRIMARY ORIFICE, SEPARATED bY A DISTANCE LESS THAN ORIFICE LENgTH; OVAL WITH A FINELY DENTICULATE LUMEN. A SINgLE OR A PAIR OF AVICULARIA SITUATED PROXIMOLATERAL TO THE ASCOPORE, EITHER RIgHT OR LEFT. OVICELL SPHERICAL, FINELY NODULAR, WITH NUMEROUS PSEUDOPORES.

Remarks. TWO SPECIES OF MicrΟpΟrella ARE KNOWN FROM ANTARCTICA, M. crustula HAYWARD & WINSTON, 2011 AND M. stenΟpΟrta HAYWARD & TAYLOR, 1984, bUT bOTH SPECIES HAVE ORAL SPINES (6 AND 2–4, RESPECTIVELY), AND AVICULARIA WITH SETIFORM MANDIbLES PROXIMOLATERAL TO THE ORIFICE. M. gappai n. sp. RESEMbLES TWO ATLANTIC SPECIES M. areΟlata MOYANO, 1983 AND M. hyadesi (JULLIEN, 1888) IN THE AbSENCE OF ORAL SPINES AND THE PRESENCE OF A LATERODISTALLY DIRECTED AVICULARIUM WITH A SETIFORM MANDIbLE; IT DIFFERS FROM bOTH OF THESE SPECIES IN THE OCCASIONAL PRESENCE OF A PAIR OF AVICULARIA AND, SPECIFICALLY, FROM M. areΟlata IN LACKINg AN UMbO ON THE FRONTAL SHIELD, AND FROM M. hyadesi IN HAVINg A PROPORTIONATELY SMALLER AVICULARIAN CYSTID AND A SUbRENIFORM (NOT C-SHAPED) ASCOPORE.

n, number of measurements made; SD, standard deviation

Figures

FIGURE13. Microporella gappai n.sp., HOLOTYPE.A,PORTION OF A COLONY;B, DETAIL OF THE PRIMARY ORIFICE WITH AN AVICULARIUM; C, PORTION OF A COLONY WITH OVICELLS;D, DETAIL OF AN OVICELL.SCALE bARS:A, C, 200 ΜM;B, 100 ΜM; D, 1 MM.