Mucropetraliella reticulata, 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 : 228-230

Mucropetraliella reticulata n. sp.

( FIg. 11 ; TAbLE 13)

Etymology. LATIN ‘ reticulatus ’, NETLIKE, ALLUDINg TO THE CALCIFIED RETICULATE SCULPTURINg OF THE COLONY SURFACE.

Material examined. HΟlΟtype: CRBA-58249, STN PAT 1108DR02, C. 10 MM LONg, 8 MM WIDE. Paratype: CRBA-58250, STN PAT 1208DR14, C. 20 MM LONg, 10 MM WIDE.

Description. COLONY ENCRUSTINg; MAXIMUM ACHIEVAbLE SIZE NOT KNOWN. AUTOZOOIDS LARgE. FRONTAL SHIELD CONVEX, EVENLY PERFORATED. ORIFICE WITH A MEDIAN SHORT AND bROAD LYRULA AND A PAIR OF ACUTE CONDYLES; AVICULARIA OFTEN PRESENT. A PAIR OF ORAL SPINE bASES SITUATED DISTOLATERALLY. OVICELL PROMINENT, gLObULAR, LONgER THAN WIDE, DENSELY PERFORATED. SUbORAL MUCRO SMOOTH, bIFURCATINg AND FORMINg A VARIAbLE RETICULATED NET OF TUbULAR KENOZOOIDS; FROM THE PROXIMAL SIDE OF THIS TUbULAR COMPLEX OCCASIONALLY SHORT PROjECTIONS ARISE, EACH WITH A SMALL OVAL AVICULARIUM APICALLY; ALL AVICULARIA HAVE COMPLETE PIVOTAL bARS.

Remarks. MucrΟpetraliella reticulata n. sp. IS UNIqUE IN THE gENUS IN HAVINg AN ELEVATED NETWORK OF CALCIFICATION PROCEEDINg FROM THE SUbORAL MUCRO OF ADjACENT ZOOIDS. THE gENUS IS THE FIRST RECORD OF THE FAMILY IN THE PATAgONIAN REgION. THE FAMILY NAME PETRALIIDAE IS USED INSTEAD OF PETRALIELLIDAE , FOLLOWINg COOK et al. (IN PRESS).

n, number of measurements made; SD, standard deviation

Figures

FIGURE 11. Mucropetraliella reticulata n. sp., HOLOTYPE.A, PART OF THE COLONY;B, GROUP OF OVICELLS; C, DETAIL OF AUTOZOOIDS; D, DETAIL OF TWO OVICELLS; E, DETAIL OF THE PRIMARY ORIFICE; F, DETAIL OF THE PRIMARY ORIFICE WITH TWO SPINES; G, DETAIL OF THE AVICULARIUM.SCALE bARS:A–B, 1 MM; C, 500 ΜM; D, 200 ΜM;E–F, 100 ΜM,G, 50 ΜM.