TABLE 2 in Meristotheca spinella Núñez-Resendiz, Dreckmann & Sentíes, sp. nov. (Solieriaceae, Rhodophyta) a new cylindrical species from the southwestern Gulf of Mexico

TABLE 2. — Comparison of the morphological features of Meristotheca spinella Núñez-Resendiz, Dreckmann & Sentíes, sp. nov., M. cylindrica Núñez-Resendiz, Dreckmann & Sentíes and other common morphologically similar cylindrical species in the Yucatan Peninsula.
Meristotheca spinellaEucheumatopsisTepoztequiellaNúñez-Resendiz,Meristotheca cylindricaisiformis (C.Agardh)rhizoidea Núñez-Dreckmann & Sentíes,Núñez-Resendiz,Núñez-Resendiz,Resendiz Dreckmann &Taxasp. nov.Dreckmann & SentíesDreckmann & SentíesSentíesThallus: position with respect toErect; attached by aErect; attached by aErect; attached by a dis-Erect; attached by athe substrate; attachmentdiscoid hold-fastdiscoid holdfastcoid holdfastdiscoid holdfastThallus: length20-35 cm5-30 cm15-40 cm20-30 cmShape of the main axes in crossTereteTerete to complanateTereteTeretesectionBranchingDichotomous, alternateAlternate opposite, andRadial alternate, subop-Irregular toopposite or lateralbranches, in turn,posite or irregularpseudodichotomousramified in the samewayBranches: diameter550-750 µm380-780 µm350-850 µm360-450 µmMedulla compositionNarrow axial filaments with Axial filaments andA dense mass ofAxial filaments andnu-merous single-celled adventi-tious filamentsthick filaments andadventi-tious filamentsrhizoidsnumerous single-celled with many rhizoidsand un-branchedrhizoidsMedullary filaments: diameter2.5-4 µm4.5-7 µm1.8-6 µm1.3-2.5 µmInner cortex cells: layers of cells;5-6; 25-45× 20−30 µm4-5; 40-80 µm2-6;4-6; 40-70 ×60-100 µmdiam-eter34-106 µm ×40-140 µmInner cortical cells: connectionSecondary pit connections Secondary pitSecondary pitSecondary pitand small connectiveconnections and crossconnectionsconnectionsfilamentswise filamentsOuter cortex cells: layers of cells; 4−5; 10-45 ×4−14 µm1-2; 9-15 µm2-3; 6-13× 3.5-4.4 µm2; 5-7 ×2.5-4.0 µmsizeRhizoidsMedullary filamentsAbsentMedullary filamentsMedullary filaments andouter cortex cellsTetrasporangia: an-choredBasally from a support cell Laterally by an irregularLaterally by a stellateBasally by an elongatedwhich in some casessupport cellsupport cellsupport cellformed a long cor-ticalfilament composed ofthree cellsTetrasporangia: size20-30 µm long50-60 µm long30-40 µm long and16-25 µm long andand 4-7 µm in diameterand 18-25 µm in10-15 µm in diameter5-11.5 µm in diameterdiameterTetrasporangia: support cell size7-10 µm long30-45 µm in diameter7-9 µm long and 4-6 µm6.5-10 µm long andand 4-6 µm in diameterin diameter3.5-7 µm in diameterCystocarps: position in theSmall lateral perforationsIn the margins of theShort lateralsUnknownthallusbranch-es or in lateralproliferationsCystocarps: goni-moblastFrom a centralFrom a centralFrom a single large cen-From a centraldevelopmentpseudoparen-pseudoparen-tral fusion cellpseudoparen-chymatous mass ofchymatous mass ofchymatous mass ofsterile cellssterile cellssterile cellsCystocarps: size600-650 µm long625-864 µm long360-498 µm longUnknownand 320-430 µm inand 480-672 µm inand 400-640 µm indiameterdiameterdiameterReferencesThis studyNúñez-Resendiz et al.Núñez-Resendiz et al.Núñez-Resendiz et al.2017a20182017b