Systematics of interstitial encrusting bryozoans from southeastern Brazil.

This paper describes 22 species of marine bryozoans found in the sand-grain-encrusting interstitial epifauna of the northeast coast of Sao Paulo state, Brazil: one new cyclostome, Disporella calcitrapa sp. nov., and 21 cheilostomes. Sixteen of the cheilostomes are new species, and three represent new genera. They are Ammatophora arenacea sp. nov., Discoporella gemmulifera sp. nov., Puellina caraguata sp. nov., Puellina tuba sp. nov., Rosulapelta rosetta gen. et sp. nov., Collarina spicata sp. nov., Hippothoa calcicola sp. nov., Trypostega ilhabelae sp. nov., Reptadeonella granulosa sp. nov., Drepanophora irregularis sp. nov., Allotherenia sabulosa gen. et sp. nov., Bryopesanser tilbrooki sp. nov., Psammocleidochasma tridentatum gen. et sp. nov., Celleporina abstrusa sp. nov., Hippoporella castellana sp. nov., and Hippoporella sabulonis sp. nov. Other species found in this habitat, Alderina smitti, Cymulopora uniserialis, Vibracellina laxibasis, Akatopora leucocypha, and Smittipora sawayai, have previously been described. The family Cymuloporidae fam. nov. is erected for Cymulopora and Crepis. The occurrence in this habitat of living colonies of bryozoans more characteristic of larger subtidal shell substrata indicates the potential importance of an interstitial refuge in maintaining and dispersing encrusting bryozoan populations along continental shelves where larger substrata are absent or rare.

Cradoscrupocellaria, a new bryozoan genus for Scrupocellaria bertholletii (Audouin) and related species (Cheilostomata, Candidae): taxonomy, biodiversity and distribution.

A new genus, Cradoscrupocellaria n. gen., is erected for Scrupocellaria bertholletii (Audouin, 1826), reported as widespread in tropical and subtropical waters. Here we select a neotype of this species in order to establish its identity and distinguish it from morphologically similar species. We include redescriptions and figures of additional species now assigned to this new genus: Cradoscrupocellaria curacaoensis (Fransen, 1986) n. comb., Cradoscrupocellaria hirsuta (Jullien & Calvet, 1903) n. comb., and Cradoscrupocellaria macrorhyncha (Gautier, 1962) n. comb. Five additional species are as-signed to the genus: Cradoscrupocellaria ellisi (Vieira & Spencer Jones, 2012) n. comb., Cradoscrupocellaria nanshaensis (Liu, 1991) n. comb., Cradoscrupocellaria reptans (Linnaeus, 1758) n. comb., Cradoscrupocellaria serrata (Waters, 1909) n. comb., and Cradoscrupocellaria tenuirostris (Osburn, 1950) n. comb. Eighteen new species are described: Cra-doscrupocellaria aegyptiana n. sp., Cradoscrupocellaria arisaigensis n. sp., Cradoscrupocellaria atlantica n. sp., Cradoscrupocellaria calypso n. sp., Cradoscrupocellaria floridana n. sp., Cradoscrupocellaria galapagensis n. sp., Cradoscrupocellaria gautieri n. sp., Cradoscrupocellaria gorgonensis n. sp., Cradoscrupocellaria hastingsae n. sp., Cradoscrupocellaria insularis n. sp., Cradoscrupocellaria jamaicensis n. sp., Cradoscrupocellaria lagaaiji n. sp., Cradoscrupocellaria macrorhynchoides n. sp., Cradoscrupocellaria makua n. sp., Cradoscrupocellaria marcusorum n. sp., Cradoscrupocellaria normani n. sp., Cradoscrupocellaria odonoghuei n. sp., and Cradoscrupocellaria osburni n. sp.

Morphology of ctenostome bryozoans: 5. Sundanella, with description of a new species from the Western Atlantic and the Multiporata concept.

Ctenostome bryozoans are a small group of gymnolaemates that comprise only a few hundred described species. Soft-tissue morphology remains the most important source for analysing morphological characters and inferring relationships within this clade. The current study focuses on the genus Sundanella, for which morphological data is scarce to almost absent. We studied two species of the genus, including one new to science, using histology and three-dimensional reconstruction techniques and confocal laser scanning microscopy. Sundanella generally has a thick, sometimes arborescent cuticle and multiporous interzooidal pore plates. The lophophore is bilateral with an oral rejection tract and generally has 30 or 31 tentacles in both species. The digestive tract shows a large cardia in S. floridensis sp. nov. and an extremely elongated intestine in Sundanella sibogae. Both terminate via a vestibular anus. Only parietodiaphragmatic muscles are present and four to six duplicature bands. Both species show a large broad frontal duplicature band further splitting into four individual bands. The collar is vestibular. Sundanella sibogae shows highly vacuolated cells at the diaphragm, whereas S. floridensis sp. nov. has unique glandular pouches at the diaphragmal area of the tentacle sheath. Such apertural glands have never been encountered in other ctenostomes. Both species of Sundanella are brooders that brood embryos either in the vestibular or cystid wall. Taken together, the current analysis shows numerous characteristics that refute an assignment of Sundanella to victorellid ctenostomes, which only show superficial resemblance, but differ substantially in most of their soft-body morphological traits. Instead, a close relationship with other multiporate ctenostomes is evident and the families Pherusellidae, Flustrellidrae and Sundanellidae should be summarized as clade 'Multiporata' in the future.

Coral reef-associated bryozoans of Jamaica.

As part of a long-term ecological study of the cryptic comunity of Jamaican coral reefs carried out by Jeremy B.C. Jackson and associates during the 1970s and early 1980s, collections were made of reef bryozoans found at 14 sites around the island. Space occupied by bryozoans on undercoral surfaces is dominated by relatively few species. However, during scanning electrone microscopy study and monograph preparation a diverse assortment of relatively rare species was discovered. Of the 132 species found, 56%, 74 species (70 cheilostomes and 4 cyclostomes) are new, as are one family (Inversiscaphidae) and 5 genera (Planospinella, Caribaria, Spirocoleopora, Gemellitheca, and Palliocella).

Twenty-First Century Biological Nomenclature-The Enduring Power of Names.

Nomenclature and taxonomy are complementary and distinct aspects of the study of biodiversity, but the two are often confused even by biologists. Taxonomy is the part of the science of systematics that deals with identifying, describing, and categorizing organisms from species to higher taxa. Nomenclature is a system of giving names to organisms based on rules established for the process. Adoption of a system of binomial nomenclature by end of the 18th century helped standardize the process of naming the wealth of new organisms collected during the Age of Exploration, but before the middle of the 19th century, the turmoil resulting from differences in procedures and philosophies among practicing taxonomists necessitated the development of codes of nomenclature to regulate naming. By the early 20th century, codified sets of rules for the names of both plants and animals, nowadays usually abbreviated as International Code of Botanical Nomenclature (Botanical Code) and ICZN (Zoological Code), were in place internationally. These codes worked reasonably well through most of the 20th century, under the aegis of various international bodies, in part because procedures exist to bypass them when their provisions threaten nomenclatural stability. They also inspired the development of other nomenclatural codes for specific groups of organisms like bacteria, and, alternatively, the proposal of unified codes for all organisms. The rapid development of electronic communications and various means of electronic publication at the end of the 20th century, combined with what may be the advent of a new age of biological extinction, resulted in pressure to revise the codes to allow at least some degree of electronic publication and speedier description of new taxa in the 21st century. Consistent and unambiguous names are the platforms on which biological research and conservation practices are built. As we pursue the goals of documenting and conserving biodiversity, for which a stable nomenclature is essential, we must do so without restricting the freedom of the science of systematics.

Korean ctenostome bryozoans-observations on living colonies, new records, five new species, and an updated checklist.

This paper describes 12 species of ctenostomes from the marine waters of the Korean Peninsula, including five new species-Alcyonidium bullitum n. sp., Alcyonidium pulposum n. sp., Alcyonidium busanensis n. sp., Immergentia cheongpodensis n. sp. and Penetrantia taeanata n. sp., the latter two constituting shell-borers that ramify within dead mollusk shells. Three previously described species are also newly added to the Korean fauna-Amathia acervata Lamouroux, 1824, Amathia medullaris Mawatari, 1972 and Walkeria prorepens Kubanin, 1992. The nomenclature of known species is updated and a revised checklist of all Korean Ctenostomata is included. New biological information is provided based on observation and microphotography of living and preserved colonies, SEM images of dry material and resin casts of ctenostome borings in mollusk shells.

Measuring Biodiversity and Extinction-Present and Past.

How biodiversity is changing in our time represents a major concern for all organismal biologists. Anthropogenic changes to our planet are decreasing species diversity through the negative effects of pollution, habitat destruction, direct extirpation of species, and climate change. But major biotic changes-including those that have both increased and decreased species diversity-have happened before in Earth's history. Biodiversity dynamics in past eras provide important context to understand ecological responses to current environmental change. The work of assessing biodiversity is woven into ecology, environmental science, conservation, paleontology, phylogenetics, evolutionary and developmental biology, and many other disciplines; yet, the absolute foundation of how we measure species diversity depends on taxonomy and systematics. The aspiration of this symposium, and complementary contributed talks, was to promote better understanding of our common goals and encourage future interdisciplinary discussion of biodiversity dynamics. The contributions in this collection of papers bring together a diverse group of speakers to confront several important themes. How can biologists best respond to the urgent need to identify and conserve diversity? How can we better communicate the nature of species across scientific disciplines? Where are the major gaps in knowledge about the diversity of living animal and plant groups, and what are the implications for understanding potential diversity loss? How can we effectively use the fossil record of past diversity and extinction to understand current biodiversity loss?

Bryozoa of Floridan Oculina reefs.

The deep-water Oculina coral reefs on the continental shelf off the east central coast of Florida are a unique protected marine habitat. A complete inventory of the Oculina-associated fauna is important to support its conservation. This paper provides an inventory of the bryozoans of the Oculina reef area. Unusually, the bryozoan fauna is dominated by encrusting cribrilinid bryozoans. These include two new species of Puellina and three other Floridan-Atlantic shelf Puellina only recently described. Additional cribrilinid species belong to the genera Klugerella and Rosulapelta. Other bryozoans found in the habitat include 38 encrusting cheilostome species, six of them new to science, belonging to the genera Callopora, Parasmittina, Parasmittina, Smittina, Microporella and Stephanollona. Cyclostomes were only sparsely represented, comprising three encrusting taxa.

Taxonomy of intertidal cheilostome Bryozoa of Maceió, northeastern Brazil. Part 1: Suborders Inovicellina, Malacostegina and Thalamoporellina.

Thirteen cheilostome bryozoan species from intertidal habitats of Maceió, Alagoas State, Brazil, are reported here. We describe four new species: Aetea cultrata n. sp., Biflustra marcusi n. sp., Biflustra sphinx n. sp. and Jellyella brasiliensis n. sp. Two other species of Inovicellina, Aetea arcuata Winston & Hayward, 2012, and Aetea curta Jullien, 1888, and four species of Malacostegina, Arbocuspis bellula (Hincks, 1881), Arbocuspis bicornis (Hincks, 1881), Arbocuspis ramosa (Osburn, 1940), and Jellyella tuberculata (Bosc, 1802), are reported on drift algae. Three species of Thalamoporellina are found for the first time in Maceió, Labioporella tuberculata Winston, Vieira & Woollacoot, 2014, Steginoporella           magnilabris (Busk, 1854) and Thalamoporella floridana Osburn, 1940.

Ctenostomatous Bryozoa from São Paulo, Brazil, with descriptions of twelve new species.

This paper describes 21 ctenostomatous bryozoans from the state of São Paulo, Brazil, based on specimens observed in vivo. A new family, Jebramellidae n. fam., is erected for a newly described genus and species, Jebramella angusta n. gen. et sp. Eleven other species are described as new: Alcyonidium exiguum n. sp., Alcyonidium pulvinatum n. sp., Alcyonidium torquatum n. sp., Alcyonidium vitreum n. sp., Bowerbankia ernsti n. sp., Bowerbankia evelinae n. sp., Bowerbankia mobilis n. sp., Nolella elizae n. sp., Panolicella brasiliensis n. sp., Sundanella rosea n. sp., Victorella araceae n. sp. Taxonomic and ecological notes are also included for nine previously described species: Aeverrillia setigera (Hincks, 1887), Alcyonidium hauffi Marcus, 1939, Alcyonidium polypylum Marcus, 1941, Anguinella palmata van Beneden, 1845, Arachnoidella evelinae (Marcus, 1937), Bantariella firmata (Marcus, 1938) n. comb., Nolella sawayai Marcus, 1938, Nolella stipata Gosse, 1855 and Zoobotryon verticillatum (delle Chiaje, 1822).

Evidence for polyphyly of the genus Scrupocellaria (Bryozoa: Candidae) based on a phylogenetic analysis of morphological characters.

The bryozoan genus Scrupocellaria comprises about 80 species in the family Candidae. We propose a hypothesis for the phylogenetic relationships among species assigned to Scrupocellaria to serve as framework for a phylogenetic classification using 35 morphological characters. Our results suggest that the genus Scrupocellaria is polyphyletic. Scrupocellaria s. str. is redefined according to four morphological features: vibracular chamber with a curved setal groove, ooecium with a single ectooecial fenestra, two axillary vibracula, and a membranous operculum with a distinct distal rim. Thus, the genus includes only 11 species: Scrupocellaria aegeensis, Scrupocellaria delilii, Scrupocellaria harmeri, Scrupocellaria incurvata, Scrupocellaria inermis, Scrupocellaria intermedia, Scrupocellaria jullieni, Scrupocellaria minuta, Scrupocellaria puelcha, Scrupocellaria scrupea, and Scrupocellaria scruposa. The monophyly of Cradoscrupocellaria is supported and five new genera are erected: Aquiloniella n. gen., Aspiscellaria n. gen., Paralicornia n. gen., Pomocellaria n. gen. and Scrupocaberea n. gen. Two other new genera, Bathycellaria n. gen. and Sinocellaria n. gen., are erected to accommodate two poorly known species, Scrupocellaria profundis Osburn and Scrupocellaria uniseriata Liu, respectively. Scrupocellaria congesta is tentatively assigned to Tricellaria. Fifteen species are reassigned to Licornia: Licornia cookie n. comb., Licornia micheli n. comb., Licornia milneri n. comb., Licornia curvata n. comb., Licornia diegensis n. comb., Licornia drachi n. comb., Licornia mexicana n. comb., Licornia pugnax n. comb., Licornia raigadensis n. comb., Licornia regularis n. comb., Licornia resseri n. comb., Licornia securifera n. comb., Licornia spinigera n. comb., Licornia tridentata n. comb., and Licornia wasinensis n. comb. Notoplites americanus n. name is proposed as a replacement name for Scrupocellaria clausa Canu & Bassler. Three fossil species are reassigned to Canda: Canda rathbuni n. comb., Canda triangulata n. comb. and Canda williardi n. comb. A species is reassigned to Notoplites, Notoplites elegantissima n. comb. The generic assignment of eleven species of Scrupocellaria, including Scrupocellaria macandrei, remains uncertain.

Dispersal in marine organisms without a pelagic larval phase.

In contrast to marine organisms whose offspring go through an extended planktonic stage, the young of others develop directly into benthic juveniles or into yolky nonfeeding larvae that spend only a few hours in the plankton before settling. Yet, paradoxically, many such species have geographic distributions that are comparable to those with a pelagic dispersal stage. This article reviews some of the ways in which these organisms can expand their distributions: drifting, rafting, hitchhiking, creeping, and hopping. Drifting applies to species in which larvae may be short-lived, but adults can detach or be detached from their benthic substratum and be passively carried to new areas, floating at the water's surface or below it. Many encrusting species and mobile species can spread by rafting, settling on natural or artificial floating substrata which are propelled by wind and currents to new regions. Hitchhiking applies to those attaching to vessels or being carried in ballast water of ships to a distant region in which their offspring can survive. Other marine species extend their distributions by hopping from one island of hard substratum or favorable sedimentary microhabitat to another, while creeping species extend their distributions along shores or shelves where habitats remain similar for long distances.

Nine new species of Bugula Oken (Bryozoa: Cheilostomata) in Brazilian shallow waters.

BACKGROUND: Bugula is a speciose genus of marine bryozoans, represented by both endemic and cosmopolitan species distributed in tropical and temperate waters and important to marine biologists because of the occurrence of many species in harbor and fouling communities, therefore as potential invaders. The southeastern Brazilian coast in the southern Atlantic hosts the highest known diversity of the genus, a status intimately associated with the intensity of collecting efforts. METHODOLOGY: Morphological data based on the examination of living specimens, scanning electron and light microscopic images, and morphometric analyses were used to assess the diversity of Bugula along the coastal areas of southern, northeastern, and southeastern Brazil. In this study, morphological species boundaries were based mainly on avicularian characters. For two morphologically very similar species, boundaries are partially supported by 16 S rDNA molecular data. RESULTS: Nine species are newly described from Brazil, as follows: Bugula bowiei n. sp. ( = Bugula turrita sensu Marcus, 1937) from the southern, northeastern, and southeastern coasts; Bugula foliolata n. sp. ( = Bugula flabellata sensu Marcus, 1938), Bugula guara n. sp., Bugula biota n. sp. and Bugula ingens n. sp from the southeastern coast; Bugula gnoma n. sp. and Bugula alba n. sp. from the northeastern coast; Bugula rochae n. sp. ( = Bugula uniserialis sensu Marcus, 1937) from the southern coast; and Bugula migottoi n. sp., from the southeastern and southern coasts. CONCLUSION: The results contribute to the morphological characterization and the knowledge of the species richness of the genus in the southwestern Atlantic (i.e., Brazil), through the description of new species in poorly sampled areas and also on the southeastern coast of that country. Additionally, the taxonomic status of the Brazilian specimens attributed to B. flabellata, B. turrita and B. uniserialis are clarified by detailed studies on zooidal and avicularia morphology.

Life in the colonies: learning the alien ways of colonial organisms.

Who needs to go to outer space to study alien beings when the oceans of our own planet abound with bizarre and unknown creatures? Many of them belong to sessile clonal and colonial groups, including sponges, hydroids, corals, octocorals, ascidians, bryozoans, and some polychaetes. Their life histories, in many ways unlike our own, are a challenge for biologists. Studying their ecology, behavior, and taxonomy means trying to "think like a colony" to understand the factors important in their lives. Until the 1980s, most marine ecologists ignored these difficult modular organisms. Plant ecologists showed them ways to deal with the two levels of asexually produced modules and genetic individuals, leading to a surge in research on the ecology of clonal and colonial marine invertebrates. Bryozoans make excellent model colonial animals. Their life histories range from ephemeral to perennial. Aspects of their lives such as growth, reproduction, partial mortality due to predation or fouling, and the behavior of both autozooids and polymorphs can be studied at the level of the colony, as well as that of the individual module, in living colonies and over time.

SKELETAL STRENGTH OF ENCRUSTING CHEILOSTOME BRYOZOANS.

Encrusting cheilostome bryozoans structurally resemble aggregates of small boxes, with both frontal and vertical walls capable of resisting forces generated by water-borne debris or predators. Both the skeletal strength and design of the walls are important in determining the relative ability of the colony to resist damage. Two mechanical tests, puncture and compression, performed on nine species of tropical bryozoans reveal significant differences in skeletal strength both between species and between the outer and inner regions of colonies. Puncture stresses required to break through the frontal walls of zooids range from 0.8 to 291.0 MNm-2 for edge zooids and from 1.1 to 457.4 MNm-2 for inner zooids; compressive stresses required to damage the colony range from 4.4 to 16.9 MNm-2 for edge regions and 6.5 to 27.2 MNm-2 for inner regions. Ecological implications for these differences in skeletal strength are discussed with particular reference to resisting predation. From the mechanical test results, the material properties of shear strength (2.6-90.5 MNm-2) and compressive strength (8.2-110.0 MNm-2) are estimated for the frontal and vertical walls, respectively. Bryozoan wall material appears to be comparable in strength to such biological ceramics as coral, echinoid spine, bivalve shell, and vertebrate bone, but lower in strength than gastropod shell.