Two New Species of Encrusting Sponge (Porifera, Family Crellidae) from Eastern Canada
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Canadian Journal of Zoology Two new species of encrusting sponge (Porifera, Family Crellidae) from eastern Canada. Journal: Canadian Journal of Zoology Manuscript ID cjz-2021-0041.R1 Manuscript Type: Article Date Submitted by the 31-Mar-2021 Author: Complete List of Authors: Goodwin, Claire; Huntsman Marine Science Centre, Aquatic Biosciences; University of New Brunswick Saint John Dinn, Curtis; Fisheries and Oceans Canada Gulf Region, Nefedova, Ekaterina; Zoological Institute RAS Nijhof, Frauke;Draft Huntsman Marine Science Centre Murillo, Francisco; Fisheries and Oceans Canada Maritimes Region, Bedford Institute of Oceanography Nozères, Claude; Fisheries and Oceans Canada, Maurice Lamontagne Institute Is your manuscript invited for consideration in a Special Not applicable (regular submission) Issue?: PORIFERA < Taxon, <i>Crella</i>, <i>Crellomima</i>, Bay of Fundy, Keyword: Gulf of St. Lawrence, Scotian Shelf, new demosponges © The Author(s) or their Institution(s) Page 1 of 39 Canadian Journal of Zoology 1 Title: Two new species of encrusting sponge (Porifera, Family Crellidae) from eastern 2 Canada. 3 CLAIRE GOODWIN1,2, CURTIS DINN3, EKATERINA NEFEDOVA4, FRAUKE NIJHOF1, 4 FRANCISCO JAVIER MURILLO5, CLAUDE NOZÈRES6 5 1. Huntsman Marine Science Centre, St. Andrews, New Brunswick, Canada 6 2. University of New Brunswick, Saint John, New Brunswick, Canada 7 3. Fisheries and Oceans Canada, Gulf Fisheries Centre, Moncton, New Brunswick, Canada 8 4. Zoological Institute of the Russian Academy of Sciences, Saint Petersburg, Russia 9 5. Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada 10 6. Fisheries and Oceans Canada, Maurice Lamontagne Institute, Mont-Joli, Quebec, Canada 11 * corresponding author: [email protected] 12 Draft 13 Competing interests: The authors declare there are no competing interests. 14 Contributors statement: CG, CD, and FJM co-ordinated collections, and managed specimen data 15 curation. All authors contributed to taxonomic investigations. CG and CD wrote the original draft of the 16 manuscript. All authors were involved in review and editing of the manuscript. 17 18 Data availability statement: Specimens and specimen collection data is publicly available through the 19 museum specified. 20 21 Funding statement: 22 The Brier Island and Gulf of St. Lawrence taxonomic work was funded by Fisheries and Oceans Canada 23 under Marine Conservation Targets programme supervised by Peter Lawton and J. Andrew Cooper (Brier 24 Island) as well as Denise Méthé and Geneviève Faille (Gulf of St Lawrence). The Gulf of St. Lawrence 25 surveys are part of regular activities conducted and funded by Fisheries and Oceans Canada. Sample 26 collection from the Scotian Shelf and taxonomic work on specimens was made possible by Fisheries and 27 Oceans Canada Strategic Program for Ecosystem-Based Research and Advice (SPERA) funding awarded 28 to Ellen Kenchington and Melisa Wong. SCUBA collection in the Bay of Fundy and taxonomic work on 29 these specimens was supported by an award to Huntsman Marine Science Centre from the New 30 Brunswick Government Total Development Fund. 1 © The Author(s) or their Institution(s) Canadian Journal of Zoology Page 2 of 39 31 32 Acknowledgements 33 Access to type material was facilitated by Helma Roggenbuck and Andreas Schmidt-Rhaesa (Zoological 34 Museum of the University of Hamburg); Emma Sherlock and Jasmin Perera (British Museum of Natural 35 History) and the Zoological Institute of the Russian Academy of Sciences. Thanks to L.A. Kartseva from 36 the Center for collective use of Komarov Botanical Institute of the Russian Academy of Sciences, Nhu 37 Trieu of the University of New Brunswick (Fredericton) and James M. Ehrman at the Digital Microscopy 38 Facility, Mount Allison University for assistance with SEM imaging. Thanks to J. Andrew Cooper, Peter 39 Lawton and Torben Brydges for their roles in organizing the Brier Island Survey. Thanks to Pat 40 Fitzgerald and Connie Bishop for their assistance with specimen collection in the Bay of Fundy. The 41 authors thank the CCGS Teleost, CGGS Alfred Needler, and RV Fundy Spray captains and crews. 42 Thanks to Mylène Roussel for microscope slideDraft preparation and Denise Méthé for sampling supervision. 43 We also thank Geneviève Côté, and Geneviève Faille from DFO Quebec for providing samples and 44 photos. 45 46 2 © The Author(s) or their Institution(s) Page 3 of 39 Canadian Journal of Zoology 47 Abstract 48 Two new species of Crellidae Dendy, 1922 from the east coast of Canada are described. The first is 49 Crella (Pytheas) cutis sp. nov., a massively encrusting species of Crella (Pytheas) collected from depths 50 of 84 to 249 m in the Gulf of St Lawrence and on the Scotian Shelf. The second is Crellomima 51 mehqisinpekonuta sp. nov., a thinly encrusting sponge found at diving depths in the Bay of Fundy. We 52 also report the first records of Crellomima derma Hentschel, 1929 from outside the type locality (Barents 53 Sea). All known species of Crellomima are reviewed based on type material. 54 55 Key words: 56 Porifera, Crella, Crellomima, Bay of Fundy, Gulf of St. Lawrence, Scotian Shelf, new demosponges, 57 Northwest Atlantic Ocean 58 Draft 59 Introduction 60 Sponges of the family Crellidae Dendy, 1922, a likely polyphyletic group (Redmond et al. 2013; Thacker 61 et al. 2013), consist of sponges with diverse growth forms that are often found in cold and deep water 62 (Van Soest 2002). The family Crellidae consists of five genera characterized by a tangential crust of 63 acanthostyles or acanthoxeas and areolated pore fields constructed of parallel spicules (Van Soest 2002). 64 Members of the family may have arcuate isochelae, occasionally anisochelae, and rarely sigmas as 65 microscleres (Van Soest 2002). 66 The genera Crella and Crellomima are distinguished from the other members of the family as 67 they do not have reduced anisochelae (Anisocrella, one species) or asterose acanthoxeas (Crellastrina, 68 Spirorhabdia, one and two species respectively). Crella species usually have arcuate chelae with rounded 69 alae, while Crellomima chelae are polydentate (Van Soest 2002). Crella is the most species rich genus 70 with 63 species (Van Soest et al. 2021) and contains four subgenera (Crella, Grayella, Pytheas, and 71 Yvesia), though these groups were erected for convenience and do not necessarily comprise phylogenetic 72 groupings (Van Soest 2002). Crellomima contains three named species (Van Soest et al. 2021). Only 3 © The Author(s) or their Institution(s) Canadian Journal of Zoology Page 4 of 39 73 three members of the family have been identified so far from eastern Canada: Crella (Yvesia) pyrula 74 (Carter 1876), Crella (Yvesia) guernei (Topsent 1890), and Crella (Yvesia) rosea (Topsent, 1892) 75 (Topsent 1892; Goodwin 2017; Dinn and Leys 2018). 76 Collections in the Gulf of St. Lawrence, Scotian Shelf, and the Bay of Fundy along Canada’s 77 eastern coast have revealed two new species of encrusting sponges in the family Crellidae. Here we 78 describe a new massively encrusting species of Crella (Pytheas) collected in deeper water and a new 79 species of a thin crust forming Crellomima found at diving depths in the Bay of Fundy. Other members of 80 Crellomima are also reviewed based on type material. 81 82 Materials and methods 83 Specimens were collected between 2017 and 2019 in three different regions of eastern Canada: the Gulf 84 of St. Lawrence, the Scotian Shelf and the bayDraft of Fundy (Figure 1). Gulf of St. Lawrence specimens were 85 collected during two surveys: the 2018 ecosystemic survey in the Estuary and northern Gulf of St. 86 Lawrence aboard the CCGS Teleost (August 4–September 1, 2018) using a Campelen 1800 trawl towed 87 for 15 minutes at 3 knots (Bourdages et al. 2020), and the 2019 multispecies survey in the southern Gulf 88 of St. Lawrence aboard the CCGS Teleost (September 5–October 2, 2019) using a Western IIA trawl 89 towed for 30 minutes at 3.5 knots (Hurlbut and Clay 1990) (Figure 1 A). Scotian Shelf specimens were 90 collected during the 2017 summer multispecies surveys aboard the CGGS Alfred Needler (June 28– 91 August 14, 2017) also collected by Western IIA trawl towed for 30 minutes at 3.5 knots (Murillo et al. 92 2018b) (Figure 1 A). On all cruises, sponge specimens were photographed on board with a scale for size 93 reference and then either preserved in 95% ethanol or frozen. 94 Sponges in the Bay of Fundy were collected using SCUBA as part of a study on Bay of Fundy 95 sponges (Goodwin 2017) and a survey surrounding Brier Island Nova Scotia (Cooper et al. 2019) (Figure 96 1 B-C). Sponges were photographed in situ using a Nikon D300 with 60 mm macro lens in a Subal 97 Housing with an Ikelite DS125 strobe. A small piece of each sponge was then taken by hand using a knife 98 and placed in a numbered sample bag. Specimens were preserved in 95% ethanol. 4 © The Author(s) or their Institution(s) Page 5 of 39 Canadian Journal of Zoology 99 Tissue sections were prepared by sectioning very thin portions of tissue dehydrated in ethanol. 100 Sections were clarified in clove oil for several minutes then mounted on a microscope slide in Canada 101 balsam. Tissue sections were imaged using a stereomicroscope or compound microscope. To isolate 102 spicules, pieces of sponge were placed in undiluted household bleach overnight to remove tissue, then 103 rinsed four times in distilled water and cleaned in two washes of 95% ethanol. Spicules were allowed to 104 settle for at least 15 minutes between rinses and then the upper layer of liquid was pipetted off, leaving 105 the spicules undisturbed. Cleaned spicules were dried on glass slides, mounted in DPX mounting medium 106 (Sigma-Aldrich, St. Louis, MO) or Canada Balsam and imaged using a compound microscope.