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1. On the diversity of abyssal Dondersiidae (Mollusca: Aplacophora) with the description of a new genus, six new species, and a review of the family

   https://doi.org/10.11646/zootaxa.4933.1.3  

   COBO, M. CARMEN ; KOCOT, KEVIN M. ( February 2021 , Zootaxa)

   null (Ed.)

   So far, of the 292 known species of solenogasters (Mollusca, Aplacophora), 62 belong to the clade Pholidoskepia Salvini-Plawen, 1978. Of these, only two have an abyssal distribution (3500–6000 m depth). Among Pholidoskepia, Dondersiidae Simroth, 1893 is the most diverse family. This study contributes to the knowledge of this family with the description of one new genus and six new species from the abyssal South Atlantic Ocean: Dondersia ? foraminosa sp. n., Nematomenia divae sp. n., Nematomenia brasiliensis sp. n., Nematomenia ? guineana sp. n., Helluoherpia vieiralaneroi sp. n. and Inopinatamenia (gen. n.) calamitosa sp. n. Specimens were collected during DIVA (Latitudinal Gradients of Deep-Sea BioDIVersity in the Atlantic Ocean) expeditions in the Guinea (DIVA 2 Me 63/2, 2005) and Brazil (DIVA 3 Me 79/1, 2008) Basins. Specimens were characterized based primarily on the sclerites and internal anatomy, which was studied using histology. The importance of the radula and mantle sclerites for taxonomy is emphasized. Amended diagnoses for the family and some genera within this family are provided. This contribution increases the described diversity of Dondersiidae to ten genera and 38 species and highlights the need for more study of solenogasters in the deep sea. 

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2. Hungry scale worms: Phylogenetics of Peinaleopolynoe (Polynoidae, Annelida), with four new species

   https://doi.org/10.3897/zookeys.932.48532  

   Hatch, Avery S. ; Liew, Haebin ; Hourdez, Stéphane ; Rouse, Greg W. ( May 2020 , ZooKeys)

   Polynoidae Kinberg, 1856 has five branchiate genera: Branchipolynoe Pettibone, 1984, Branchinotogluma Pettibone, 1985, Branchiplicatus Pettibone, 1985, Peinaleopolynoe Desbruyères & Laubier, 1988, and Thermopolynoe Miura, 1994, all native to deep-sea, chemosynthetic-based habitats. Of these, Peinaleopolynoe has two accepted species; Peinaleopolynoe sillardi Desbruyères & Laubier, 1988 (Atlantic Ocean) and Peinaleopolynoe santacatalina Pettibone, 1993 (East Pacific Ocean). The goal of this study was to assess the phylogenetic position of Peinaleopolynoe , utilizing DNA sequences from a broad sampling of deep-sea polynoids. Representatives from all five branchiate genera were included, several species of which were sampled from near the type localities; Branchinotogluma sandersi Pettibone, 1985 from the Galápagos Rift (E/V “Nautilus”); Peinaleopolynoe sillardi from organic remains in the Atlantic Ocean; Peinaleopolynoe santacatalina from a whalefall off southern California (R/V “Western Flyer”) and Thermopolynoe branchiata Miura, 1994 from Lau Back-Arc Basin in the western Pacific (R/V “Melville”). Phylogenetic analyses were conducted using mitochondrial (COI, 16S rRNA, and CytB) and nuclear (18S rRNA, 28S rRNA, and H3) genes. The analyses revealed four new Peinaleopolynoe species from the Pacific Ocean that are formally described here: Peinaleopolynoe orphanae Hatch & Rouse, sp. nov. , type locality Pescadero Basin in the Gulf of California, Mexico (R/V “Western Flyer”); Peinaleopolynoe elvisi Hatch & Rouse, sp. nov. and Peinaleopolynoe goffrediae Hatch & Rouse, sp. nov. , both with a type locality in Monterey Canyon off California (R/V “Western Flyer”) and Peinaleopolynoe mineoi Hatch & Rouse, sp. nov. from Costa Rica methane seeps (R/V “Falkor”). In addition to DNA sequence data, the monophyly of Peinaleopolynoe is supported by the presence of ventral papillae on segments 12–15. The results also demonstrated the paraphyly of Branchinotogluma and Lepidonotopodium Pettibone, 1983 and taxonomic revision of these genera is required. We apply the subfamily name Lepidonotopodinae Pettibone 1983, for the clade comprised of Branchipolynoe , Branchinotogluma , Bathykurila , Branchiplicatus , Lepidonotopodium , Levensteiniella Pettibone, 1985, Thermopolynoe , and Peinaleopolynoe . 

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3. Endosymbiotic adaptations in three new bacterial species associated with Dictyostelium discoideum : Paraburkholderia agricolaris sp. nov., Paraburkholderia hayleyella sp. nov., and Paraburkholderia bonniea sp. nov

   https://doi.org/10.7717/peerj.9151  

   Brock, Debra A. ; Noh, Suegene ; Hubert, Alicia N.M. ; Haselkorn, Tamara S. ; DiSalvo, Susanne ; Suess, Melanie K. ; Bradley, Alexander S. ; Tavakoli-Nezhad, Mahboubeh ; Geist, Katherine S. ; Queller, David C. ; et al ( January 2020 , PeerJ)

   Here we give names to three new species of Paraburkholderia that can remain in symbiosis indefinitely in the spores of a soil dwelling eukaryote, Dictyostelium discoideum . The new species P. agricolaris sp. nov. , P. hayleyella sp. nov. , and P. bonniea sp. nov . are widespread across the eastern USA and were isolated as internal symbionts of wild-collected D. discoideum . We describe these sp. nov. using several approaches. Evidence that they are each a distinct new species comes from their phylogenetic position, average nucleotide identity, genome-genome distance, carbon usage, reduced length, cooler optimal growth temperature, metabolic tests, and their previously described ability to invade D. discoideum amoebae and form a symbiotic relationship . All three of these new species facilitate the prolonged carriage of food bacteria by D. discoideum, though they themselves are not food. Further studies of the interactions of these three new species with D. discoideum should be fruitful for understanding the ecology and evolution of symbioses. 

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4. A revision of the endemic Australian cicada genus Jassopsaltria Ashton, 1914 (Cicadidae: Cicadinae: Jassopsaltriini).

   Moulds, M.S. ; Marshall, D.C. ( October 2021 , Australian entomologist)

   The single described species of Jassopsaltria, J. rufifacies Ashton is re-described, four new species of Jassopsaltria Ashton, 1914 are described from Western Australia (J. aeroides sp. n., J. cinnamomea sp. n., J. minilyaensis sp. n., J. gracilens sp. n.) and one new species is described from the Northern Territory (J. danielsorum sp. n.). A key is provided to the six known species, and the male calling songs of all Western Australian species are presented. 

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5. A revision of the genus Wrangelia (Wrangeliaceae, Ceramiales) in Bermuda resolves six new species including W. ryancraigii from the mesophotic zone

   https://doi.org/10.1111/jpy.13466  

   Jongbloed, Walter_M ; Schneider, Craig_W ; Lane, Christopher_E ; Cassidy, Margaret_M ; Saunders, Gary_W ( June 2024 , Journal of Phycology)

   Four species of the genusWrangeliaare presently known from the western Atlantic Ocean:W. argus,W. bicuspidata,W. penicillata,andW. gordoniae, with the first three historically being reported from Bermuda. Morphological and molecular barcode (COI‐5P) and phylogenetic analyses used in this study (SSU, LSU,rbcL) indicated eight species groupings ofWrangeliain Bermuda, excluding two of the historically recognized species, retaining onlyW. arguswhile adding seven new species, of which six are formally described. What had been historically reported asW. penicillatafrom Bermuda was shown to be distinct from Mediterranean Sea specimens (type locality) and was shown to be a mixture ofW. hesperiasp. nov. andW. incrassatasp. nov. Along with these two, three other new species (W. laxasp. nov.,W. ryancraigiisp. nov., andW. secundirameasp. nov.) have complete rhizoidal cortication tightly covering axial cells of indeterminate axes below the apices, distinguishing them from the two local incompletely corticated congenersW. argusandW. absconditasp. nov., the latter a morphologically cryptic sister species withW. bicuspidatafrom the Caribbean Sea. Only one of the new species,W. ryancraigii, has thus far been observed in the mesophotic zone off the Bermuda platform, and it is morphologically cryptic with the euphotic zone'sW. laxa.

    

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