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1.
Zootaxa ; 4755(1): zootaxa.4755.1.7, 2020 Mar 23.
Artigo em Inglês | MEDLINE | ID: mdl-32230198

RESUMO

A sponge collected along the Aleutian Islands of Alaska revealed an unusual combination of characters including ectosomal acantho - tornotes never before observed. Assignment to Poecilosclerida is without any doubt due to the presence of chelae but assignment to family is more problematic because 1) there is no family of Poecilosclerida (or any other demosponge) with ectosomal acantho-tornotes, and 2) the combination of occurring spicules and their arrangement does not conform completely to any Poecilosclerid family. Thus family assignment is only possible by amending the concept of an existing poecilosclerid family and allow for spined as well as smooth tornotes and a confusedly plumose choanosomal arrangement of megascleres. We suggest assignment to Hymedesmiidae as this requires relatively slight changes compared to other Poecilosclerid families. We suggest the erection of Acantorna n. gen. to accommodate Acantorna tahoma n. sp. The new genus and species differ from all other Hymedesmiid genera in the possession of the characters necessary for the suggested amendment. Additional differences to each Hymedesmiid genus are added.

2.
Zootaxa ; 4567(2): zootaxa.4567.2.2, 2019 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-31715895

RESUMO

A total of 493 sponges were collected with a bottom trawl during annual groundfish stock assessment surveys in the eastern Bering Sea in 2013, 2015, and 2016 to build an inventory of species in this largely unexplored region. We report here principally on the demosponge fauna collected during those surveys because identifications of hexactinellids are incomplete. We identified 42 unique demosponge taxa from the collection including geographical range extensions for 30 species; seven are new records for the Pacific Ocean. The collection also included three species new to science; two have been previously described (Plicatellopsis borealis Lehnert Stone 2017, Spongosorites beringensis Lehnert Stone 2017) and Antho ridgwayi sp. nov. described here. The new species differed from all northern hemisphere congeners in the complements and sizes of spicules. We document that the region is more species rich than previously suspected, particularly the continental slope where the majority of hexactinellid sponges are located.


Assuntos
Poríferos , Animais , Geografia , Oceano Pacífico
3.
Zootaxa ; 4671(3): zootaxa.4671.3.4, 2019 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-31716043

RESUMO

Two new species of Geodiidae from the Emperor Seamounts, North Pacific Ocean are described and compared to congeners. Erylus imperator n. sp. differs from all other species of Erylus from the region in having large oxyasters, present in only one other species from which it differs in several other characters. Furthermore these oxyasters most often display the tendency to reduce the number of rays to a degree that they appear as triods, microxeas or even microtylostyles, depending on the number of retained rays. The second new species, Geodia arma n. sp. is a Geodia without triaenes, a group formerly described under the genus Geodinella. We compared G. arma n. sp. with all congeners lacking triaenes and determined that it is the only known species with a cortex of up to 6 mm in thickness and also the only species with oxeas up to 6 mm in length Which range from thin and sinuous to thick and straight. To our knowledge these are the first descriptions of sponge species from the Emperor Seamount region.


Assuntos
Poríferos , Animais , Oceano Pacífico
4.
Zootaxa ; 4338(3): 546-556, 2017 Oct 26.
Artigo em Inglês | MEDLINE | ID: mdl-29245718

RESUMO

Two new species, Plicatellopsis borealis and Spongosorites beringensis, from the Bering Sea are described; both belong to genera previously not reported from the area. The genus Plicatellopsis, Burton, 1932 (Porifera, Suberitida, Suberitidae) contains five valid species, all recorded from the southern hemisphere. The record of P. borealis n. sp. from the Bering Sea is consequently the first record of the genus from the northern hemisphere. The genus Spongosorites Topsent, 1896 (Porifera, Suberitida, Halichondriidae) contains 22 valid species but none reported from the North Pacific Ocean, Bering Sea or the Arctic Ocean. The geographically closest records are six species occurring in the North Atlantic Ocean. So the description of Spongosorites beringensis n.sp. is the first record of the genus in the region.


Assuntos
Poríferos , Animais , Regiões Árticas , Oceano Atlântico , Oceano Pacífico
5.
Zootaxa ; 4144(3): 365-82, 2016 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-27470862

RESUMO

Two new species, Hamacantha (Vomerula) cassanoi n. sp. and Prosuberites salgadoi n. sp., are described from the eastern Gulf of Alaska in the North Pacific Ocean. These are the first records of the genera Hamacantha and Prosuberites from Alaska. We also report two geographic range extensions for the region. Geodia japonica Sollas, 1888 was previously known only from Japan and is now recorded from the Gulf of Alaska. We also document the first record of Rhizaxinella cervicornis Thiele, 1898 from the Gulf of Alaska. Our comprehensive inventory of the sponge fauna of the Gulf of Alaska confirms the presence of 52 taxa with an additional 38 taxa suspected of occurring in the region. This is a much lower number of species than that recorded from neighbouring regions like the Aleutian Islands and British Columbia.


Assuntos
Poríferos/classificação , Alaska , Distribuição Animal/fisiologia , Animais , Oceano Pacífico , Poríferos/fisiologia , Poríferos/ultraestrutura , Especificidade da Espécie
6.
Zootaxa ; 4092(1): 139, 2016 Mar 14.
Artigo em Inglês | MEDLINE | ID: mdl-27394372

RESUMO

Shortly after publication of Raspailia (Hymeraphiopsis) fruticosa Lehnert & Stone, 2015 Rob Van Soest (pers. communication) noticed that this species name is a junior primary homonym of Raspailia fruticosa Dendy, 1887, now accepted as Endectyon fruticosa. According to the ICZN the published species name is unavailable and we now suggest to replace the name with Raspailia (Hymeraphiopsis) septentrionalis (holotype deposited at the Zoologische Staatssammlung München, ZSM 20150392, collection data published in Lehnert & Stone 2015).


Assuntos
Poríferos/classificação , Animais , Terminologia como Assunto
7.
Zootaxa ; 4033(4): 451-83, 2015 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-26624419

RESUMO

Ten new species of demosponges, assigned to the orders Poecilosclerida, Axinellida and Dictyoceratida, discovered in the Gulf of Alaska and along the Aleutian Island Archipelago are described and compared to relevant congeners. Poecilosclerida include Cornulum globosum n. sp., Megaciella lobata n. sp., M. triangulata n. sp., Artemisina clavata n. sp., A. flabellata n. sp., Coelosphaera (Histodermion) kigushimkada n. sp., Stelodoryx mucosa n. sp. and S. siphofuscus n. sp. Axinellida is represented by Raspailia (Hymeraphiopsis) fruticosa n. sp. and Dictyoceratida is represented by Dysidea kenkriegeri n. sp. The genus Cornulum is modified to allow for smooth tylotes. We report several noteworthy biogeographical observations. We describe only the third species within the subgenus Histodermion and the first from the Indo-Pacific Region. Additionally, the subgenus Hymerhaphiopsis was previously represented by only a single species from Antarctica. We also report the first record of a dictyoceratid species from Alaska. The new collections further highlight the richness of the sponge fauna from the region, particularly for the Poecilosclerida.


Assuntos
Poríferos/classificação , Alaska , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , Ecossistema , Ilhas , Tamanho do Órgão , Poríferos/anatomia & histologia , Poríferos/crescimento & desenvolvimento
8.
Zootaxa ; 3826(2): 341-55, 2014 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-24990051

RESUMO

Two new species of the genus Stelletta and one new species of Ancorina are described from the Aleutian Islands of Alaska and compared to congeners of the region. This is the first record of the genus Ancorina in the North Pacific Ocean. Stelletta ovalae Tanita 1965 is also reported for the first time from the Bering Sea and Alaska. 


Assuntos
Poríferos/anatomia & histologia , Poríferos/classificação , Alaska , Animais , Oceano Pacífico
9.
Zootaxa ; 3700: 573-82, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-26106744

RESUMO

Four new species of Haplosclerida are described from the Aleutian Islands, Alaska: Callyspongia mucosa n.sp., Cladocroce infundibulum n. sp., Cladocroce attu n. sp. and Cladocroce kiska n. sp. The new species are described and compared to congeners of the region. This is the northernmost record of the genus Callyspongia and the first record of the subgenus Callyspongia from the North Pacific Ocean. To accommodate Cladocroce kiska in its genus the definition has to be broadened to allow sigmas.


Assuntos
Distribuição Animal/fisiologia , Poríferos/anatomia & histologia , Poríferos/classificação , Alaska , Animais , Especificidade da Espécie
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