Naslov
Nothing in sponge systematics makes sense - except in the light of DNA!

Autori
Morrow, C., Vacelet, J., Bakran-Petricioli, Tatjana, Pinheiro, U., Calabro, K., Thomas, O., McCormack, G. P.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of 10th World Sponge Conference (Galway, Irska 25. - 30. 06. 2017.) / McCormack, G. - Galway : National University of Ireland Galway, 2017, 52-53

Skup
10th World Sponge Conference

Mjesto i datum
Gaillimh, Irska, 25.06.2017. - 30.06.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Porifera, sponge systematics, Jaspis, rRNA sequences

Sažetak
Demospongiae is by far the largest group of sponges, representing approximately 80% of all known sponges. Systema Porifera (2002) aimed to provide an updated classification for sponges based (almost entirely) on morphological characters. Since the early 1990’s a number of molecular studies on sponges suggested that several demosponge orders and families were not monophyletic, however it was only in 2015 that the demosponge classification was revised in light of molecular data. Although this revision proposed many radical changes to the classification it stressed that the discovery of new taxa and the sequencing of additional species would likely lead to new phylogenetic hypotheses, which would require further changes to the classification. The current study uses a combination of morphological, molecular and chemical data to investigate the taxonomic affinities of Jaspis Gray, 1867 (Ancorinidae: Astrophorina). This is the first study to include molecular data from the type species of Jaspis, J. johnstonii (Schmidt, 1862). Although Jaspis (with 37 valid species) is the second largest genus of Ancorinidae, to date the only available DNA sequence is 18S rRNA data from J. novaezealandiae. In addition to obtaining sequence data from the type species, the present study has generated 18S and 28S rRNA sequences from a further 5 species of Jaspis. A total analysis tree using a combination of 18S and 28S rRNA sequence data shows strong support for some Jaspis species clustering with J. novaezealandiae in Astrophorina (Tetractinellida) ; J. iacuitaster clustering closely with Paratimea (Stelligeridae, Axinellida), and the type taxon, J. johnstonii clustering with Hemiasterella bouilloni in a newly identified clade, separate to Astrophorina, Hemiasterellidae (Tethyida) and Stelligeridae. Chemical screening shows H. bouilloni contains bengamides and bengazoles that are the same as those previously described from a species of Jaspis from Fiji. Our analysis of CO1 barcoding fragments shows newly obtained sequences from H. bouilloni and J. splendens clustering with Hemiasterella sp. 2 (GenBank AY561977) and Hemiasterellidae (Sponge Barcoding Database Hemiasterellidae sequence SBD 532). In this study we present morphological and molecular to support the transfer of J. iacuitaster to Paratimea, morphological, molecular and chemical data for the reassignment of Hemiasterella bouilloni to Jaspis and morphological and molecular data for the erection of a new order Jaspida ord. nov. The present study highlights the insights that can be gained by taking a more integrative approach to sponge systematics and incorporating morphological, molecular and chemical datasets.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA