Conway KW, Barrie JV, Austin WC, Luternauer JL. 1991. Holocene sponge bioherms on the western Canadian continental shelf. Continental Shelf Research 11: 771–790.

Degnan JH, Rosenberg NA. 2009. Gene tree discordance, phylogenetic inference and the multispecies coalescent. Trends in Ecology and Evolution 24: 332–340.

Dohrmann M, Collins AG, Wörheide G. 2009. New insights into the phylogeny of glass sponges (Porifera, Hexactinellida): monophyly of Lyssacinosida and Euplectellinae, and the phylogenetic position of Euretidae. Molecular Phylogenetics and Evolution 52: 257–262.

Dohrmann M, Janussen D, Reitner J, Collins AG, Wörheide G. 2008. Phylogeny and evolution of glass sponges (Porifera, Hexactinellida). Systematic Biology 57: 388–405.

Donofrio DA. 1991. Radiolaria and Porifera (spicula) from the Upper Triassic of Aghdarband (NE-Iran). Abhandlungen der Geologischen Bundes-Anstalt 38: 205–222.

Duplessis K, Reiswig HM. 2004. Three new species and a new genus of Farreidae (Porifera: Hexactinellida: Hexactinosida). Proceedings of the Biological Society of Washington 117: 199–212.

Ebach MC, Williams DM. 2010. Aphyhly: a systematic designation for a taxonomic problem. Evolutionary Biology 37: 123–127.

Edwards SV. 2009. Is a new and general theory of molecular systematics emerging? Evolution 63: 1–19.

Erpenbeck D, Hooper JNA, Wörheide G. 2006. CO1 phylogenies in diploblasts and the 'Barcoding of Life' — are we sequencing a suboptimal partition? Molecular Ecology Notes 6: 550–553.

Erpenbeck D, Wörheide G. 2007. On the molecular phylogeny of sponges (Porifera). Zootaxa 1668: 107–126.

Felsenstein J. 1985. Confidence limits on phylogenies: an approach using the bootstrap. Evolution 39: 783–791.

Göcke C, Janussen D. 2010. Report on the ANT XXIV/2 (SYSTCO) Hexactinellida (Porifera) and bathymetric-zoogeographical traits of the Hexactinellida from the Antarctic deep-sea expeditions ANDEEP and SYSTCO, and emendation of the rediscovered genus, Lonchiphora. Deep-Sea Research Part II; accepted for publication.

Gouy M, Guindon S, Gascuel O. 2010. SeaView version 4: a multiplatform graphical user interface for sequence alignment and phylogenetic tree building. Molecular Biology and Evolution 27: 221–224.

Haen KM, Lang BF, Pomponi SA, Lavrov DV. 2007. Glass sponges and bilaterian animals share derived mitochondrial genomic features: a common ancestry or parallel evolution? Molecular Biology and Evolution 24: 1518–1527.

Hillis DM, Bull JJ. 1993. An empirical test of bootstrapping as a method for assessing confidence in phylogenetic analysis. Systematic Biology 42: 182–192.

Hooper JNA, van Soest RWM. 2002. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum. 

Ijima I. 1927. Hexactinellida of the Siboga expedition. In: Weber M, ed. Uitkomsten op zoologisch, botanisch, oceanographisch et geologisch Gebied versameld in Nederlandsk Oost-Indie 1899-1900, 6. Leiden: Brill, 1–138.

Janussen D, Reiswig HM. 2009. Hexactinellida (Porifera) from the ANDEEP III expedition to the Weddell sea, Antarctica. Zootaxa 2136: 1–20.

Jobb G, von Haeseler A, Strimmer K. 2004. TREEFINDER: a powerful graphical analysis environment for molecular phylogenetics. BMC Evolutionary Biology 4: 18.

Krautter M, Conway KW, Barrie JV, Neuweiler M. 2001. Discovery of a 'living dinosaur': globally unique modern hexactinellid sponge reefs off British Columbia, Canada. Facies 44: 265–282.

Lanave C, Preparata G, Saccone C, Serio G. 1984. A new method for calculating evolutionary substitution rates. Journal of Molecular Evolution 20: 86–93.

Larkin MA, Blackshields G, Brown NP, Chenna R, McGettigan PA, McWilliam H, Valentin F, Wallace IM, Wilm A, Lopez R, Thompson JD, Gibson TJ, Higgins DG. 2007. ClustalW and ClustalX version 2.0. Bioinformatics 23: 2947–2948.

Lévi C. 1990. Claviscopulia furcillata n. sp. et autres Hexactinellida (Porifera) des mers indonésiennes. Bulletin du Muséum national d'Histoire naturelle (4, A) 8: 277–290.
Leys SP, Mackie GO, Reiswig HM. 2007. The biology of glass sponges. Advances in Marine Biology 52: 1–145.

Liu L, Yu L, Kubatko L, Pearl DK, Edwards SV. 2009. Coalescent methods for estimating phylogenetic trees. Molecular Phylogenetics and Evolution 53: 320–328.

Maldonado M, Carmona MC, Uriz MJ, Cruzado A. 1999. Decline in Mesozoic reef-building sponges explained by silicon limitation. Nature 401: 785–788.

Mehl D. 1992. Die Entwicklung der Hexactinellida seit dem Mesozoikum. Paläobiologie, Phylogenie und Evolutionsökologie. Berliner Geowissenschaftliche Abhandlungen Reihe E: Paläobiologie 2: 1–164.

Moczek AP. 2008. On the origins of novelty in development and evolution. BioEssays 30: 432–447.

Mostler H. 1990. Hexactinellide Poriferen aus pelagischen Kieselkalken (Unterer Lias, Nördliche Kalkalpen). Geologisch-Paläontologische Mitteilungen der Universität Innsbruck 17: 143–178.

Müller GB, Newman SA. 2005. The innovation triad: an EvoDevo agenda. Journal of Experimental Zoology Part B (Molecular and Developmental Evolution) 304B: 487–503.

Pisera A. 1999. Postpaleozoic history of the siliceous sponges with rigid skeletons. Memoirs of the Queensland Museum 44: 463–472.

Reid REH. 1958. A monograph of the Upper Cretaceous Hexactinellida of Great Britain and Northern Ireland. Part II. Monographs of the Paleontographical Society 112: xlvii–xlviii.

Reid REH. 1963. Notes on a classification of the Hexactinosa. Journal of Paleontology 37: 218–231.

Reiswig HM. 2002a. Class Hexactinellida Schmidt, 1870. In: Hooper JNA, van Soest RWM, eds. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum, 1201–1202.

Reiswig HM. 2002b. Family Farreidae Gray, 1872. In: Hooper JNA, van Soest RWM, eds. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum, 1332–1340.

Reiswig HM. 2002c. Family Cribrospongiidae Roemer, 1864. In: Hooper JNA, van Soest RWM, eds. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum, 1290–1292.

Reiswig HM. 2002d. Family Uncinateridae fam. nov. In: Hooper JNA, van Soest RWM, eds. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum, 1372–1376.

Reiswig HM. 2002e. Family Tretodictyidae Schulze, 1886. In: Hooper JNA, van Soest RWM, eds. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum, 1341–1354.

Reiswig HM. 2002f. Family Aphrocallistidae Gray, 1867. In: Hooper JNA, van Soest RWM, eds. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum, 1282–1286.

Reiswig HM, Dohrmann M, Pomponi SA, Wörheide G. 2008. Two new tretodictyids (Hexactinellida: Hexactinosida: Tretodictyidae) from the coasts of North America. Zootaxa 1721: 53–64.

Reiswig HM. 2010. A new species of Tretodictyum (Porifera: Hexactinellida: Tretodictyidae) from off Cocos Island, tropical eastern Pacific Ocean. Proceedings of the Biological Society of Washington 123: 242–250.

Reiswig HM, Wheeler B. 2002. Family Euretidae Zittel, 1877. In: Hooper JNA, van Soest RWM, eds. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum, 1301–1331.

Rigby JK, Pisera A, Wrzolek T, Racki G. 2001. Upper Devonian sponges from the holy cross mountains, central Poland. Palaeontology 44: 447–488.

Rosengarten RD, Sperling EA, Moreno MA, Leys SP, Dellaporta SL. 2008. The mitochondrial genome of the hexactinellid sponge Aphrocallistes vastus: evidence for programmed translational frameshifting. BMC Genomics 9: 33.

Savill NJ, Hoyle DC, Higgs PG. 2001. RNA sequence evolution with secondary structure constraints: comparison of substitution rate models using maximum-likelihood methods. Genetics 157: 399–411.

Schmidt O. 1870. Grundzüge einer Spongien-Fauna des atlantischen Gebietes. Leipzig: Wilhelm Engelmann, iii-iv, 1–88.

Schrammen A. 1912. Die Kieselspongien der oberen Kreide von Nordwestdeutschland. II Teil Triaxonia (Hexactinellida). Paläontographica, Suppl. Bd. 5: 177–385.

Schulze FE. 1886. Über den Bau und das System der Hexactinelliden. Physikalische Abhandlungen der königlich-preußischen Akademie der Wissenschaften zu Berlin 1: 1–97.

Schulze FE. 1899. Amerikanische Hexactinelliden nach dem Materiale der Albatross-Expedition. Jena: Gustav Fischer, 1–126. 

Shimodaira H. 2002. An approximately unbiased test of phylogenetic tree selection. Systematic Biology 51: 492–508.

Stamatakis A. 2006. RAxML-VI-HPC: maximum likelihood-based phylogenetic analyses with thousands of taxa and mixed models. Bioinformatics 22: 2688–2690.

Stamatakis A, Hoover P, Rougemont J. 2008. A rapid bootstrap algorithm for the RAxML web servers. Systematic Biology 57: 758–771.

Tabachnick KR. 1988. Hexactinellid sponges from the mountains of the West Pacific. In: Shirshov PP, ed. Structural and Functional Researches of the Marine Benthos. Moscow: Academy of Sciences of the USSR, 49–64.

Tabachnick KR, Janussen D. 2004. Description of a new species and subspecies of Fieldingia, erection of a new family Fieldingidae, and a new order Fieldingida (Porifera; Hexactinellida; Hexasterophora). Bolletino dei Musei di Istituto Biologia della Università di Genova 68: 623–637.

Tabachnick KR, Reiswig HM. 2000. Porifera Hexactinellida: On Euryplegma auriculare Schulze, 1886, and formation of a new order. Mémoires du Muséum national d’Histoire naturelle (A, Zoologie) 184: 39–52.

Tabachnick KR, Reiswig HM. 2002. Dictionary of Hexactinellida. In: Hooper JNA, van Soest RWM, eds. Systema Porifera. A Guide to the Classification of Sponges. New York: Plenum, 1224–1229.

Topsent E. 1928. Spongiaires de l’Atlantique et de la Méditerranée provenant des croisières du Prince Albert 1er de Monaco. Résultats des campagnes scientifiques accomplies par le Prince Albert I. Monaco 74: 1–376.

Yang Z. 1994. Maximum likelihood phylogenetic estimation from DNA sequences with variable rates over sites: approximate methods. Journal of Molecular Evolution 39: 306–314.