taxonID	type	description	language	source
A462AF16B97E4C17CBBBB703651812A5.taxon	type_taxon	Type species. Ascetoaxinus quatsinoensis sp. nov., this paper.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B97E4C17CBBBB703651812A5.taxon	materials_examined	Type locality. Quatsino Sound, off of Vancouver Island, British Columbia, Canada; 50 ° 15.482 ’ N, 128 ° 26.400 ’ W to 50 ° 14.519 ’ N, 128 ° 26.567 ’ W; 1086 – 1318 m. Species included. Ascetoaxinus quatsinoensis sp. nov.; Ascetoaxinus ovoidea (Dall, 1890).	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B97E4C17CBBBB703651812A5.taxon	diagnosis	Diagnosis. Medium sized shells. Equivalve. Inequilateral, prosogyrous beaks close to the anterior, outline obliquely oval. Anterior margin sloping steeply, almost straight; anterior area defined by a distinct keel, with a deeply impressed lunule encompassing the entire anterior area. Lunule edge scalloped by rounded projections. Posterior margin broadly rounded, indented by a single sinus; posterior sulcus large, deep, distinctly angulated; submarginal sulcus smaller, sharply defining escutcheon but no distinct marginal sinus. Weak angulation between umbo and posterior ventral margin resulting in flattened area adjacent to the posterior sulcus. Anterior adductor muscle scar greatly elongate. Hinge teeth lacking. Ligament partially sunken. Gill anatomy of Dufour type 3 (Dufour 2005), filaments laminar, frontal surface broad, flat with marginal arrays of cilia. Lateral body pouches large, dense arborescent, dorsal extension of digestive gland prominent with external outgrowths.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B97E4C17CBBBB703651812A5.taxon	etymology	Etymology. From the Greek asketos meaning curiously fashioned and pertaining to the unusual scalloped lunule and the Greek axinus meaning like an axe, but also pertaining to the thyasirid genus Axinus; gender feminine (Brown 1956).	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B97E4C10CBBBB0786018119B.taxon	description	Figs. 2 – 6	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B97E4C10CBBBB0786018119B.taxon	materials_examined	Type material. Holotype, single specimen, off Quatsino Sound, Vancouver Island, British Columbia, Canada, 50 ° 15.482´N, 128 ° 26.400´W to 50 ° 14.519´N, 128 ° 26.567´W, 1086 – 1318 m. Coll. J. Boutillier, Fisheries and Oceans Canada, 02 September 2004. RBCM 010 - 00221 - 005. Measurements.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B97E4C10CBBBB0786018119B.taxon	description	Description. Shell (Fig. 2). 31.3 mm in length. Thin, brittle. Equivalve. Moderately tumid. Strongly inequilateral, prosogyrous beaks close to the anterior margin. Outline obliquely oval; anterior margin almost straight bounding a large excavated lunule; ventral margin long, almost straight; posterior margin broad, sulcate with a distinct posterior dorsal sinus. Posterior sulcus sharply defined, relatively narrow; submarginal sulcus sharply defining a flattened escutcheon. Posterior ventral slope anterior of the posterior sulcus a little flattened, creating a weak secondary ridge. Hinge teeth lacking, ligament partially sunken, relatively short being less than half the length of the escutcheon. Sculpture of well-defined growth lines; edge of lunule drawn out into five rounded projections. Muscle scars indistinct; anterior adductor scar elongate and parallel with ventral margin. Shell colour white. Anatomy (Figs. 3 – 6). Mantle is thin; unfused except for the formation of a small exhalant aperture (Fig. 3, ex). Anterior adductor scar elongate and approximately 4 times longer than posterior adductor scar; free from mantle edge for about one-fifth of its ventral edge; posterior adductor muscle oval. Foot vermiform (Fig. 3), very long, tip not noticeably expanded, heel obsolete, protractor muscles very slender. Labial palps small, narrow with a distinctly grooved dorsal zone and a long tubular portion leading to the mouth (Fig. 5 A, B). Alimentary system (Fig. 4) with short oesophagus leading to a relatively small stomach; large digestive ducts leading to the lateral body pouches open into the ventral anterior face (Fig. 5 D, dd, np), smaller ducts open dorsally on the left side and lead to a pair of outgrowths (Fig. 5 B, dg); walls of the combined style sac and mid gut thickened (Fig. 5 D, ss / mg), remainder of mid gut coiling back over style sac, passing through heart and coiling towards the posterior as the hind gut; anus opening into exhalant aperture (Fig. 4). Lateral body pouches large, arborescent, terminations cloven or single, blunt (Fig. 5 C). Kidney large and packed with golden coloured granules. Ctenidium large, both demibranchs with fully reflected filaments; outer demibranch about half the depth of the inner demibranch (Fig. 3, od, id). Filaments laminar (Fig. 6 A, C), frontal zone narrow, abfrontal zone extended and fused across the ascending and descending arms, creating junctions between the ascending and descending lamellae (Fig. 6 A, abs). Ventrally every filament is fused. The frontal surface (Fig. 6 B) is ciliated with distinct lateral cilia (lc) and laterofrontal cirri (lfc); frontal cilia not apparent, instead adjacent frontal zone appears wide and smooth (sfz). Abfrontal surfaces lined with bacteriocytes that are domed and roundly polygonal with a glycocalyx (Fig. 6 C, bc). Bacilli bacteria also present in defined bundles, measuring 1.1 um in length (Fig. 6 D, bct).	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9784C11CBBBB11866961196.taxon	description	Fig. 7	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9784C11CBBBB11866961196.taxon	materials_examined	Type material. Holotype, single specimen, 87 miles off Cape Fear, North Carolina, United States, 646 m. Coll. United States Fish Commission. USNM 64226. Synonymy. Cryptodon ovoideus, Dall, 1890; Thyasira ovoidea (Dall, 1890). Measurements.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9784C11CBBBB11866961196.taxon	description	Description. Shell (Fig. 7). 25 mm in length. Brittle, chalky. Equivalve. Moderately tumid. Strongly inequilateral, prosogyrous beaks close to the anterior margin. Outline obliquely oval; anterior margin almost straight bounding a large excavated lunule; ventral margin long, almost straight; posterior margin broad, sulcate with a distinct posterior dorsal sinus and faint submarginal sulcus. Posterior sulcus sharply defined, relatively narrow; submarginal sulcus sharply defining a projecting escutcheon. Posterior ventral slope anterior of the posterior sulcus a little flattened, creating a weak secondary ridge. Hinge teeth lacking; ligament partially sunken, relatively short with length less than half that of escutcheon. Sculpture of well-defined growth lines; edge of lunule drawn out into two rounded projections. Muscle scars prominent; anterior adductor scar elongate, mostly separate from pallial line, and in parallel with ventral margin. Shell colour, creamy-white.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9784C11CBBBB11866961196.taxon	discussion	Remarks. Based on putative geographic distributions coupled with obvious biogeographic barriers, it is most unlikely that Ascetoaxinus quatsinoensis is conspecific with A. ovoidea. Panamic and Caribbean geminate taxa in the Arcoidea have been shown to be distinct species (Marko and Moran, 2009) and this probably applies to most bivalves. Shell morphology differences are present; in A. quatsinoensis the scalloping of the lunule is more prominent as is the definition of the escutcheon.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9704C1ACBBBB388672917E0.taxon	type_taxon	Type species. Conchocele disjuncta Gabb, 1866, = C. bisecta (Conrad, 1849) after Kamenev et al. 2001.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9704C1ACBBBB388672917E0.taxon	materials_examined	Type locality. C. disjuncta: Pliocene, Dead Man's Island, San Pedro, California; C. bisecta: Miocene, Astoria, Oregon. Species included. C. bisecta (Conrad, 1849), C. novaeguinensis Okutani, 2002, Tertiary fossil taxa in Krishtofovitch (Kamchatka), Thyasira conradi Rosenkrantz, 1942 (Svalbard).	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9704C1ACBBBB388672917E0.taxon	diagnosis	Diagnosis. Medium to very large shells. Equivalve. Inequilateral, prosogyrous beaks close to anterior, outline obliquely oval. Anterior margin sloping steeply, almost straight; anterior area defined by a distinct keel; lunule weakly impressed approximately half the length of the anterior area. Posterior margin broadly rounded and indented by a single sinus; posterior sulcus deep, distinctly angulated; escutcheon weakly defined; no distinct marginal sulcus. Anterior adductor muscle scar greatly elongate. Hinge teeth lacking. Ligament partially sunken. Anterior adductor muscle much longer than posterior; mantle unfused except for a small exhalant aperture; foot vermiform; ctenidia of two fully reflected demibranchs, filaments highly modified with the abfrontal zone divided into a tubular framework and a laminar zone with regular inter-lamellar junctions; tubes lined with bacteriocytes; lateral body pouches densely arborescent.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9734C1BCBBBB31C6554170D.taxon	type_taxon	Type species. Channelaxinus oliveri Valentich-Scott & Coan, 2012 in Coan and Velentich-Scott, 2012	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9734C1BCBBBB31C6554170D.taxon	materials_examined	Type locality. Bahía Santiago, Colima, México; 19 ° 06´24 ´´ N, 104 ° 22´28 ´´ W; 10 fm (= 18 m). Species included. Channelaxinus oliveri Valentich-Scott & Coan, 2012; Thyasira excavata Dall, 1901 [= Conchocele excavata (Dall, 1901) in Coan & Valentich-Scott, 2012]; Thyasira perplicata Salas, 1996; Cryptodon investigatoris Smith, 1895 (tentative placement).	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
A462AF16B9734C1BCBBBB31C6554170D.taxon	diagnosis	Diagnosis. Moderate to large shells. Polygonal, higher than long. Beaks small, pointed, strongly prosogyrous. Anterior margin sloping long with a deeply impressed lunule, filling much of the anterior area. Posterior sulcus prominent and deep; submarginal sulcus well developed, very narrow to prominent. Median slope flattened, bounded by low ridges. Sculpture of commarginal striae. Hinge edentulous. Ligament long, narrow, sunken. Anatomy of type species unknown. Following diagnosis based on C. excavata and C. perplicata. Anterior adductor muscle much longer than posterior; mantle unfused except for a small exhalant aperture; foot vermiform with a bulbous toe; ctenidia of two fully reflected demibranchs, filaments laminar with fully ciliated frontal faces, abfrontal surfaces lined with bacteriocytes; lateral body pouches densely arborescent; dorsal digestive gland slightly protruding.	en	Oliver, P. Graham, Frey, Melissa A. (2014): Ascetoaxinus quatsinoensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866, and Channelaxinus Valentich-Scott & Coan, 2012. Zootaxa 3869 (4): 452-468, DOI: http://dx.doi.org/10.11646/zootaxa.3869.4.8
