Wilsonium brevipinne
Creators: name: Liu, Juan
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Cypriniformes
Catostomidae
Wilsonium
Wilsonium brevipinne

description: Wilsonium brevipinne (Cope, 1893)
(Figs 2, 3, 4A, 5)
1893 Amyzon brevipinne Cope: 402.
1906 Amyzon brevipinne Cope, 1893; Lambe: 154.
1977 Amyzon brevipinne Cope, 1893; Wilson: 23–32, fig. 8.
Holotype. CMNFV 6189, a fish preserved in right lateral view lacking the caudal fin (Fig. 2).
Referred materials. Well-preserved skeletal specimens: UALVP 12159, a nearly complete fish; UALVP 12658, a nearly complete fish lacking the tail; UALVP 12610, a complete right frontal; UALVP 31585, a right pharyngeal bone with teeth; ROM 11160, a pharyngeal bone with teeth; ROM 11163, a nearly complete fish.
CMN collection: CMNFV 2042, 2046, 2050, 2054, 2055, 2057, 2066, 2068, 2069, 2071–2074, 2090, 2092, 2097, 2099, 2104, 34480–34492, 34509, 34820, 34821, 348883, 34885, 34888, 34891, 34893–34899, 41745 and 41746. Specimens listed together under NMC 3132 in Wilson (1977) are re-catalogued within CMNFV 34480–34899. CMNFV 6195(a, b) and 25266 from Tranquille area are identified as Wilsonium.
UALVP collection: UALVP 12104, 12133, 12462–12464, 12480, 12481, 12483, 12487, 12496, 12509, 12512, 12514–12517, 12519–12521, 12525–12529, 12532–12534, 12537–12539, 12541, 12542, 12545–12547, 12549, 12553–12556, 12558, 12561, 12563–12566, 12568–12570, 12572–12577, 12580, 12583, 12584, 12586–12589, 12591, 12593, 12595, 12597–12599, 12601, 12602, 12605, 12606, 12611–12613, 12616, 12617, 12619, 12621–12626, 12631–12636, 12638, 12639, 12641–12645, 12647, 12651–12654, 12661–12680, 12682–12684, 12686–12689, 12691–12698, 12700–12708, 12710, 12711, 12714–12716, 12719–12729, 12731, 12733–12736, 12743–12746, 12750, 12754, 12757, 12762, 12763, 12767, 12768, 12770–12772, 12775, 12777–12779, 12783–12785, 12787–12790, 12794–12798, 12800–12804, 12806, 12807, 12810, 12812, 12813, 12819, 12820, 12825–12828, 12830, 12831, 12835, 12837–12843, 12845–12847, 12850, 12854–12858, 12860–12864, 12866, 12867, 12869, 12878, 12879, 12884, 12888, 12889, 12893–12904, 12906, 12907, 12910, 12912–12921, 12923, 12957, 12969, 12978, 12981, 12987, 12989, 12991, 12992, 13006, 13008, 13012, 13019, 13021, 13037, 13054, 13071, 13072, 13078, 13085, 13089, 13097, 13114–13126, 13129, 13131–13135, 13137–13144, 13146, 13147, 13149, 13150, 13152–13174, 13177, 13182, 13184, 13187, 13435, 14730, 14731, 14735, 14737, 14738, 14745–14748, 14754, 14755, 14759, 14760, 15912–15915, 17836, 21262–21339 and 27140.
ROM collection: ROM 11161, 11162, 11164, 11166, 11167, 11169–11171, 11179, 11182, 11370, 11377, 11379, 11382, 11387, 11389, 11461, 11468 and 19420.
Age and horizon. Allenby Formation, early Eocene.
Type locality. North Fork of the Similkameen River (Tulameen Rivers), probably in Pleasant Valley (Princeton area), British Columbia, Canada (Wilson 1977).
Additional localities. Whipsaw Creek, Blakeburn Mine areas, and Tulameen, all in British Columbia, Canada.
Revised diagnosis. Small-sized and shallow-bodied Eocene catostomid, BD/SL 0.20–0.32, HL/SL 0.30–0.40, D 12–18, A 7–10, pharyngeal teeth about 20 on each pharyngeal bone, frontal bone nearly rectangular with elongated orbital notch, supraorbital present, infraorbital series including shallow and slender lacrimal, posteroventral process of dentary short, opercle broad with OPW slightly larger than OPH, neural complex oval in shape, rib 4 not very robust with length shorter than half the regular rib, PFL about 1/2 PL, PSL sub-equal to PL, hypural 3 not fused to compound centrum.
description: Published as part of Liu, Juan, 2021, Redescription of ' Amyzon' brevipinne and remarks on North American Eocene catostomids (Cypriniformes: Catostomidae), pp. 677-689 in Journal of Systematic Palaeontology 19 (9) on pages 679-681, DOI: 10.1080/14772019.2021.1968966, http://zenodo.org/record/10883707