FAMILY Platytroctidae Koefoed, 1927 - tubeshoulders [=Platytroctides, Platytroctides, Searsidae, Mirorictinae, Barbantini] Notes: Platytroctidés Roule, 1916:12 [ref. 3818] (family) Platytroctes [published not in latinized form after 1899, not available] Platytroctidés Roule, 1919:14 [ref. 19805] (family) Platytroctes [published not in latinized form after 1899, not available] Platytroctidae Koefoed, 1927:58 [ref. 2650] (family) Platytroctes [family name sometimes seen as Platyproctidae or Platytrochtidae; see also Sazonov 1980 [ref. 20577]] Searsidae Parr, 1951:3, 15 [ref. 3380] (family) Searsia [corrected to Searsiidae by Lindberg 1971:66 [ref. 27211], confirmed by Kreft in Hureau & Monod 1973:95 [ref. 6590] and by Nelson 1976:107 [ref. 32838]] Mirorictinae Parr, 1951:15 [ref. 3380] (subfamily) Mirorictus Barbantini Sazonov, 1986:89 [ref. 6003] (tribe) Barbantus GENUS Barbantus Parr, 1951 - searsids [=Barbantus Parr [A. E.], 1951:18] Notes: [ref. 3380]. Masc. Bathytroctes curvifrons Roule & Angel, 1931. Type by original designation (also monotypic). •Valid as Barbantus Parr, 1951 -- (Krefft 1973:95 [ref. 7166], Quéro et al. in Whitehead et al. 1984:258 [ref. 13675], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:106 [ref. 10670], Sazonov 1992:5 [ref. 21036], Sazanov 1999:1895 [ref. 24740], Carter & Hartel 2003:879 [ref. 27000]). Current status: Valid as Barbantus Parr, 1951. Platytroctidae.

Species Barbantus curvifrons (Roule & Angel, 1931) - palebelly searsid [=Bathytroctes curvifrons Roule [L.] & Angel [F.], 1931:6] Notes: [Bulletin de l'Institut Océanographique (Monaco) No. 581; ref. 3825] West of Gulf of Gascony, North Atlantic, 46°N, 10°W, station 3318, depth 0-4500 meters. Current status: Valid as Barbantus curvifrons (Roule & Angel, 1931). Platytroctidae. Distribution: Cosmopolitan, except Polar waters. Habitat: marine.

Species Barbantus elongatus Krefft, 1970 - elongate searsid (author) [=Barbantus elongatus Krefft [G.], 1970:22, Fig. 1-4] Notes: [Archiv für Fischereiwissenschaft v. 21 (no. 1); ref. 7757] Central Atlantic, 3°00'S, 20°16'W, depth about 2000 meters. Current status: Valid as Barbantus elongatus Krefft, 1970. Platytroctidae. Distribution: Eastern and central Atlantic. Habitat: marine.

GENUS Holtbyrnia Parr, 1937 - searsids [=Holtbyrnia Parr [A. E.], 1937:6, Paraholtbyrnia Krefft [G.], 1967:1] Notes: [ref. 3376]. Fem. Bathytroctes innesi Fowler, 1934. Type by original designation (also monotypic). •Valid as Holtbyrnia Parr, 1937 -- (Krefft 1973:96 [ref. 7166], Quéro et al. in Whitehead et al. 1984:259 [ref. 13675], Matsui & Rosenblatt 1986:222 [ref. 5688], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:54 [ref. 10670], Paxton et al. 1989:212 [ref. 12442], Sazanov 1999:1895 [ref. 24740], Mecklenburg et al. 2002:159 [ref. 25968], Carter & Hartel 2003:880 [ref. 27000], Paxton et al. 2006:381 [ref. 28995], Williams & Sazonov 2008:208 [ref. 30623]). Current status: Valid as Holtbyrnia Parr, 1937. Platytroctidae. (Paraholtbyrnia) [ref. 2687]. Fem. Paraholtbyrnia cyanocephala Krefft, 1967. Type by original designation (also monotypic). •Synonym of Holtbyrnia Parr, 1937 -- (Sazonov 1986 [ref. 6003], Sazanov 1999:1894 [ref. 24740]). •Valid as Paraholtbyrnia Krefft, 1967 -- (Matsui & Rosenblatt 1987:52 [ref. 10670]). Current status: Synonym of Holtbyrnia Parr, 1937. Platytroctidae.

Species Holtbyrnia anomala Krefft, 1980 - bighead searsid [=Holtbyrnia anomala Krefft [G.], 1980:55, Fig. 1] Notes: [Archiv für Fischereiwissenschaft v. 31 (no. 2); ref. 8703] Greenland Norwegian Zone, 61°21'N, 32°20'W, Walther Herwig station 682/73, depth 700-1000 meters. Current status: Valid as Holtbyrnia anomala Krefft, 1980. Platytroctidae. Distribution: Atlantic. Habitat: marine.

Species Holtbyrnia conocephala Sazonov, 1976 - Sazonov's searsid (author) [=Holtbyrnia conocephala Sazonov [Yu. I.], 1976:18] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8553] Western Pacific, 7°49'S, 120°10"E, depth 0-1500 meters over 4700 meters. Current status: Valid as Holtbyrnia conocephala Sazonov, 1976. Platytroctidae. Distribution: Western Pacific. Habitat: marine.

Species Holtbyrnia cyanocephala (Krefft, 1967) - Krefft's searsid (author) [=Paraholtbyrnia cyanocephala Krefft [G.], 1967:2, Fig. 1] Notes: [Archiv für Fischereiwissenschaft v. 18 (no. 1); ref. 2687] South of Canary Islands, central Atlantic, 23°50'N, 20°08'W, depth 500-220 meters. Current status: Valid as Holtbyrnia cyanocephala (Krefft, 1967). Platytroctidae. Distribution: Cosmopolitan. Habitat: marine.

Species Holtbyrnia innesi (Fowler, 1934) - teardrop tubeshoulder [=Bathytroctes innesi Fowler [H. W.], 1934:252, Fig. 14, Holtbyrnia kulikovi Sazonov [Yu. I.], 1976:19, Searsia polycoeca Parr [A. E.], 1937:19, Fig. 5] Notes: [Proceedings of the Academy of Natural Sciences of Philadelphia v. 85 (for 1933); ref. 1416] Western North Atlantic [Heezen Plateau], 38°29'30"N, 70°54'30"W, Albatross station 2715, depth 1753 fathoms. Current status: Valid as Holtbyrnia innesi (Fowler, 1934). Platytroctidae. Distribution: Atlantic; North Pacific including Hawaiian Ridge; eastern Pacific. Habitat: marine. (kulikovi) [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8553] Bering Sea, 58°15'N, 175°20'W, depth 0-570 meters. Current status: Synonym of Holtbyrnia innesi (Fowler, 1934). Platytroctidae. Habitat: marine. (polycoeca) [Bulletin of the Bingham Oceanographic Collection Yale University v. 3 (art. 7); ref. 3376] Near Bermuda, 32°24'15"N, 64°29'00"W, 10000 feet wire out. Current status: Synonym of Holtbyrnia innesi (Fowler, 1934). Platytroctidae. Habitat: marine. Species Holtbyrnia intermedia (Sazonov, 1976) - intermedea searsid (author) [=Sagamichthys intermedius Sazonov [Yu. I.], 1976:15, Fig. 2] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8553] Eastern Pacific, 17°46'S, 71°45'W, depth 0-720 meters. Current status: Valid as Holtbyrnia intermedia (Sazonov, 1976). Platytroctidae. Distribution: Southeastern Pacific. Habitat: marine.

Species Holtbyrnia laticauda Sazonov, 1976 - tusked tubeshoulder [=Holtbyrnia laticauda Sazonov [Yu. I.], 1976:17] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8553] Tasman Sea, southern Pacific, 34°58'S, 168°33'E, depth 0-1300 meters. Current status: Valid as Holtbyrnia laticauda Sazonov, 1976. Platytroctidae. Distribution: Southern Hemisphere: Africa to southern Australia. Habitat: marine.

Species Holtbyrnia latifrons Sazonov, 1976 - streaklight tubeshoulder [=Holtbyrnia latifrons Sazonov [Yu. I.], 1976:20, Fig. 3] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8553] Eastern Pacific, 5°59'S, 84°59'W, depth 800-900 meters, over 4000 meters. Current status: Valid as Holtbyrnia latifrons Sazonov, 1976. Platytroctidae. Distribution: Eastern Pacific. Habitat: marine.

Species Holtbyrnia macrops Maul, 1957 - bigeye searsid [=Holtbyrnia macrops Maul [G. E.], 1957:11, Figs. 1c, 2-3, Holtbyrnia (Krefftia) problematica Parr [A. E.], 1960:79, Figs. 52c-d, 54-55] Notes: [Boletim do Museu Municipal do Funchal No. 10 (art. 25); ref. 12154] Off Madeira (stomach content). Current status: Valid as Holtbyrnia macrops Maul, 1957. Platytroctidae. Distribution: North Atlantic. Habitat: marine. (problematica) [Dana Report No. 51; ref. 3384] Rosengarten area, southeast of Iceland, depth 460 meters. Current status: Synonym of Holtbyrnia macrops Maul, 1957. Platytroctidae. Habitat: marine.

Species Holtbyrnia melanocephala (Vaillant, 1888) - Vaillant's tubeshoulder (author) [=Bathytroctes melanocephalus Vaillant [L. L.], 1888:155, Pl. 11 (figs. 3-3b)] Notes: [Expéditions scientifiques du "Travailleur" et du "Talisman"; ref. 4496] Middle E. Atlantic, off Morocco, Soudan, Banc d'Arguin, depth 1435-2500 meters. Current status: Valid as Holtbyrnia melanocephala (Vaillant, 1888). Platytroctidae. Distribution: Banc d'Arguin, Eastern Atlantic. Habitat: marine.

Species Holtbyrnia ophiocephala Sazonov & Golovan, 1976 - ophiocephala tubeshoulder (author) [=Holtbyrnia ophiocephala Sazonov [Yu. I.] & Golovan [G. A.], 1976:8, Fig. 1] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8552] Northeastern Atlantic, 9°04'N, 17°36'W, depth 980 meters. Current status: Valid as Holtbyrnia ophiocephala Sazonov & Golovan, 1976. Platytroctidae. Distribution: Eastern Atlantic. Habitat: marine.

GENUS Matsuichthys Sazonov, 1992 - tubeshoulders [=Matsuichthys Sazonov [Yu. I.], 1992:3] Notes: [ref. 21036]. Masc. Barbantus aequipinnis Matsui & Rosenblatt, 1987. Type by original designation (also monotypic). •Valid as Matsuichthys Sazonov, 1992 -- (Sazanov 1999:1895 [ref. 24740]). Current status: Valid as Matsuichthys Sazonov, 1992. Platytroctidae.

Species Matsuichthys aequipinnis (Matsui & Rosenblatt, 1987) - Sulu tubeshoulder (author) [=Barbantus aequipinnis Matsui [T.] & Rosenblatt [R. H.], 1987:111, Fig. 28b] Notes: [Bulletin of the Scripps Institution of Oceanography of the University of California v. 26; ref. 10670] Sulu Sea, western Pacific, 7°54'N, 121°30'E, 8000 meters wire out. Current status: Valid as Matsuichthys aequipinnis (Matsui & Rosenblatt, 1987). Platytroctidae. Distribution: Western Pacific. Habitat: marine.

GENUS Maulisia Parr, 1960 - tubeshoulders [=Maulisia Parr [A. E.], 1960:81, Aphanichthys (subgenus of Maulisia) Matsui [T.] & Rosenblatt [R. H.], 1987:93] Notes: [ref. 3384]. Fem. Maulisia mauli Parr, 1960. Type by original designation (also monotypic). •Valid as Maulisia Parr, 1960 -- (Krefft 1973:96 [ref. 7166], Matsui & Rosenblatt 1979 [ref. 7024], Quéro et al. in Whitehead et al. 1984:260 [ref. 13675], Matsui & Rosenblatt 1986:224 [ref. 5688], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:90 [ref. 10670], Paxton et al. 1989:212 [ref. 12442], Sazanov 1999:1895 [ref. 24740], Mecklenburg et al. 2002:158 [ref. 25968], Carter & Hartel 2003:880 [ref. 27000], Paxton et al. 2006:381 [ref. 28995] Williams & Sazonov 2008:209 [ref. 30623], Mecklenburg et al. 2011:117 [ref. 31212]). Current status: Valid as Maulisia Parr, 1960. Platytroctidae. (Aphanichthys) [ref. 10670]. Masc. Maulisia microlepis Sazonov & Golovan, 1976. Type by original designation. •Synonym of Maulisia Parr, 1960. Current status: Synonym of Maulisia Parr, 1960. Platytroctidae.

Species Maulisia acuticeps Sazonov, 1976 - sharpsnout tubeshoulder [=Maulisia acuticeps Sazonov [Yu. I.], 1976:23, Fig. 4] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8553] Eastern Pacific, off northern Peru, 5°59'S, 84°59'W, depth 800-900 meters over 4000 meters. Current status: Valid as Maulisia acuticeps Sazonov, 1976. Platytroctidae. Distribution: Cosmopolitan but scattered (including Hawaiian Ridge). Habitat: marine.

Species Maulisia argipalla Matsui & Rosenblatt, 1979 - palegold searsid [=Maulisia argipalla Matsui [T.] & Rosenblatt [R. H.], 1979:65, Figs. 2b, 3c-d, 4] Notes: [Bulletin of Marine Science v. 29 (no. 1); ref. 7024] San Clemente basin, North Pacific, 32°14.5'N, 117°57.7'W, depth about 1000 meters. Current status: Valid as Maulisia argipalla Matsui & Rosenblatt, 1979. Platytroctidae. Distribution: Eastern North Atlantic, eastern Pacific and North Pacific. Habitat: marine.

Species Maulisia isaacsi Matsui & Rosenblatt, 1987 - Isaacs' tubeshoulder (author) [=Maulisia (Aphanichthys) isaacsi Matsui [T.] & Rosenblatt [R. H.], 1987:95, Fig. 26e] Notes: [Bulletin of the Scripps Institution of Oceanography of the University of California v. 26; ref. 10670] Galápagos Islands, 1°43'S, 89°52'W, 2500 meters wire out. Current status: Valid as Maulisia isaacsi Matsui & Rosenblatt, 1987. Platytroctidae. Distribution: Eastern Pacific. Habitat: marine.

Species Maulisia mauli Parr, 1960 - Maul's searsid [=Maulisia mauli Parr [A. E.], 1960:82, Figs. 56-60] Notes: [Dana Report No. 51; ref. 3384] Off Madeira (stomach content). Current status: Valid as Maulisia mauli Parr, 1960. Platytroctidae. Distribution: Circumglobal, except Polar waters. Habitat: marine.

Species Maulisia microlepis Sazonov & Golovan, 1976 - smallscale searsid [=Maulisia microlepis Sazonov [Yu. I.] & Golovan [G. A.], 1976:10, Fig. 3] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8552] Southeastern Atlantic, 27°13'S, 14°00'E, depth 1150-0 meters. Current status: Valid as Maulisia microlepis Sazonov & Golovan, 1976. Platytroctidae. Distribution: Cosmopolitan, in cold seas. Habitat: marine. GENUS Mentodus Parr, 1951 - tubeshoulders [=Mentodus (subgenus of Holtbyrnia) Parr [A. E.], 1951:16, 18, Pellisolus Parr [A. E.], 1951:17, Tragularius Matsui [T.] & Rosenblatt [R. H.], 1987:77] Notes: [ref. 3380]. Masc. Bathytroctes rostratus Günther, 1878. Type by original designation. •Valid as Mentodus Parr, 1951 -- (Krefft 1973:97 [ref. 7166], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:54 [ref. 10670], Sazonov & Miya 1996 [ref. 22116], Sazanov 1999:1895 [ref. 24740]). Current status: Valid as Mentodus Parr, 1951. Platytroctidae. (Pellisolus) [ref. 3380]. Masc. Pellisolus facilis Parr, 1951. Type by original designation (also monotypic). •Valid as Pellisolus Parr, 1951 -- (Matsui & Rosenblatt 1986:224 [ref. 5688], Matsui & Rosenblatt 1987:85 [ref. 10670], Carter & Hartel 2003:880 [ref. 27000]). •Synonym of Mentodus Parr, 1951 -- (Sazonov 1986 [ref. 6003], Sazanov 1999:1894 [ref. 24740]). Current status: Synonym of Mentodus Parr, 1951. Platytroctidae. (Tragularius) [ref. 10670]. Masc. Mentodus perforatus Sazonov & Trunov, 1978. Type by original designation. •Synonym of Mentodus Parr, 1951 -- (Sazonov et al. 1993:50 [ref. 21498], Sazonov 1999:1894 [ref. 24740]). Current status: Synonym of Mentodus Parr, 1951. Platytroctidae.

Species Mentodus bythios (Matsui & Rosenblatt, 1987) - Matsui's tubeshoulder (author) [=Tragularius bythios Matsui [T.] & Rosenblatt [R. H.], 1987:81, Fig. 24e] Notes: [Bulletin of the Scripps Institution of Oceanography of the University of California v. 26; ref. 10670] Southeastern Indian Ocean, 31°33.2'S, 95°40'E, bottom trawl at 1420 meters depth. Current status: Valid as Mentodus bythios (Matsui & Rosenblatt, 1987). Platytroctidae. Distribution: Indian Ocean. Habitat: marine.

Species Mentodus crassus Parr, 1960 - fat tubeshoulder (author) [=Mentodus crassus Parr [A. E.], 1960:89, Figs. 62-63] Notes: [Dana Report No. 51; ref. 3384] Colombian coast, 6°40'N, 80°47'W, depth about 2250 meters. Current status: Valid as Mentodus crassus Parr, 1960. Platytroctidae. Distribution: Cosmopolitan. Habitat: marine.

Species Mentodus eubranchus (Matsui & Rosenblatt, 1987) - California tubeshoulder (author) [=Pellisolus eubranchus Matsui [T.] & Rosenblatt [R. H.], 1987:87, Fig. 25e] Notes: [Bulletin of the Scripps Institution of Oceanography of the University of California v. 26; ref. 10670] Off California, U.S.A. [eastern Pacific], 28°25'N, 118°11.5'W, 5500 meters wire out. Current status: Valid as Mentodus eubranchus (Matsui & Rosenblatt, 1987). Platytroctidae. Distribution: North Pacific, including Hawaiian Ridge; eastern Pacific. Habitat: marine.

Species Mentodus facilis (Parr, 1951) - Panama tubeshoulder (author) [=Pellisolus facilis Parr [A. E.], 1951:18 (19)] Notes: [American Museum Novitates No. 1531; ref. 3380] Gulf of Panama, Pacific, 6°48'N, 80°33'W, depth about 1800 meters. Current status: Valid as Mentodus facilis (Parr, 1951). Platytroctidae. Distribution: Cosmopolitan. Habitat: marine.

Species Mentodus longirostris (Sazonov & Golovan, 1976) - longnosed tubeshoulder (author) [=Pellisolus longirostris Sazonov [Yu. I.] & Golovan [G. A.], 1976:9, Fig. 2] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8552] Northeastern Atlantic, 12°00'N, 17°32'W, depth 1300-1400 meters. Current status: Valid as Mentodus longirostris (Sazonov & Golovan, 1976). Platytroctidae. Distribution: Atlantic; possibly Indian Ocean. Habitat: marine.

Species Mentodus mesalirus (Matsui & Rosenblatt, 1987) - Herwig tubeshoulder (author) [=Tragularius mesalirus Matsui [T.] & Rosenblatt [R. H.], 1987:83, Fig. 24b] Notes: [Bulletin of the Scripps Institution of Oceanography of the University of California v. 26; ref. 10670] Eastern Atlantic, Walther Herwig station 486/71, 7°32'N, 20°54'W, depth 0-1300 meters. Current status: Valid as Mentodus mesalirus (Matsui & Rosenblatt, 1987). Platytroctidae. Distribution: Cosmopolitan, including Hawaiian Ridge (Midway Atoll). Habitat: marine.

Species Mentodus perforatus Sazonov & Trunov, 1978 - perforatus tubeshoulder (author) [=Mentodus perforatus Sazonov [Yu. I.] & Trunov [I. A.], 1978:93, Fig. 4] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 111; ref. 8882] Southeastern Atlantic, 31°08'S, 15°17'E, depth 1200-1205 meters. Current status: Valid as Mentodus perforatus Sazonov & Trunov, 1978. Platytroctidae. Distribution: Cosmopolitan. Habitat: marine.

Species Mentodus rostratus (Günther, 1878) - rostrate tubeshoulder (author) [=Bathytroctes rostratus Günther [A.], 1878:250 [23]] Notes: [Annals and Magazine of Natural History (Series 5) v. 2 (nos 7/8/9)(art. 2/22/28); ref. 2010] Off Pernambuco, 8°33'S, 34°30'W, Challenger station 120, depth 675 fathoms. Current status: Valid as Mentodus rostratus (Günther, 1878). Platytroctidae. Distribution: Cosmopolitan. Habitat: marine.

GENUS Mirorictus Parr, 1947 - tubeshoulders [=Mirorictus Parr [A. E.], 1947:59] Notes: [ref. 3379]. Masc. Mirorictus taningi Parr, 1947. Type by monotypy. •Valid as Mirorictus Parr, 1947 -- (Matsui & Rosenblatt 1987:74 [ref. 10670], Sazonov 1999:1895 [ref. 24740]). Current status: Valid as Mirorictus Parr, 1947. Platytroctidae.

Species Mirorictus taningi Parr, 1947 - Taning's tubeshoulder (author) [=Mirorictus taningi Parr [A. E.], 1947:60, Pl. 1, Normichthys campbelli Lavenberg [R. J.], 1965:22, Fig. 1] Notes: [Copeia 1947 (no. 1); ref. 3379] Gulf of Panama, 7°15'N, 78°54'W, about 1750 meters depth (3500 meters wire out). Current status: Valid as Mirorictus taningi Parr 1947. Platytroctidae. Distribution: Indo-Pacific. Habitat: marine. (campbelli) [Bulletin of the Southern California Academy of Sciences v. 64 (pt 1); ref. 9224] Outer Santa Barbara Passage, California, U.S.A., about 33°18'N, 118°39'W, depth to 900 meters. Current status: Synonym of Mirorictus taningi Parr, 1947. Platytroctidae. Habitat: marine.

GENUS Normichthys Parr, 1951 - tubeshoulders [=Normichthys Parr [A. E.], 1951:17, 19] Notes: [ref. 3380]. Masc. Normichthys operosa Parr, 1951. Type by original designation (also monotypic). •Valid as Normichthys Parr, 1951 -- (Krefft 1973:97 [ref. 7166], Quéro et al. in Whitehead et al. 1984:263 [ref. 13675], Matsui & Rosenblatt 1986:224 [ref. 5688], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:97 [ref. 10670], Heemstra 1990:115 [ref. 21682], Sazonov & Merrett 2001:S37 [ref. 26652], Carter & Hartel 2003:880 [ref. 27000]). Current status: Valid as Normichthys Parr, 1951. Platytroctidae.

Species Normichthys herringi Sazonov & Merrett, 2001 - Herring tubeshoulder (author) [=Normichthys herringi Sazonov [Yu. I.] & Merrett [N. R.], 2001:S43, Fig. 2] Notes: [Journal of Ichthyology v. 41 (suppl. 1); ref. 26652] Arbian Sea, 24°12.6'N, 58°35.4'E, caught bathypelagically over depth of 1100-1190 meters. Current status: Valid as Normichthys herringi Sazonov & Merrett, 2001. Platytroctidae. Distribution: Arabian Sea. Habitat: marine.

Species Normichthys operosus Parr, 1951 - multipore searsid [=Normichthys operosa Parr [A. E.], 1951:(17) 19, Normichthys operosa islandica Parr [A. E.], 1960:94, Figs. 65a-c, 66 (left)] Notes: [American Museum Novitates No. 1531; ref. 3380] Off western Africa, 18°22'N, 18°14'W, depth about 1250 meters. Current status: Valid as Normichthys operosus Parr, 1951. Platytroctidae. Distribution: Cosmopolitan. Habitat: marine. (islandica) [Dana Report No. 51; ref. 3384] West of Vikural, Iceland, about 66°N, 26°-27°W. Current status: Synonym of Normichthys operosus Parr, 1951. Platytroctidae. Habitat: marine.

Species Normichthys yahganorum Lavenberg, 1965 - Gamblin tubeshoulder (author) [=Normichthys yahganorum Lavenberg [R. J.], 1965:3, Figs. 1-2] Notes: [Contributions in Science (Los Angeles) No. 90; ref. 9225] About 60 miles west and just south of Isla Gamblin, off southern Chile, 45°01'S, 76°33'W, depth 0-1100 meters. Current status: Valid as Normichthys yahganorum Lavenberg, 1965. Platytroctidae. Distribution: Cosmopolitan. Habitat: marine.

GENUS Pectinantus Sazonov, 1986 - tubeshoulders [=Pectinantus Sazonov [Yu. I.], 1986:[96]] Notes: [ref. 6003]. Masc. Barbantus parini Sazonov, 1976. Type by original designation. On p. 96 of English summary. •Valid as Pectinantus Sazonov, 1986 -- (Sazonov 1992:5 [ref. 21036], Sazanov 1999:1895 [ref. 24740]). Current status: Valid as Pectinantus Sazonov, 1986. Platytroctidae.

Species Pectinantus parini (Sazonov, 1976) - Parin's tubeshoulder (author) [=Barbantus parini Sazonov [Yu. I.], 1976:14, Fig. 1] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 104; ref. 8553] Western Pacific, 5°29'N, 123°57'E, depth 1000-0 meters. Current status: Valid as Pectinantus parini (Sazonov, 1976). Platytroctidae. Distribution: Western Pacific. Habitat: marine. GENUS Persparsia Parr, 1951 - tubeshoulders [=Persparsia Parr [A. E.], 1951:17, 18] Notes: [ref. 3380]. Fem. Persparsia taaningi Parr, 1951. Type by original designation (also monotypic). •Valid as Persparsia Parr, 1951 – (Matsui & Rosenblatt 1986:225 [ref. 5688], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:49 [ref. 10670], Paxton et al. 1989:212 [ref. 12442], Gomon et al. 1994:245 [ref. 22532], Paxton et al. 2006:381 [ref. 28995], Williams & Sazonov 2008:210 [ref. 30623]). Current status: Valid as Persparsia Parr, 1951. Platytroctidae.

Species Persparsia kopua (Phillipps, 1942) - spangled tubeshoulder [=Bathytroctes kopua Phillipps [W. J.], 1942:49, Pl. 16 (fig. 1), Persparsia taaningi Parr [A. E.], 1951:(17) 18] Notes: [Records of the Dominion Museum (Wellington) v. 1 (no. 1); ref. 13216] Middle bank, Cook Strait, New Zealand, depth 100 fathoms (stomach content). Current status: Valid as Persparsia kopua (Phillipps, 1942). Platytroctidae. Distribution: Southern circumglobal (except South Africa). Habitat: marine. (taaningi) [American Museum Novitates No. 1531; ref. 3380] Off Cape of Good Hope, South Africa, 35°42'S, 18°37'E, 2500 meters wire out. Current status: Synonym of Persparsia kopua (Phillipps, 1942). Platytroctidae. Habitat: marine.

GENUS Platytroctes Günther, 1878 - searsids [=Platytroctes Günther [A.], 1878:249, Platytroctegen Lloyd [R. E.], 1909:145] Notes: [ref. 2010]. Masc. Platytroctes apus Günther, 1878. Type by monotypy. •Valid as Platytroctes Günther, 1878 -- (Krefft 1973:98 [ref. 7166], Quéro et al. in Whitehead et al. 1984:264 [ref. 13675], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:102 [ref. 10670], Paxton et al. 1989:213 [ref. 12442], Sazanov 1999:1895 [ref. 24740], Carter & Hartel 2003:879 [ref. 27000], Paxton et al. 2006:382 [ref. 28995]). Current status: Valid as Platytroctes Günther, 1878. Platytroctidae. (Platytroctegen) [ref. 2814]. Masc. Platytroctegen mirus Lloyd, 1909. Type by monotypy. •Valid as Platytroctegen Lloyd, 1909 – (Krefft 1973:98 [ref. 7166], Quéro et al. in Whitehead et al. 1984:263 [ref. 13675], Sazonov 1986 [ref. 6003]). •Synonym of Platytroctes Günther, 1878 -- (Matsui & Rosenblatt 1987:102 [ref. 10670]). Current status: Synonym of Platytroctes Günther, 1878. Platytroctidae.

Species Platytroctes apus Günther, 1878 - legless searsid [=Platytroctes apus Günther [A.], 1878:249 [22], Platytroctes procerus Brauer [A.], 1906:23, Fig. 3] Notes: [Annals and Magazine of Natural History (Series 5) v. 2 (nos 7/8/9)(art. 2/22/28); ref. 2010] Mid-Atlantic, 1°N, 26°36'W, Challenger station 107, depth 1500 fathoms. Current status: Valid as Platytroctes apus Günther, 1878. Platytroctidae. Distribution: Circumglobal, except Polar waters. Habitat: marine. (procerus) [Die Tiefsee-Fische v. 15; ref. 632] Cape Verde Islands, 14°39'05"N, 21°51'08'W, depth 2500 meters. Current status: Synonym of Platytroctes apus Günther, 1878. Platytroctidae. Habitat: marine.

Species Platytroctes mirus (Lloyd, 1909) - leaf searsid [=Platytroctegen mirus Lloyd [R. E.], 1909:145] Notes: [Memoirs of the Indian Museum v. 2 (no. 3); ref. 2814] Laccadive Sea, Bay of Bengal, 12°18'46"N, 74°05'29"E, Investigator station 371, depth 500 fathoms. Current status: Valid as Platytroctes mirus (Lloyd, 1909). Platytroctidae. Distribution: Cosmopolitan. Habitat: marine.

GENUS Sagamichthys Parr, 1953 - tubeshoulders [=Sagamichthys Parr [A. E.], 1953:1, Krefftia (subgenus of Holtbyrnia) Parr [A. E.], 1960:63, 71] Notes: [ref. 3382]. Masc. Sagamichthys abei Parr, 1953. Type by original designation (also monotypic). •Valid as Sagamichthys Parr, 1953 -- (Krefft 1973:97 [ref. 7166], Quéro et al. in Whitehead et al. 1984:265 [ref. 13675], Uyeno in Masuda et al. 1984:43 [ref. 6441], Matsui & Rosenblatt 1986:223 [ref. 5688], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:65 [ref. 10670], Sazanov 1999:1895 [ref. 24740], Mecklenburg et al. 2002:158 [ref. 25968], Carter & Hartel 2003:880 [ref. 27000]). Current status: Valid as Sagamichthys Parr, 1953. Platytroctidae. (Krefftia) [ref. 3384]. Fem. Searsia schnakenbecki Krefft, 1953. Type by original designation. •Synonym of Sagamichthys Parr, 1953 -- (Krefft 1973:97 [ref. 7166]). Current status: Synonym of Sagamichthys Parr, 1953. Platytroctidae.

Species Sagamichthys abei Parr, 1953 - shining tubeshoulder [=Sagamichthys abei Parr [A. E.], 1953:6, Fig. 1] Notes: [American Museum Novitates No. 1628; ref. 3382] Yodomi, Sagami Bay, Japan. Current status: Valid as Sagamichthys abei Parr, 1953. Platytroctidae. Distribution: Pacific: British Columbia (Canada) to Baja California (Mexico), Hawaiian Ridge, west to Japan; Peru to Chile. Habitat: marine.

Species Sagamichthys gracilis Sazonov, 1978 - gracile searsid (author) [=Sagamichthys gracilis Sazonov [Yu. I.], 1978:101, Fig. 1] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 111; ref. 8883] Southwestern Indian Ocean, Saya de Malha Bank, 8°42.7'S, 60°23'E, depth 400-600 meters over 658-722 meters. Current status: Valid as Sagamichthys gracilis Sazonov, 1978. Platytroctidae. Distribution: Indian Ocean. Habitat: marine.

Species Sagamichthys schnakenbecki (Krefft, 1953) - Schnakenbeck's searsid [=Searsia schnakenbecki, Searsia Krefft [G.] 1953:260, Fig. 1] Notes: [Zoologischer Anzeiger v. 151 (nos 9/10); ref. 12700] Iceland-Faroe Ridge, North Atlantic, depth 460 meters. Current status: Valid as Sagamichthys schnakenbecki (Krefft, 1953). Platytroctidae. Distribution: Greenland, eastern Atlantic and possibly western Atlantic. Habitat: marine.

GENUS Searsia Parr, 1937 - searsids [=Searsia Parr [A. E.], 1937:8, 12] Notes: [ref. 3376]. Fem. Searsia koefoedi Parr, 1937. Type by original designation. Searsea is a misspelling. •Valid as Searsia Parr, 1937 – (Krefft 1973:95 [ref. 7166], Quéro et al. in Whitehead et al. 1984:266 [ref. 13675], Matsui & Rosenblatt 1979:68 [ref. 7024], Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:71 [ref. 10670], Sazanov 1999:1895 [ref. 24740], Carter & Hartel 2003:880 [ref. 27000]). Current status: Valid as Searsia Parr, 1937. Platytroctidae.

Species Searsia koefoedi Parr, 1937 - Koefoed's searsid [=Searsia koefoedi Parr [A. E.], 1937:16, Fig. 4, Searsia koefoedi primicrops Parr [A. E.], 1960:61, Fig. 43 bottom] Notes: [Bulletin of the Bingham Oceanographic Collection Yale University v. 3 (art. 7); ref. 3376] Tongue of the Ocean, Bahamas, 23°39'25"N, 76°41'00"W, 7000 feet wire out. Current status: Valid as Searsia koefoedi Parr, 1937. Platytroctidae. Distribution: Cosmopolitan, except Polar waters. Habitat: marine. (primicrops) [Dana Report No. 51; ref. 3384] Tongue of the Ocean, Bahamas, 23°49'15"N, 76°58'30"W, 7000 feet wire out. Current status: Synonym of Searsia koefoedi Parr, 1937. Platytroctidae. Habitat: marine.

GENUS Searsioides Sazonov, 1977 - searsids [=Searsioides Sazonov [Yu. I.], 1977:55] Notes: [ref. 3905]. Masc. Searsioides multispinus Sazonov, 1977. Type by original designation (also monotypic). Species misspelled once as multispinis. •Synonym of Searsia Parr, 1937 -- (Matsui & Rosenblatt 1979:68 [ref. 7024]). •Valid as Searsioides Sazonov, 1977 -- (Sazonov 1986 [ref. 6003], Matsui & Rosenblatt 1987:100 [ref. 10670], Sazanov 1999:1895 [ref. 24740]). Current status: Valid as Searsioides Sazonov, 1977. Platytroctidae.

Species Searsioides calvala (Matsui & Rosenblatt, 1979) - calvala searsid (author) [=Searsia calvala Matsui [T.] & Rosenblatt [R. H.], 1979:74, Figs. 5c, 8c, 10] Notes: [Bulletin of Marine Science v. 29 (no. 1); ref. 7024] Halmahera Sea, Indonesia, Alpha Helix station 121, 0°41.7'S, 128°55.7'E, depth 1000-1400 meters. Current status: Valid as Searsioides calvala (Matsui & Rosenblatt, 1979). Platytroctidae. Distribution: Western Pacific. Habitat: marine.

Species Searsioides multispinus Sazonov, 1977 - multispined searsid (author) [=Searsioides multispinus Sazonov [Yu. I.], 1977:56, 1 fig.] Notes: [Trudy Instituta Okeanologii Imeni P.P. Shirshova v. 107; ref. 3905] Western Pacific, 7°55'N, 142°21'E, depth 1500-0 meters. Current status: Valid as Searsioides multispinus Sazonov, 1977. Platytroctidae. Distribution: Western Pacific. Habitat: marine ********************************************************************** Unavailable names, uncertain taxa

Holtbyrnia bauchoti Mayer [R. F.] & Nalbant [T. T.] 1972:160, Fig. 2 [Revue Roumaine de Biologie, Série de Zoologie v. 17 (no. 3); ref. 719] Pacific, Peru Trench. Holotype (unique): MGAB 170. •Mentioned under Holtbyrnia latifrons Sazonov 1976 -- (Mecklenburg et al. 2002:163 [ref. 25968]). Platytroctidae. Habitat: marine.