Peltarion Hombron & Jacquinot, 1846

Tavares, Marcos & Cleva, Régis, 2010, Trichopeltariidae (Crustacea, Decapoda, Brachyura), A New Family And Superfamily Of Eubrachyuran Crabs With Description Of One New Genus And Five New Species, Papéis Avulsos de Zoologia (São Paulo) 50 (9), pp. 97-157 : 112-116

Peltarion Hombron & Jacquinot, 1846

Peltarion .Hombron.&.Jacquinot,.1846:80.[type.species.by.monotypy. Peltarion magellanicus .Hombron. &. Jacquinot,. 1846,. junior. synonym. of. Atelecyclus spinulosus .White,.1843].

Hypopeltarium .Miers,.1886:210.[type.species:. Atelecyclus spinulosus .White,.1843..Unjustified.replacement. name. for. Peltarion . Hombron. &. Jacquinot,.1846].

Hypopeltarion . Ortmann,. 1893b:421. [unjustified. emendation.of. Hypopeltarium .Miers,.1886].

Species included: Peltarion spinulosum .(White,.1843).. This.species.is.known.from. Chile.south.to.the.Strait.of. Magellan,. Argentina,.and. Uruguay.(Rathbun,.1898b;. Garth,.1957;.Boschi,.2000;.Boschi. et al.,.1992).

Emended diagnosis:. Carapace. subcircular,. moderately. arched. transversally,. its. dorsal. surface. covered. with. fine.granules,.more.prominent. posteriorly;.branchio-cardiac. groove. well. recognizable.. Gastric. pits. small,. close.to.each.other..Hepatic,.first.and.second.epibranchial.teeth.of.carapace.lobe-like,.little.distinct,.armed. with.barbs..Carapace.posterolateral.border.irregularly. spiny..Front.cut.into.three.teeth;.central.rostral.tooth. longest,. sided. by. short. lateral. teeth.. Orbit . delimited. superiorly.by.two.supraorbital.teeth.(inner.and.medial. orbital. teeth);. laterally. by. exorbital. tooth,. inferiorly.

by. both. infraorbital. tooth. and. antennal. article. 2+3.. Exorbital. and. infraorbital. teeth. separated. by. deep,. wide.gap;.infraorbital.tooth.and.antennal.article.2+3. separated. by. deep,. narrow. notch. partially. filled. by. intercalated. piece.. Orbital. cavity. deeply. excavated.. Ocular. peduncle. freely. movable,. thick,. moderately. calcified,. fully. retractable. into. orbital. cavity.. Cornea. large,.only.little.shorter.than.half.length.of.peduncle,. normally. pigmented. (dark. brown),. ommatidiae. well. recognizable.. Antennal.article.1.slightly.beaked.laterally;.articles.2-3.fused.to.one.another.with.no.trace.of. suture.in. between..Antennal.article.2+3.hardly.movable,.fused.basally.to.intercalated.piece;.a.gap.between. antennal.article.2+3.and.lateral.rostral.tooth..Antennal. article. 2+3. distinctly. shorter. than. article. 4;. article. 4. longest.. Antennal. conduit. present;. antennal. flagellum. short,. from. 0.15. to. 0.30. of. maximal. carapace. length..Dorsal.and.ventral. faces. of.antennae.(articles. 2+3,.4-5,.and.flagellum).fringed.along.entire.length.by. row.of.long.setae..Setae.of.each.row.directed.towards. corresponding.row.on.antenna.of.opposite.side..Opposing.rows.of.setae.juxtapose,.forming.median.conduit..Mandibular.palp.3-articulated,.articles.1-2.fused. together,.immovable.in.relation.to.each.other;.suture. between.articles.1-2.still.recognizable..Limit.between. endostome.and. epistome.poorly.recognizable..Endostomial.ridges.strong,.straight,.inward.directed..Merus. of. mxp3. operculiform,. much. shorter. than. ischium,. its.distal.end.reaching.to.antennal.article.1,.helping.to.

close.prostomial.chamber..Sternal.median.line.on.sternites.7.and.8,.weakly.distinguishable.on.lower.part.of. sternite.6..Edge.of.last.thoracic.pleurite.lunate.pleural. gutter.well.developed..Pl2-3.with.one,.well.developed. pleurobranchiae.each;.mxp2.with.one,.well.developed. podobranchia..Heterochely.distinct.but.not.very.pronounced..Male.abdomen.of.four.segments.and.telson. (abdominal. segments. 3+4+5. fused. together).. Anterolateral. angles. of. abdominal. segment. six. strongly.

produced.forward,.telson.showing. as.narrow. triangle. intercalated. in. between.. Female. abdomen. of. six. free. segments.and.telson..Abdominal.sockets.and.thoracic. sternal. buttons. missing. one. another. in. large. males,. abdominal. locking. system. not. functional.. In. both. young.males.and.young.females.complementary.parts. of.abdominal.locking.system.matching.one.another;.in. young.females.buttons.far.too.small.in.relation.to.sockets..Sternal.button.adjacent.thoracic.sternal.suture.5/6.

Material examined:. Mission. du. Cap. Horn,. 1882-1883,. 3 ♂♂. 51.5 x 53.5 mm,. 52.3 x 51.3. and. 53.6 x 54.3 mm. ( MNHN-B11476 ) ;. 1 ♂. 56.5 x 58.5 mm. ( MNHN-B5443 ) ;. 10 ♀♀. 36.2 x 37.5.to.45.4 x 48.2 mm.( MNHN-B11477 ) ;. 2 ♂♂. 51.5 x 53.0. and. 41.5 x 41.0 mm. (MNHN- B11451);. 1 ♂.51.5 x 55.0 mm.( MNHN-B5442 ) ;. 1 ♂. 43.0 x 44.5 mm,. 3 ♀♀.40.7 x 42.5.to.43.0 x 46.7 mm. ( MNHN-B11466 ) .. Mission. du. Cap.Horn,.1882-1883,. Mission. à. Terre,. 1 ♂. 54.0 x 57.0 mm. (MNHN- B5405);. 4 ♂♂. 42.0 x 43.2. to. 51.5 x 53.0 mm,. 1 ♀. carapace. damaged. ( MNHN-B11440 ) .. Mission. du. Cap.Horn,.1882-1883,.“Romanche”,. 5 ♀♀. 38.2 x 39.6.to.43.2 x 46.2 mm.( MNHN-B11474 ) ;. 2 ♂♂. 31.0 x 32.0. and. 42.6 x 42.4 mm. (MNHN- B11479).. Mission. du. Cap. Horn,. 1882-1883,. “Romanche”,. Orange.Bay ,.N°34,. 1 ♂.21.4 x 20.7 mm,. 15 ♀♀. 35.7 x 36.5. to. 42.8 x 44.8 mm. (MNHN- B11472)..Mission.du.Cap.Horn,.1882-1883,. Orange. Bay,.N°36,.Mission.à.Terre. 2 ♂♂.(rostrum.broken),. cw. 51.8 mm.and.48.0 x 48.4 mm.( MNHN-B11469 ) .. Mission. du. Cap. Horn,. Fleuriais. Bay ,. N°142,. 33 m,. 29 Apr 1883,. 1 ♂. 32.6 x 31.2 mm,. 3 ♀♀. 32.9 x 33.5. to.34.7 x 35.0 mm.( MNHN-B11468 ) .. Mission. du. Cap. Horn,. Terre. de. Feu,. N°39,. 20 m,. 21 Nov 1882,. 2 ♂♂.26.3 x 26.4.&.41.7 x 43.8 mm,. 3 ♀♀.22.0 x 21.6 mm.to.24.6 x 25.0 mm.(MNHN- B11473).. Mission. du. Cap. Horn,. Punta. Arenas,. dredge,. 21 Feb 1883,. 2 ♂♂. 34.3 x 35.2 mm. and. 41.0 x 41.7 mm.( MNHN-B11456 ) .. Mission. du. Cap. Horn. 1882-1883,. N°34,. Yeudegaïa,. “Romanche”,. dredge,. 2 ♂♂.31.6 x 32.0 mm.and.30.5 x 29.6 mm,. 4 ♀♀. 32.3 x 32.8. to. 41.2 x 43.3 mm. (MNHN- B5406).. Locality. unknown,. M.. Serres. coll.. 1877,. 3 ♂♂. 40.0 x 40.8. to. 46.0 x 47.7 mm,. 2 ♀♀. 38.3 x 40.0.and.43.3 x 44.8 mm.( MNHN-B11452 ) .. Chile,. Corral,.1903,. Porter. coll.,. 1 ♂.29.3 x 30.0 mm. ( MNHN-B11481 ) .

Remarks:.The. French. ships. “Astrolabe”. and. “Zélée”. made.a.famous.expedition.to. Antarctica.and.Oceania,. under. the. command. of. Dumont-d’Urville,. between. 1837.and.1840..The.dates.of.publication.of.the.zoological.results.of.that.expedition.(atlas.by.Hombron. &. Jacquinot.published.between.1842-1854;. text. by. Jacquinot. &. Lucas. published. in. 1853). have. always. been.uncertain.until.Clark.&.Crosnier.(2000).clarified.the.dates.of.publication.of.all.the.Crustacea.plates. (1842-1854). and. text. (1854).. While. agreeing. with. the. proposed. dates. of. publication. for. the. plates,. in. Holthuis’.(2002).view.the.year.of.publication.of.the. Crustacea. text. should. be. 1853,. instead. of. 1854. as. advocated.by.Clark.&.Crosnier.(2000)..Because.the. names.in.the.plates.satisfy.the.International.Code.of. Zoological.Nomenclature.( ICZN,.1999:.Art. 12).for. names.published.before.1931,.the.names.on.the.plates. with.their.authorships.and.dates.have.priority.over.the. text.