Species of Branchiomma (Polychaeta: Sabellidae) from the Caribbean Sea and Pacific coast of Panama Author Tovar-Hernández, María Ana Laboratorio de poliquetos, El Colegio de la Frontera Sur, Unidad Chetumal, Av. Centenario Km. 5.5, 77900, Author Knight-Jones, Phyllis text Zootaxa 2006 2006-05-01 1189 1 1 37 https://biotaxa.org/Zootaxa/article/view/zootaxa.1189.1.1 journal article 10.11646/zootaxa.1189.1.1 1175­5334 5064269 B57B9D66-6191-4BFE-A17D-9CA97CEF4C7D Key to species of Branchiomma from tropical American coasts 1 Width of stylodes less than half width of radiolar rachis; shapes digitiform, sub­digitiform or strap­like........................................................................................................... 2 ­ Width of most or a few stylodes as broad (or broader) than width of rachis; shapes either tongue­like or with distal parts broader than their bases..................................... 5 2 Large, plump body with thorax about as long as wide; stylodes sub­digitiform with a few pairs in middle of radiole twice length of others (macrostylodes); ventral collar lappets fleshy with rounded apices; thoracic uncinus showing a single crest tooth in side view ....................................................................... B. nigromaculatum (Figs 1 & 2) ­ Small, slim body with thorax mostly longer than wide; stylodes digitiform or straplike; ventral collar lappets membranous and sub­triangular; thoracic uncinus showing two or three crest teeth in side view.............................................................................. 3 3 Thorax usually shorter than wide; stylodes digitiform with even gradation of lengths throughout radiole (no macrostylodes); short overlapping ventral lappets; thoracic torus showing nearly three crest teeth in side view ..................... B. curtum ( Figs 5 & 8 ) ­ Thorax longer than wide; stylodes digitiform or strap­like; ventral lappets long or short; thoracic torus showing two crest teeth in side view............................................ 4 4 Two or three pairs of strap­like macrostylodes in distal half of radiole, three or four times as long as neighbouring and other digitiform stylodes; radiolar eyes small, a third of width of radiolar skeleton; ventral collar lappets small and well separated ...... .............................................................................................................. B. bairdi ( Fig. 3 ) ­ Stylodes strap­like with even gradation of lengths throughout radiole (no macrostylodes); radiolar eyes large, larger than the width of internal radiolar skeleton; ventral collar lappets long, reaching bottom of first ventral shield when reflexed..................... .......................................................................................... B. illifei sp. nov. ( Figs 7 & 8 ) 5 Most stylodes with distal parts broader than their bases, often fluted giving foliose appearance, one of each pair often shorter than the other (around the middle of the radiole); large plump body with thorax wider than long; ventral lappets sub­triangular, fleshy and overlapping in reflexed position ................. B. coheni sp. nov. ( Figs 6 & 8 ) ­ Two or three pairs of tongue­like stylodes (length: breadth ratios 3:1 & 5:1) (macrostylodes) in distal half of radiole, with neighbouring and other pairs mostly small and digitiform; pairs of stylodes same length; body slim with thorax longer than wide; ventral lappets sub­circular ................................................................... B. conspersum ( Fig. 4 ).