Branchiomma
Creators: name: Tovar-Hernández, María Ana
name: Knight-Jones, Phyllis
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Sabellida
Sabellidae
Branchiomma

description: 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).
description: Published as part of Tovar-Hernández, María Ana & Knight-Jones, Phyllis, 2006, Species of Branchiomma (Polychaeta: Sabellidae) from the Caribbean Sea and Pacific coast of Panama, pp. 1-37 in Zootaxa 1189 (1) on pages 6-7, DOI: 10.11646/zootaxa.1189.1.1, http://zenodo.org/record/5064269