Balanoglossus

Taxobox
name = "Balanoglossus"
regnum = Animalia
phylum = Hemichordata
classis = Enteropneusta
familia = Ptychoderidae
genus = "Balanoglossus"
genus_authority = Delle Chiaje, 1829
subdivision_ranks = Species
subdivision = See text.

"Balanoglossus" is an ocean-dwelling acorn worm (Enteropneusta) genus of great zoological interest because it is, like all Hemichordates, an "evolutionary link" between invertebrates and vertebrates. "Balanoglossus" is a deuterostome, and resembles the Ascidians or sea squirts, in that it possesses branchial openings, or "gill slits", but no notochord and no chorda. It does have a stomochord, however, which is gut chord within the collar. Their heads may be as small as 2.5 mm (1/10 in) or as large as 5 mm (1/5 in).

pecies

* "Balanoglossus apertus" (Spengel, 1893)
* "Balanoglossus aurantiacus" (Girard, 1853)
* "Balanoglossus australiensis" (Hill, 1894)
* "Balanoglossus biminiensis" (Willey, 1899)
* "Balanoglossus capensis" (Gilchrist, 1908)
* "Balanoglossus carnosus" (Willey, 1899)
* "Balanoglossus clavigerus" (Delle Chiaje, 1829)
* "Balanoglossus gigas" (Fr. Müller in Spengel, 1893)
* "Balanoglossus jamaicensis" (Willey, 1899)
* "Balanoglossus misakiensis" (Kuwano, 1902)
* "Balanoglossus natalensis" (Gilchrist, 1908)
* "Balanoglossus numeensis" (Maser, 1913)
* "Balanoglossus occidentalis" (Ritter, 1902)
* "Balanoglossus proterogonius" (Belichov, 1928)
* "Balanoglossus salmoneus" (Belichov, 1928)
* "Balanoglossus stephensoni" (van der Horst, 1937)