Data/hora: 04/06/2024 10:26:26

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	02/12/2022	
Data da última atualização: 	02/12/2022	
Autoria: 	RUPP, G. S.; MARTINS, L.; MARENZI, A.; COSTA, R. C.	
Título: 	A rare specimen of bifurcated Holothuria (Halodeima) grisea (Echinodermata: Holothuroidea) from southern Brazil.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	In: CONGRESO LATINOAMERICANO DE EQUINODERMOS, 5., 2022, Argentina. Resúmenes... Argentina: Rede Latinoamericana de Equinodremos, 2022. p. 27	
Idioma: 	Inglês	
Conteúdo: 	Holothurians    are     echinoderms     with    fusiform        and     elongated       bodies  along   the     oralaboral      axis.   The     anterior        
region  presents        a       crown   of       tentacles      around   the    mouth,  
followed        by      the     pharynx,        surrounded      by      a       calcareous      ring,   the     esophagus,      and     the     
digestive        tract. Holothuria      (Halodeima) grisea Selenka,     1867    is      a       common  species 
in       intertidal      regions         along   the     Brazilian       coast,  with    the     southern        limit   of     
distribution    in      the     State   of      Santa   Catarina,       Brazil. Between 2019    and     2022,   samples 
of      this    species were    inspected as    part    of      a       populational    and     reproductive    study   in      
Santa   Catarina.       In      this    period, 2,574   specimens       were    observed,       and     one     stood   out     
for     presenting       the    anterior        part    of       the    body    bifurcated,     with     two     tentacle       crowns  
and     two     mouths. This    organism        was     collected       at      Armação       do      Itapocorói,        Penha,  on      
February        24,     2021,   and      taken   to      the    laboratory,     where   it      was     kept    alive    for     three  
weeks    for    observations    of      its      functional     anatomy and     behavior.       Subsequently,    the    
organism         was     anesthetized    with    7%      magnesium       chloride        and     fixed   in      10%    
formalin        for     further analysis.       The     specimen,       when    contracted,     had     a       length  of      11.6    
cm,      a       width   of      3.6     cm      in      the     median  region,         and     a       weight  of      70.86   g       after   the    
elimination      of      the     internal        liquid.         The     width   of      the     anterior        region  (withdrawn     
tentacles)      was     3.75    cm.     It      was     found   that    the     tentacles       of      both    crowns  (25     peltate 
tentacles        each    crown)  were    functional      and     active  in      capturing       food    particles,     
driving  them    to      the     mouths,         and     frequently      adhering        to      the     surface         of      the    
container.       Images  were    recorded        through         digital         photos  and     videos.         This    is     
probably         the     first   in      vivo observation        of      a       bifurcated      holothurian,    a       rare   
phenomenon      in      Holothuroidea.  Preliminary     analyses        of      the     internal        anatomy using   
micro-computed  tomography      revealed        two     complete        calcareous      rings,  and     further 
studies will    elucidate       whether other   parts   of      the     digestive       system  are     duplicated.	
Thesagro: 	Holothuria grisea; pepinos-do-mar.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_55785.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
Exemplares: 	Epagri-Sede - (107789-1) - UPC - PL - DD -  -  -  - DIS