Featured Research

from universities, journals, and other organizations

New species of horseshoe worm discovered in Japan after a 62 year gap

Date:
April 4, 2014
Source:
Pensoft Publishers
Summary:
A team of scientists recently described a new species of horseshoe worm Phoronis emigi from sandy bottom at 33 m depth in Amakusa, Japan. This is the first new horseshoe worm species since the discovery of Phoronis pallida by Silén in 1952, 62 years ago.

This is a living Phoronis ijimai, extending its lophophore.
Credit: Dr. Masato Hirose; CC-BY 4.0

The horseshoe worm is a worm-like marine invertebrate inhabiting both hard and soft substrates such as rock, bivalve shells, and sandy bottom. The name "horseshoe" refers to the U-shaped crown of tentacles which is called "lophophore." Horseshoe worms comprise a small phylum Phoronida, which contains only ten species decorating the bottom of the oceans.

The new species Phoronis emigi, the eleventh member of the group described in the open access journal ZooKeys, comes after a long 62 year gap of new discoveries in the phylum. It is unique in the number and arrangement of body-wall muscle bundles and the position of the nephridia which is the excretory organ of some invertebrates. The new species is morphologically similar to sand-dwelling species Phoronis psammophila and it is also closely related to Phoronis hippocrepia, which inhabits hard substrate.

The morphology of the topotypes for Phoronis ijimai is also described in this study after 117 years since its original description. The combination of a detailed observation of the internal morphologies and the molecular phylogenetic analyses including the topotypes ensure a synonymy between P. ijimai and the northeastern pacific species Phoronis vancouverensis that has long been disputed.

"It is necessary to use both internal anatomy and molecular data for reveal the global diversity of horseshoe worm. The known phoronid diversity still remains low, with all specimens reported from limited habitats and the localities by the limited reports. Investigations at new localities or habitats may yield additional species in the future," explains Dr Masato Hirose, Atmosphere and Ocean Research Institute, The University of Tokyo, Japan.


Story Source:

The above story is based on materials provided by Pensoft Publishers. The original story is licensed under a Creative Commons License. Note: Materials may be edited for content and length.


Journal Reference:

  1. Masato Hirose, Ryuma Fukiage, Toru Katoh, Hiroshi Kajihara. Description and molecular phylogeny of a new species of Phoronis (Phoronida) from Japan, with a redescription of topotypes of P. ijimai Oka, 1897. ZooKeys, 2014; 398: 1 DOI: 10.3897/zookeys.398.5176

Cite This Page:

Pensoft Publishers. "New species of horseshoe worm discovered in Japan after a 62 year gap." ScienceDaily. ScienceDaily, 4 April 2014. <www.sciencedaily.com/releases/2014/04/140404092935.htm>.
Pensoft Publishers. (2014, April 4). New species of horseshoe worm discovered in Japan after a 62 year gap. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2014/04/140404092935.htm
Pensoft Publishers. "New species of horseshoe worm discovered in Japan after a 62 year gap." ScienceDaily. www.sciencedaily.com/releases/2014/04/140404092935.htm (accessed July 31, 2014).

Share This




More Plants & Animals News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) — Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Concern Grows Over Worsening Ebola Crisis

Concern Grows Over Worsening Ebola Crisis

AFP (July 30, 2014) — Pan-African airline ASKY has suspended all flights to and from the capitals of Liberia and Sierra Leone amid the worsening Ebola health crisis, which has so far caused 672 deaths in Guinea, Liberia and Sierra Leone. Duration: 00:43 Video provided by AFP
Powered by NewsLook.com
At Least 20 Chikungunya Cases in New Jersey

At Least 20 Chikungunya Cases in New Jersey

AP (July 30, 2014) — At least 20 New Jersey residents have tested positive for chikungunya, a mosquito-borne virus that has spread through the Caribbean. (July 30) Video provided by AP
Powered by NewsLook.com
Xtreme Eating: Your Daily Caloric Intake All On One Plate

Xtreme Eating: Your Daily Caloric Intake All On One Plate

Newsy (July 30, 2014) — The Center for Science in the Public Interest released its 2014 list of single meals with whopping calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:  

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile iPhone Android Web
      Follow Facebook Twitter Google+
      Subscribe RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins