Ototyphlonemertes (parmula) lei, 1863

Kajihara, Hiroshi, Tamura, Kotaro & Tomioka, Shinri, 2018, Histology-free Descriptions for Seven Species of Interstitial Ribbon Worms in the Genus Ototyphlonemertes (Nemertea: Monostilifera) from Vietnam, Species Diversity 23 (1), pp. 13-37 : 24

publication ID

https://doi.org/ 10.12782/specdiv.23.13

publication LSID

lsid:zoobank.org:pub:870A4A76-9855-46CE-A0A5-7E7870F4E548

DOI

https://doi.org/10.5281/zenodo.5567318

persistent identifier

https://treatment.plazi.org/id/CF0387C3-D505-B15B-FC72-A06AFAEBFA73

treatment provided by

Felipe

scientific name

Ototyphlonemertes (parmula) lei
status

 

Ototyphlonemertes (parmula) lei sp. nov.

( Fig. 8 View Fig )

Material examined. One specimen from Dam Ngoai; ICHUM 5365 View Materials (holotype) .

Description. Body length 4.9 mm, width 0.2 mm (n =1). Epidermis whitish ( Fig. 8A View Fig ); cephalic furrow postcerebrally; tissues around brain slightly reddish; cirri present in both anterior and posterior ends of body. Foregut–in-testine junction not distinct ( Fig. 8B View Fig ). Statolith polygranular ( Fig. 8C View Fig ), 9.3 µm in diameter (n =1), consisting of about 7 granules; statocyst 15.9 µm in diameter (n =1). Proboscis diaphragm short ( Fig. 8B View Fig ); two accessory stylet pouches, lateral to central-stylet basis, each containing 4 and 5 accessory stylets, all directing forward; central stylet (as well as accessory stylets) spiral ( Fig. 8D View Fig ), 54.7 µm long; basis 43.2 µm long, 8.0 µm wide ( Fig. 8D View Fig ), with each ridge twisting about 1.5 times; basis length/width ratio 5.4; middle chamber short; posterior chamber vesicular, without specialized anterior portion ( Fig. 8B View Fig ). Intestinal diverticula deep. Posterior adhesive plate with cells containing dark contents. Gonads found in posterior half of intestinal region, alternating more or less regularly with intestinal lateral diverticula.

Distribution. So far known only from the type locality, the island of Dam Ngoai, Vietnam.

Etymology. The specific name is a noun in the genitive case, after Dr Doan Dung Le at the Ho Chi Minh City University of Food Industry, Vietnam, who kindly coordinated HK’s sampling trip to Phu Quoc.

Remarks. In the phylogenetic tree, Ototyphlonemertes ( parmula ) lei sp. nov. appeared to be sister to the rest of the O. parmula species group ( Fig. 2 View Fig ), which was mostly represented by the Fila morpho-group of Leasi et al. (2016).

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