Allodicranophorus
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{De2015Zootaxa4028, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="De2015Zootaxa4028">{{Citation |
Ordo: Ploima
Familia: Proalidae
Name
Allodicranophorus De Smet, Willem H., 2015 – Wikispecies link – Pensoft Profile
- Allodicranophorus De Smet, Willem H., 2015, Zootaxa 4028: 179-181.
Diagnosis
Diagnosis. Trophi symmetrical. Incus flat. Rami elongate; opening of subbasal chambers lateral, opening of basal chambers dorsal; rami tips blunt with minute medially directed blunt toothlet; inner margins without teeth; alulae absent. Fulcrum short, strongly expanded distally. Unci each with two equally long teeth composed of head and shaft. Manubria ramus length, with large head and rod-shaped cauda. Epipharynx two more or less trapezoid and slightly asymmetrical robust plates with large ventral opening.
Materials Examined
Type species.Allodicranophorus bulgaricus (Althaus, 1957)nov. comb. for Dicranophorus bulgaricus Althaus, 1957.
Etymology
Etymology. The name Allodicranophorus combines the Greek allos, meaning different, and Dicranophorus, alluding to the differences in trophi structure with the latter.
Materials Examined
Material. Several specimens from most of the study area (see Tab. 2 species list). A female in a permanent, glycerine glass slide mount deposited in the Royal Belgian Institute of Natural Sciences (RBINS), Brussels, Belgium, No. IG 33082, RIR 225.
Discussion
Comments. The external morphology of the species is typically dicranophorid-like, but the morphology of the trophi, which is the most important character state in the establishment of genera in Dicranophoridae (De Smet 1997), is completely aberrant. The unique combination of characters arguing for the establishment of a new genus of Dicranophoridae are: (1) the short distally enlarged fulcrum, (2) the manubria with large head of peculiar shape, (3) the two irregularly shaped hollow epipharyngeal plates, (4) the subbasifenestrae opening laterally, (5) the absence of distinct and medially projecting apical rami teeth, resulting in a wedge-shaped, distally open median rami opening.
Description
Description of female. Body fusiform (Fig. 22), sub-cylindrical, in lateral view weakly arched dorsally, almost straight ventrally. Head, trunk and foot distinctly offset by transversal folds; trunk with two additional transversal and two latero-dorsal folds. Rostrum small, rounded. Corona small, oblique frontal. Dorsal antenna near middle of head. Tail prominent, keeled, projecting beyond basal 1 / 3 of foot pseudosegment. Foot fairly long, conical-cylindrical, a single pseudosegment. Toes (Fig. 22 C, D) fairly short, slender, almost cylindrical with short acute end; distal end in lateral view slightly decurving ventrally. Eyespots absent. Brain saccate, large. Retrocerebral organ present; cerebral sac large, hemispherical, posteriorly on brain; subcerebral glands present. Proventriculus, stomach and intestine very weakly demarcated. Gastric glands globular, weakly lobate, stalked, ventral. Pedal glands weakly stalked, foot length. Vitellarium with twelve nuclei. Oviparous. Trophi (Fig. 22 E, 23) modified forcipate, symmetrical. Incus flat. Rami elongate, alulae absent; basal chambers larger than subbasal ones, proximal margin broadly rounded; subbasal chambers somewhat projecting beyond basal ones caudally, proximal margin more or less angular laterally; ending distally in shallow blunt projection whereupon unci rest; subbasifenestrae lateral, small, rounded-triangular, basifenestrae dorsal, large, ellipsoid; median rami opening wedge-shaped, distally open; inner margins of rami without teeth, distinct apical rami teeth absent, basal chambers apically with very short blunt, medially directed knob. Fulcrum short, in dorsal/ ventral view narrow proximally, strongly expanded distally, in lateral view slightly narrowing towards expanded distal end. Unci each with two equally long teeth composed of head and shaft; head dorsal tooth c. ¼ tooth length, head of ventral tooth c. ½ tooth length. Manubria ramus length, with large head and rod-shaped cauda; outer side with large opening of median (?) chamber, other chambers reduced. Epipharynx (Figs 22 F, 23 D, E) two more or less trapezoid and slightly asymmetrical robust plates, with marginal extensions and large ventral opening. Measurements. Body (N= 5): total length 190‒260 µm, toe 28‒32 µm; trophi (N= 5) length 14.3 −16.0 µm, incus 13.3‒14.7 µm, ramus 9.6‒10.9 µm, fulcrum 3.1‒4.9 µm, uncus 8.7‒11.6 µm, manubrium 11.0‒ 14.6 µm, epipharynx 7.3 ‒9.0 × 5.3‒6.4 µm; amictic egg 63‒88 × 41‒53 µm.
Distribution
Distribution and ecology.Allodicranophorus bulgaricus was to date only reported from the sublittoral (mesopsammon from 0.5 and 1 m) of its type locality, Varna, Sosopol, Bulgaria, Black Sea (Althaus 1957) and the sublittoral of Elba Island (De Smet 2007). In the present study it proved a rather common species of sublittoral psammon from the Costa Blanca, Golfe du Lion, Côte d’Azur, and Elba Island. It was found from 50 m to 5 km off shore, depth 15−50 m, June, August, September, October, water temperature 16−25 °C.
Taxon Treatment
- De Smet, Willem H.; 2015: Rotifera from the Mediterranean Sea, with description of ten new species, Zootaxa 4028: 179-181. doi
This treatment was originally uploaded by Plazi, compare this treatment on Plazi. Unless this treatment has been substantially changed on Species-ID, Plazi requests to maintain a link back to the original repository.
