Pseudoterschellingia ibarrae, Armenteros & Vincx & Decraemer, 2009
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publication ID |
https://doi.org/ 10.1080/00222930902767466 |
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persistent identifier |
https://treatment.plazi.org/id/039D87B5-AF72-FF86-FEE7-FEDC6F3EFE67 |
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treatment provided by |
Carolina |
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scientific name |
Pseudoterschellingia ibarrae |
| status |
gen. nov., sp. nov. |
Species Pseudoterschellingia ibarrae gen. nov., sp. nov.
( Figures 3 View Figure 3 , 4 View Figure 4 ; measurements in Table 4)
Material
One male holotype, 7 male paratypes, 11 female paratypes, 6 juveniles. Holotype: male, 319.I.4, deposited in ANC. Paratypes: male, slide RIT 749; female, slide RIT 750; deposited in RBINS .
Type locality
Cienfuegos Bay, Cuba; 22 ° 99 N, 80 ° 279 W.
Type habitat
Muddy bottom, depth 4–14 m.
Etymology
In honour of Prof. Dr María Elena Ibarra, Emeritus Professor of University of Havana, and tireless driving force of marine research in Cuba.
Description
Shape of body fusiform and slender; cuticle transversely striated; in some specimens transverse striae difficult to observe at mid-body region. Profile of head squarish; labial sensilla not observed in light microscopy, four submedian cephalic setae; four small submedian cervical setae far behind the amphidial fovea. A row of three to six ventral postanal somatic setae (3–6 Mm) present; no other somatic setae could be detected. Amphidial fovea crypto-spiral (0.3–0.4 cbd), with one and a half turns; anterior border of fovea located to 0.6–1.0 fovea diameters from anterior body end. Cheilostome small (2 Mm length), buccal cavity funnel-shaped, weakly cuticularized, without teeth or ring and surrounded by pharyngeal tissue. Small pigmented areas present on both sides of the body (ocelli?) in some specimens at level of cervical region (19–25 Mm from anterior end). Pharynx relatively long and muscular; posterior pharyngeal bulb with widened lumen clearly set-off and enlarged. Small triangular cardia surrounded by intestinal tissue; no pericardial cells. Nerve ring at level of mid-portion of pharynx. Secretory–excretory pore just anterior to pharyngeal bulb. Ventral gland cell along anterior part of intestine, relatively far from cardia. Tail conical over more than two-thirds of its length; the last portion relatively cylindrical and ‘‘clavated’’, with small spinneret. Three caudal glands with a common duct restricted to the tail.
Males monorchic; spicules paired, curved, non-cephalated and relatively simple in structure, Gubernaculum with strongly cuticularized dorsocaudal apophyses.
Females monodelphic–didelphic with ovary outstretched. Vulva notably rear in the body and conspicuous, very close to the anus.
Diagnosis
In addition to generic features, the features that characterized the new species are the following: only four submedian cephalic setae visible in light microscopy, four submedian cervical short setae, absence of precloacal supplements, the relatively simple and curved spicules and largest portion of the tail conical.
Remarks
Pseudoterschellingia ibarrae is the type species of the monospecific genus Pseudoterschellingia . Like other genera of monhysterids (including Terschellingia and Terschellingioides ) the new species appears to be characteristic of muddy hypoxic substrates. The coiling of the posterior part of the body and the presence of the green intestinal globules were common in the specimens studied; globules were reported also for Terschellingioides filiforme Timm 1967 and found by us in several putative deposit-feeding species from Cienfuegos Bay.
| RBINS |
Royal Belgian Institute of Natural Sciences |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.