Hypsibius cf. scabropygus
| 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{Zawierucha2014ZooKeys408, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Zawierucha2014ZooKeys408">{{Citation See also the citation download page at the journal. |
Genus: Hypsibius
Name
Hypsibius scabropygus Cuénot, 1929 – Wikispecies link – Pensoft Profile
Localities and specimen numbers
XI: 1 simplex, XII: 1 specimen, XIV: 34 specimens (including 4 simplexes), XV: 24 specimens (including 6 simplexes).
Description
(measurements in Table 1). Adults. Body transparent/white (after preparation), eyes present in 6 of 15 (40%) specimens mounted in Hoyer’s medium (Fig. 1). Dorsal cuticle sculptured: from head to legs II without tubercles but clearly thickened, from legs II to the caudal end of the body (including legs IV) with irregular tubercles and platelets. Tubercles increasing in size from the anterior to the posterior part of the body, reaching maximum dimensions between legs III and IV, where tubercles sometimes merge and form irregular platelets (Figs 2–5). Irregular tubercles 1.0–6.0 μm in diameter. Ventral cuticle smooth (i.e. without sculpturing). Gibbosities and cuticular pores absent.
| CHARACTER | N | RANGE | MEAN | SD | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| µm | pt | µm | pt | µm | pt | ||||||
| Body length | 14 | 183 | – | 293 | 808 | – | 1132 | 235 | 949 | 33 | 97 |
| Buccopharyngeal tube | |||||||||||
| Buccal tube length | 15 | 22.0 | – | 28.2 | – | 24.6 | – | 2.0 | – | ||
| Stylet support insertion point | 15 | 12.0 | – | 15.9 | 51.3 | – | 57.1 | 13.5 | 54.9 | 1.1 | 1.6 |
| Buccal tube external width | 15 | 1.5 | – | 2.0 | 6.5 | – | 8.0 | 1.8 | 7.2 | 0.2 | 0.5 |
| Buccal tube internal width | 15 | 0.6 | – | 0.9 | 2.1 | – | 3.4 | 0.7 | 2.7 | 0.1 | 0.4 |
| Placoid lengths | |||||||||||
| Macroplacoid 1 | 15 | 1.8 | – | 3.2 | 7.7 | – | 12.3 | 2.4 | 9.6 | 0.4 | 1.3 |
| Macroplacoid 2 | 15 | 1.7 | – | 2.7 | 7.2 | – | 11.3 | 2.2 | 8.9 | 0.3 | 1.1 |
| Macroplacoid row | 15 | 4.7 | – | 6.3 | 19.1 | – | 26.5 | 5.3 | 21.7 | 0.5 | 1.8 |
| Claw 1 lengths | |||||||||||
| External base | 14 | 2.2 | – | 4.5 | 9.1 | – | 17.2 | 3.5 | 14.1 | 0.7 | 2.1 |
| External primary branch | 14 | 4.0 | – | 8.8 | 18.2 | – | 36.1 | 6.9 | 28.1 | 1.5 | 5.0 |
| External secondary branch | 14 | 2.3 | – | 5.9 | 10.5 | – | 24.4 | 4.4 | 17.9 | 1.0 | 3.9 |
| Internal base | 12 | 2.1 | – | 4.1 | 9.3 | – | 15.5 | 3.3 | 13.4 | 0.6 | 1.8 |
| Internal primary branch | 12 | 3.8 | – | 5.9 | 16.0 | – | 23.5 | 4.8 | 19.3 | 0.6 | 2.0 |
| Internal secondary branch | 12 | 2.4 | – | 4.3 | 9.9 | – | 16.5 | 3.3 | 13.3 | 0.6 | 2.0 |
| Claw 2 lengths | |||||||||||
| External base | 11 | 3.0 | – | 5.2 | 12.4 | – | 19.9 | 4.1 | 16.7 | 0.7 | 2.2 |
| External primary branch | 13 | 6.7 | – | 10.4 | 29.7 | – | 43.7 | 8.5 | 34.7 | 1.3 | 4.4 |
| External secondary branch | 13 | 4.3 | – | 6.7 | 19.0 | – | 27.2 | 5.4 | 21.9 | 0.7 | 2.6 |
| Internal base | 10 | 2.4 | – | 4.5 | 10.9 | – | 18.9 | 3.6 | 14.6 | 0.7 | 2.2 |
| Internal primary branch | 12 | 4.0 | – | 6.7 | 17.7 | – | 27.2 | 5.4 | 22.0 | 0.9 | 2.9 |
| Internal secondary branch | 12 | 2.6 | – | 5.4 | 11.8 | – | 22.0 | 4.1 | 16.7 | 0.9 | 3.0 |
| Claw 3 lengths | |||||||||||
| External base | 9 | 2.7 | – | 6.2 | 11.9 | – | 23.8 | 4.3 | 17.3 | 1.0 | 3.5 |
| External primary branch | 9 | 7.2 | – | 10.4 | 29.3 | – | 43.7 | 8.8 | 35.7 | 1.1 | 4.4 |
| External secondary branch | 9 | 3.6 | – | 6.5 | 12.8 | – | 27.3 | 5.2 | 21.0 | 1.0 | 4.3 |
| Internal base | 11 | 2.3 | – | 4.1 | 10.5 | – | 17.2 | 3.4 | 13.9 | 0.6 | 1.9 |
| Internal primary branch | 13 | 3.8 | – | 6.5 | 17.3 | – | 27.3 | 5.4 | 21.8 | 0.9 | 3.1 |
| Internal secondary branch | 12 | 2.7 | – | 6.1 | 12.2 | – | 24.8 | 3.9 | 16.0 | 0.9 | 3.5 |
| Claw 4 lengths | |||||||||||
| Anterior base | 13 | 3.3 | – | 5.6 | 12.8 | – | 20.1 | 4.1 | 16.8 | 0.6 | 2.2 |
| Anterior primary branch | 13 | 4.4 | – | 7.5 | 19.5 | – | 31.1 | 5.9 | 24.2 | 1.1 | 3.9 |
| Anterior secondary branch | 11 | 3.1 | – | 13.2 | 13.0 | – | 47.3 | 4.8 | 18.9 | 2.9 | 9.7 |
| Posterior base | 12 | 2.7 | – | 5.4 | 12.3 | – | 21.5 | 4.5 | 18.2 | 0.9 | 3.1 |
| Posterior primary branch | 12 | 4.9 | – | 14.9 | 22.0 | – | 60.6 | 10.3 | 41.9 | 2.9 | 11.2 |
| Posterior secondary branch | 12 | 4.0 | – | 6.5 | 15.4 | – | 25.6 | 5.2 | 21.2 | 0.9 | 3.4 |
Eggs. Unknown.
Remarks
Hypsibius scabropygus has been recorded from many localities, mostly in the Holarctic (McInnes 1994[1]). In general, our specimens correspond to the original description by Cuénot (1929[2], 1932[3]) and later descriptions by Marcus (1930)[4] (=Hypsibius callimerus spec. nov.), and by Ramazzotti and Maucci (1983)[5]. However, importantly, none of the above mentioned descriptions reported a bar between anterior and posterior claws IV, which is present in all our specimens. Given the bar is small, it is possible that it was overlooked by Cuénot and later authors. If, however, Hypsibius scabropygus does not have the bar, then our specimens should probably be classified as a new species. Thus, until Hypsibius scabropygus is redescribed, our Latvian and Estonian records should be regarded as Hypsibius cf. scabropygus. As there is a possibility of our specimens belonging to a new species, we provide standard morphometrics (Table 1) and photographs (Figs 1–7).
Taxon Treatment
- Zawierucha, K; Dziamięcki, J; Jakubowska, N; Michalczyk, Ł; Kaczmarek, Ł; 2014: New tardigrade records for the Baltic states with a description of Minibiotus formosus sp. n. (Eutardigrada, Macrobiotidae) ZooKeys, 408: 81-105. doi
Other References
- ↑ McInnes S (1994) Zoogeographic distribution of terrestrial/freshwater tardigrades from current literature. Journal of Natural History 28: 257-352. doi: 10.1080/00222939400770131
- ↑ Cuénot L (1929) Description d’un tardigrade nouveau de la faune francaise. Archives d’anatomie Microscopique 25: 121-125.
- ↑ Cuénot L (1932) Tardigrades. In: Lechevalier P (Ed) Faune de France 24: 1-96.
- ↑ Marcus E (1930) Beiträge zur Tardigradensystematik. Zoologische Jahrbuecher Systematik 59: 363-386.
- ↑ Ramazzotti G, Maucci W (1983) Il Phylum Tardigrada. Memorie dell’Istituto Italiano di Idrobiologia 41: 1-1012.
Images
|
