126,446 research outputs found
Protoplanella leiae Houben, Proesmans & Artois 2022, sp. nov.
No full text<i>Protoplanella leiae</i> Houben, Proesmans & Artois sp. nov. <p>urn:lsid:zoobank.org:act: 449E44F6-12BB-4103-B70A-56E59B734A11</p> <p> <i>Protoplanella simplex</i> – Luther 1963: 5, 13–14, fig. 1, taf. 1. — Van Steenkiste <i>et al.</i> 2011: 2, 6–7, fig. 3.</p> Diagnosis <p>‘Protoplanellinae’ with adenal rhabdites anterior, dermal rhabdites absent. Eyes absent. Pharynx centrally positioned. Paired, globular testes occur laterally behind the pharynx. Vasa deferentia unite while entering the copulatory organ proximally. Copulatory organ with straight, muscular ejaculatory duct. Female bursa present. Blind sack attached to the genital atrium.</p> Etymology <p>The species epithet is dedicated to Leia Houben, youngest daughter of the first author (A.M. Houben).</p> Material examined <p> <b>Holotype</b> SPAIN • 1 spec., serially sectioned; La Puebla del Rio; 37°13′39″ N, 06°10′52″ W; 21 Mar. 2008; Van Steenkiste <i>et al.</i> 2011 leg.; mosses on bank of dried up temporal brook in open coniferous forest; KV.689; FMNH.</p> Paratype SPAIN • 1 spec., serially sectioned; same collection data as for holotype; paratype no. 824; HU. Description <p> Van Steenkiste <i>et al.</i> (2011) gave an excellent description of this animal, albeit described as <i>Protoplanella simplex</i>. Therefore, we refer to this publication for the illustration and description of <i>Protoplanella leiae</i> Houben, Proesmans & Artois sp. nov.</p> Discussion <p> See the general discussion on the genus <i>Protoplanella</i> Reisinger, 1924.</p> Previously known distribution <p> Tvärminne, Finland in mosses (Luther 1963; as <i>Protoplanella simplex</i>). La Puebla del Rio, Spain (Van Steenkiste <i>et al.</i> 2011; as <i>P. simplex</i>).</p>Published as part of <i>Houben, Albrecht M., Monnens, Marlies, Proesmans, Willem & Artois, Tom J., 2022, Limnoterrestrial ' Typhloplanidae' (Rhabdocoela, Platyhelminthes), with the description of four new species and a new genus, pp. 70-102 in European Journal of Taxonomy 798</i> on pages 96-98, DOI: 10.5852/ejt.2022.798.1671, <a href="http://zenodo.org/record/6323040">http://zenodo.org/record/6323040</a>
Faunulus nielsi Houben, Proesmans & Artois 2022, gen. et sp. nov.
No full text<i>Faunulus nielsi</i> Houben, Proesmans & Artois gen. et sp. nov. <p>urn:lsid:zoobank.org:act: E8B0D042-259A-427D-8F29-5DB6ED8C8411</p> <p>Fig. 2</p> Diagnosis <p>Provisionally the same diagnosis as the genus.</p> Etymology <p>The species epithet is dedicated to Niels Houben, son of the first author (A.M. Houben).</p> Material examined <p> <b>Holotype</b> AUSTRIA • 1 spec., live observations and sagittal sections; Kreuzberg near Weyer; 47°51′36″ N, 14°39′09″ E; 29 Aug. 2011; A.M. Houben and W. Proesmans leg.; forest soil of <i>Pinus</i>, <i>Sambucus</i>, <i>Corylus</i>, and <i>Cornus</i>; KV.686; FMNH.</p> <p> <b>Paratypes</b> AUSTRIA • 2 specs, live observations, one of which whole mounted; same collection data as for holotype; paratype no. 821; HU.</p> Description <p>Specimens about 1 mm long. The body shape is pointed anteriorly and blunt to rounded posteriorly (see Fig. 2A). On free-swimming specimens, a small tail can be observed. Both anterior and posterior ends possess very typical, strongly eosinophilic glands that appear rod-shaped, like big rhabdites, and are situated more or less parallel to each other. Rostrally, rhabdite glands (Fig. 2A: ar) are present and arranged in two groups. The distal part of the epidermis is completely filled with coarse, strongly eosinophilic secretions, which probably are dermal rhabdites (Fig. 2B: dr?). The protonephridiopores were not observed with certainty. The slightly forward slanted rosulate pharynx (Fig. 2A: ph) is located centrally.</p> <p>The gonopore (Fig. 2A–B: gp) is situated at ±65% of the body and connected to a genital atrium (Fig. 2A– B: ga) that is surrounded by muscles, although their orientation could not be observed with certainty.</p> <p>The paired, differently sized testes (Fig. 2A: t) lie in front of the pharynx and ventral to the paired vitellaria (Fig. 2A–B: vi). One testis is relatively large, while the other is barely visible. The paired vasa deferentia (Fig. 2B: vde) enter the copulatory organ laterally (Fig. 2A: co). Two layers of spiral muscles surround the 50 µm long copulatory organ, which bears an intracapsular seminal vesicle (Fig. 2B–C: vs) and a cirrus (Fig. 2B–C: cir). Large, coarse-grained, extracapsular eosinophilic glands (Fig. 2B: gg) are associated with the copulatory organ, although the point of entry remains uncertain. The 30 µm long cirrus is more or less straight and covered with spines in its distal part (see Fig. 2B–F: cir). The most distal part of the cirrus bears the larger spines and is enveloped in a conical, sclerotised pouch (Fig. 2C: sp).</p> <p>The female duct (Fig. 2B: fd) is relatively long and lined with a high, nuclear epithelium. Proximally it widens into a seminal receptacle (Fig. 2B: rs) that receives the oviduct and the vitelloduct.</p> Discussion <p> <i>Faunulus nielsi</i> Houben, Proesmans & Artois gen. et sp. nov. strongly resembles species of <i>Adenocerca</i> Reisinger, 1924 because of the combination of following features: centrally positioned pharynx, presence of tail glands and a spiny cirrus, and absence of a bursa (Van Steenkiste <i>et al.</i> 2010). However, <i>F. nielsi</i> Houben, Proesmans & Artois gen. et sp. nov. differs from all species of <i>Adenocerca</i> in having testes that lie rostral to the pharynx. In all species of <i>Adenocerca</i>, they are situated posterior to the pharynx and lie next to the copulatory organ. Moreover, there is a difference in size between the two testes of <i>F. nielsi</i> Houben, Proesmans & Artois gen. et sp. nov., which was never reported for <i>Adenocerca</i>. This size difference is consistent for all observed specimens. All species of <i>Adenocerca</i> either have no dermal rhabdites (<i>Adenocerca teshirogii</i> Kolasa, 1981) or dermal rhabdites occurring throughout the whole epidermis. Conversely, what we assume are dermal rhabdites occur solely in the caudal body part of <i>F. nielsi</i> Houben, Proesmans & Artois gen. et sp. nov. Because of the unique combination of features present in the new species described, we find it justified to erect a new genus within ‘Typhloplanidae’.</p> Remarks <p>Animals seem to feed on rotifers since trophi were found in the gut.</p>Published as part of <i>Houben, Albrecht M., Monnens, Marlies, Proesmans, Willem & Artois, Tom J., 2022, Limnoterrestrial ' Typhloplanidae' (Rhabdocoela, Platyhelminthes), with the description of four new species and a new genus, pp. 70-102 in European Journal of Taxonomy 798</i> on pages 75-77, DOI: 10.5852/ejt.2022.798.1671, <a href="http://zenodo.org/record/6323040">http://zenodo.org/record/6323040</a>
Data bundle for Houben et al. (2022) - Spectral Analysis of GW level measurements
No full textThis data bundle contains required information to reproduce the work of Timo Houben et al. (2022) submitted to Water Resources Research in September 2021 and entitled:
From dynamic groundwater level measurements to regional aquifer parameters – Assessing the power of spectral analysis
The bundle is subdivided into two parts:
1) Numerical Studies
- Numerical models, set up and run with OpenGeoSys (OGS) version 5.7.1-49-g5255869 (Kolditz et al., 2012, https://github.com/ufz/ogs5)
- model input files in every model directory
- extracted time series for selected locations in every model directory
- results of the spectral analysis (SpA) as csv in the combined_results folder
2) Field Study
- with groundwater level time series from observation wells in central Germany, the Main catchment
- and corresponding recharge time series modelled with mHM (Samaniego et al., 2010; Kumar et al., 2013; Zink et al., 2017)
- field_study: SpA of groundwater level time series in the main catchment
- field_study_sensitivity: SpA for sensitivity analysis of the field study
- field_study_correction: adjustment of aquifer length for observation well Birkach, field study
Directory Tree
```
.
├── LICENSE
├── README.md
├── field_study
│ ├── field_study
│ ├── field_study_sensitivity
│ │ ├── field_study_correction
│ └── plots
└── numerical_studies
├── determ_hetero
├── homogeneous
├── recharge
└── sto_hetero
```
License
The content of this data bundle is published under the license CC BY-NC (see LICENSE). If you want to reuse the data contained in the folder `/field_study/field_study/input/recharge` and file `/numerical_studies/recharge/mHM_meter_second.txt` use the following citations:
Samaniego et al., 2010; Kumar et al., 2013; Zink et al., 2017 from Houben et al., 2022
(see below for full references)
For all other files use the following citation
Houben et al., 2022
The raw data, from which the data contained in the folder `/field_study/field_study/input/gwm` was originally published by the Bavarian State Office for the Environment (https://www.gkd.bayern.de/de/grundwasser/oberesstockwerk) under CC BY 4.0. These data should be references with a relation to the Bavarian State office, processed by Houben et al, 2022.
Remarks
For further questions concerning the data bundle please contact Timo Houben ([email protected]).
Scripts which were used to set up the numerical models, perform the SpA and plot the results can be found in this gitlab repository: https://github.com/timohouben/houben_spectral_analysis.git
References
- Houben T, E. Pujades, T. Kalbacher, P. Dietrich, & S. Attinger. (2022). From dynamic groundwater level measurements to regional aquifer parameters – Assessing the power of spectral analysis, Water Resources Research, doi: 10.1002/2021WR031289
- Kolditz, O., Bauer, S., Bilke, L., Böttcher, N., Delfs, J. O., Fischer, T., . . . Zehner, B. (2012,731feb). OpenGeoSys: an open-source initiative for numerical simulation of thermo-hydro-mechanical/chemical (THM/c) processes in porous media. Environmental Earth Sciences,67(2), 589–599. doi: 10.1007/s12665-012-1546-x
- Kumar, R., Samaniego, L., & Attinger, S. (2013, jan). Implications of distributed hydrologic model parameterization on water fluxes at multiple scales and locations. Water Resources Research,49(1), 360–379. doi: 10.1029/2012wr012195
- Samaniego, L., Kumar, R., & Attinger, S. (2010, may). Multiscale parameter regionalization of a grid-based hydrologic model at the mesoscale. Water Resources Research,46(5). doi: 10.1029/2008wr007327
- Zink, M., Kumar, R., Cuntz, M., & Samaniego, L. (2017, mar). A high-resolution dataset of water fluxes and states for germany accounting for parametric uncertainty. Hydrology and Earth System Sciences,21(3), 1769–1790. doi: 10.5194/hess-21-1769-201
Bryoplana belgica Houben, Proesmans & Artois 2022, sp. nov.
No full text<i>Bryoplana belgica</i> Houben, Proesmans & Artois sp. nov. <p>urn:lsid:zoobank.org:act: 1F08C372-CBAE-45E6-BE50-144752F3D44B</p> <p>Fig. 5</p> Diagnosis <p> Species of <i>Bryoplana</i> with the ciliation reduced or completely lacking dorsally. Testes elongated, in the posterior body part, lateral to the copulatory organ. Copulatory organ with bent, sclerotised ejaculatory duct. Most proximal part of female duct forming a seminal receptacle.</p> Etymology <p>The epithet refers to the fact that the species was found in Belgium.</p> Material examined <p> <b>Holotype</b> BELGIUM • 1 spec., studied alive and serially sectioned; Koksijde, Oostduinkerke, nature reserve ‘De Zeebermduinen’; 51°08′22″ N, 02°41′26″ E; 30 Jul. 2011; A.M. Houben and W. Proesmans leg.; dry moss growing on dunes; KV.687; FMNH.</p> Description <p>The specimen is about 0.8 mm long. Both body ends are rounded (Fig. 5A–B). Free swimming specimens show a small tail. Adenal rhabdite glands (Fig. 5A: ar) are situated in two groups at ±25% of the body. Dermal rhabdites and protonephridiopores were not observed. The epidermis on the ventral body side is 4.5 µm high and entirely covered with locomotory cilia, while on the dorsal body side it is 3.5 µm high and ciliation is strongly reduced, even almost completely lacking. A slightly forward-slanted rosulate pharynx (Fig. 5A–B: ph) is located just rostral to the centre of the body.</p> <p>The gonopore (Fig. 5C–D: gp) is situated at ±80% of the body and connected to a genital atrium (Fig. 5A, C–D: ga), which is lined with a high, nucleated epithelium and surrounded by muscles, the orientation of which could not be observed with certainty.</p> <p>The elongated testes (Fig. 5A, C–D: t) lie at ±70% of the body and ventrally to the paired vitellaria (Fig. 5A–D: vi). They gradually taper into the broad vasa deferentia (Fig. 5C: vde), which laterally enter the copulatory organ (Fig. 5A: co). Circular muscles surround the 34 µm long copulatory organ, which includes an intracapsular seminal vesicle (Fig. 5C–E: vs) and a 22 µm long, strongly sclerotised ejaculatory duct (Fig. 5C–E: de). This ejaculatory duct is more or less straight at its proximal end and bends strongly (±100°) at the distal end. Coarse-grained eosinophilic glands are situated ventrally to the copulatory organ. Although the entrance into the copulatory organ could not be seen, these glands probably represent the prostate glands (Fig. 5D: gg?).</p> <p>The female duct (Fig. 5C–D: fd) is relatively long and lined with a nuclear epithelium. Proximally, it widens into a seminal receptacle (Fig. 5A, C–D: rs), which receives the short oviduct (Fig. 5D: od). The vitelloduct and female glands (Fig. 5D: fg) open into this female duct at the place where it connects to the seminal receptacle.</p> Discussion <p>The new species can readily be placed within ‘Typhloplanidae’ because it possesses all diagnostic features: a pharynx rosulatus, a single ovary, paired testes, and a single genital opening. Furthermore, the ventral position of the testes relative to the vitellaria indicates this species should be placed in ‘Protoplanellinae’, ‘Rhynchomesostominae’ Bresslau, 1933 or ‘Typhloplaninae’ Graff, 1905. However, the species’ general habitus and internal organisation differ markedly from the situation in the latter two subtaxa, and we therefore designate this species to ‘Protoplanellinae’.</p> <p> Most representatives of ‘Protoplanellinae’ have the pharynx situated in the midbody or posterior body half. Only select species have a pharynx in the anterior half of the body, these belong to <i>Achrochordonoposthia</i> Reisinger, 1924; <i>Bockia</i> Reisinger, 1924; <i>Bryoplana</i>; <i>Microcalyptorhynchus</i> Kepner & Ruebush, 1935, <i>Prorhynchella</i> Ruebush, 1939; and <i>Protopharyngiellona</i> Schwank, 1980. Some of these genera show very typical features: presence of a proboscis (<i>Microcalyptorhynchus</i>), presence of ciliated pits in the anterior body half (<i>Prorhynchella</i>), or the fact that the proboscis is of the doliiformis-type (<i>Bockia</i>). Lack of these features in our species indicates that it cannot be allocated to any of these genera. One of the most eye-catching features of <i>B. belgica</i> Houben, Proesmans & Artois sp. nov. is the lack of a bursa copulatrix, which in the remaining taxa is only the case for <i>Bryoplana</i>. We hence allocate our specimens to the latter genus, to which it indeed shows much resemblance.</p> <p> <i>Bryoplana belgica</i> Houben, Proesmans & Artois sp. nov. differs from <i>Bryoplana xerophila</i> by the presence of a sclerotised, curved ejaculatory duct, the presence of a seminal receptacle in the female system, and the fact that the dorsal body ciliation is very much reduced, or even lacking. The latter feature was also mentioned by Kolasa (1977) for <i>Ventrociliella romanae</i>, which he suggested to be an adaptation to limnoterrestrial habitats. However, in all other typical limnoterrestrial taxa, even in <i>B. xerophila</i>, the dorsal ciliation is present. Both species of <i>Bryoplana</i> were recovered from dried out moss – <i>B. xerophila</i> in the USA and <i>B. belgica</i> Houben, Proesmans & Artois sp. nov. in Western Europe – but indeed differ markedly in the extent of the dorsal body ciliation, undermining Kolasa’s (1977) hypothesis. The presence/absence of a seminal receptacle in the female system as a distinguishing character should be used with care at this moment. Indeed, the seminal receptacle in <i>B. belgica</i> Houben, Proesmans & Artois sp. nov. is simply a swelling of the female duct, and not a separate organ. As such, the absence of this structure in <i>B. xerophila</i> may be due to the specimens of Van Steenkiste <i>et al.</i> (2010) not having mated yet. However, as Van Steenkiste <i>et al.</i> (2010) investigated several live specimens and twelve serial sections, this seems unlikely. Regardless, the differences in body ciliation and construction of the copulatory organ proper clearly distinguish both species.</p>Published as part of <i>Houben, Albrecht M., Monnens, Marlies, Proesmans, Willem & Artois, Tom J., 2022, Limnoterrestrial ' Typhloplanidae' (Rhabdocoela, Platyhelminthes), with the description of four new species and a new genus, pp. 70-102 in European Journal of Taxonomy 798</i> on pages 81-83, DOI: 10.5852/ejt.2022.798.1671, <a href="http://zenodo.org/record/6323040">http://zenodo.org/record/6323040</a>
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Tancredi Conte di Lecce Re di Sicilia. Atti del Convegno internazionale di studio, Lecce 19-21 febbraio 1998
No full textPhaenocora aglobulata Houben and Artois, sp. nov.
No full textPhaenocora aglobulata Houben and Artois sp. nov. (Figs 1 D, 3 A–D) Holotype: A sagittally-sectioned specimen, Prairie Grove (Alabama, USA). Pond with diverse submersed vegetation (SMNH Type- 8671), 34 ° 31 ’0.48”N; 87 ° 30 ’4.68”W, 0 1 June 2009. Paratypes: Two sagitally- and one horizontally-sectioned specimens, same collection data as holotype (HU nos 565–566). Specimen (HU no. 567) subadult. Etymology: Name refers to the absence of the giant unicellular glands, which are typical in other members with a female genital system of the AGLOBULATA - type. Diagnosis: Animals about 1 mm long with an overall green or pinkish colour. Body pigmentation pink, confined to the anterior body region. Eyes pink. Zoochlorellae present in some specimens. Male copulatory organ of the duplex-type IIA. Female genital system of the AGLOBULATA - type, with a long female genital canal, a small genito-bursal duct lined with smaller unicellular glands, a heavily-lobed intestinal bursa, and a burso-intestinal duct with a valvular complex at the end. Large unicellular glands absent. Description: Animals about 1 mm long (measured on serial sections), body colour green or pinkish. Pink eyes, and pink pigmentation occurs in the anterior body part. Zoochlorellae are sometimes present. The male copulatory organ (Fig. 3 C) is of the duplex-type IIA. At its proximal side, its muscular diaphragm is lined with a protruded epithelium (Fig. 3 C: pr) at the point where the proximal and the distal bulbi connect. The cirrus clearly consists of three parts: a proximal part lined with a pseudocuticula and surrounded by very strong longitudinal muscles and rather weak circular muscles, a median part lined with a frayed nucleated epithelium and surrounded by less strong longitudinal and circular muscle layers, and a distal part lined by a low, nucleated epithelium and surrounded by longitudinal and circular muscle layers, with the longitudinal muscle layer increasing in strength. The female genital system (Fig. 3 B) is of the AGLOBULATA - type. The burso-intestinal duct (Fig. 3 B: dbi) is connected with the gut by a valvular apparatus (Fig. 3 B: va), without sphincter. The intestinal bursa (Fig. 3 B: bi) consists of several lobes. Both burso-intestinal duct and the intestinal bursa are lined with an irregular, thick, nucleated epithelium. The cell boundaries of this epithelium are not visible and nuclei are scarce. There is a small genito-bursal duct (Fig. 3 B: dgb), which is lined with smaller unicellular glands (as described by Gilbert 1938 b for P. adenticulata; also Fig. 3 B: lg). The female genital canal receives many secretion strands, which enter through the muscular sheet. Their cell bodies are situated at the ventral side of the body somewhat rostrally from the gonopore (Figs 3 B, C: gl 4).Published as part of Houben, Albrecht M., Steenkiste, Niels Van & Artois, Tom J., 2014, Revision of Phaenocora Ehrenberg, 1836 (Rhabditophora, Typhloplanidae, Phaenocorinae) with the description of two new species, pp. 301-354 in Zootaxa 3889 (3) on page 329, DOI: 10.11646/zootaxa.3889.3.1, http://zenodo.org/record/22490
I Cistercensi nel Mezzogiorno medioevale. Atti del Convegno internazionale ... Martano-Latiano-Lecce 25-27 febbraio 1992
No full text
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