A Reminiscence of the Nicaraguan Filibusters.

n/

Stable carbon isotopic composition of <i>Mytilus edulis</i> shells: relation to metabolism, salinity, d¹³C_DIC and phytoplankton

Bivalve shells can potentially record the carbon isotopic signature of dissolved inorganic carbon (d13CDIC) in estuarine waters, thereby providing information about past estuarine biogeochemical cycles. However, the fluid from which these animals calcify is a ‘pool’ of metabolic CO2 and external dissolved inorganic carbon (DIC). The incorporation of respired 13C-depleted carbon into the skeletons of aquatic invertebrates is well documented, and may affect the d13C record of the skeleton. Typically, less than 10% of the carbon in the skeleton is metabolic in origin, although higher amounts have been reported. If this small offset is more or less constant, large biogeochemical gradients in estuaries may be recorded in the d13C value of bivalve shells. In this study, it is assessed if the d13C values of Mytilus edulis shells can be used as a proxy of d13CDIC as well as providing an indication of salinity. First, the d13C values of respired CO2 (d13CR) were considered using the d13C values of soft tissues as a proxy for d13CR. Along the strong biogeochemical gradient of the Scheldt estuary (The Netherlands–Belgium), d13CR was linearly related to d13CDIC (r2 = 0.87), which in turn was linearly related to salinity (r2 = 0.94). The mussels were highly selective, assimilating most of their carbon from phytoplankton out of the total particulate organic carbon (POC) pool. However, on a seasonal basis, tissue d13C varied differently than d13CDIC and d13CPOC, most likely due to lipid content of the tissue. All shells contained less than 10% metabolic carbon, but ranged from near zero to 10%, thus excluding the use of d13C in these shells as a robust d13CDIC or salinity proxy. As an example, an error in salinity of about 5 would have been made at one site. Nevertheless, large changes in d13CDIC (>2‰) can be determined using M. edulis shell d13C

Stable carbon isotopic composition of Mylilus edulis shells: relation to salinity, phytoplankton and metabolism

Bivalve shells can potentially record the carbon isotopic signature of dissolved inorganic carbon (delta C-13(DIC)) in estuarine waters, thereby providing information about past estuarine biogeochemical cycles. However, the fluid from which these animals calcify is a 'pool' of metabolic CO2 and external dissolved inorganic carbon (DIC). The incorporation of respired C-13- depleted carbon into the skeletons of aquatic invertebrates is well documented, and may affect the delta C-13 record of the skeleton. Typically, less than 10% of the carbon in the skeleton is metabolic in origin, although higher amounts have been reported. If this small offset is more or less constant, large biogeochemical gradients in estuaries may be recorded in the delta C-13 value of bivalve shells. In this study, it is assessed if the delta C-13 values of Mytilus edulis shells can be used as a proxy of delta C-13(DIC) as well as providing an indication of salinity. First, the delta C-13 values of respired CO2 (delta C-13(R)) were considered using the delta C-13 values of soft tissues as a proxy for delta C-13(R). Along the strong biogeochernical gradient of the Scheldt estuary (The Netherlands-Belgium), delta C-13(R) was linearly related to delta C-13(DIC) (r(2) = 0.87), which in turn was linearly related to salinity (r(2) = 0.94). The mussels were highly selective, assimilating most of their carbon from phytoplankton out of the total particulate organic carbon (POC) pool. However, on a seasonal basis, tissue delta C-13 varied differently than delta C-13(DIC) and delta C-13(POC), most likely due to lipid content of the tissue. All shells contained less than 10% metabolic carbon, but ranged from near zero to 10%, thus excluding the use of delta C-13 in these shells as a robust delta C-13(DIC) or salinity proxy. As an example, an error in salinity of about 5 would have been made at one site. Nevertheless, large changes in delta C-13(DIC) (> 2 parts per thousand) can be determined using M. edulis shell delta C-13. (c) 2006 Elsevier Ltd. All rights reserved.status: publishe

Biomineralization in living hypercalcified demosponge: Toward a shared mechanism

Massive skeletons of living hypercalcified sponges, representative organisms of basal Metazoa, are uncommon models to improve our knowledge on biomineralization mechanisms and their possible evolution through time. Eight living species belonging to various orders of Demospongiae were selected for a comparative mineralogical characterization of their aragonitic or calcitic massive basal skeleton. The latter was prepared for scanning and transmission electron microscopy (SEM and TEM), selected-area electron diffraction (SAED) and X-ray diffraction (XRD) analyses. SEM results indicated distinctive macro- and micro-structural organizations of the skeleton for each species, likely resulting from a genetically dictated variation in the control exerted on their formation. However, most skeletons investigated shared submicron to nano-scale morphological and crystallographical patterns: (1) single-crystal fibers and bundles were composed of 20 to 100. nm large submicronic grains, the smallest structural units, (2) nano-scale likely organic material occurred both within and between these structural units, (3) {1. 1. 0} micro-twin planes were observed along aragonitic fibers, and (4) individual fibers or small bundles protruded from the external growing surface of skeletons. This comparative mineralogical study of phylogenetically distant species brings further evidence to recent biomineralization models already proposed for sponges, corals, mollusks, brachiopods and echinoderms and to the hypothesis of the universal and ancestral character of such mechanisms in Metazoa. © 2013 Elsevier Inc.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Corrigendum to “Biomineralization in living hypercalcified demosponges: toward a shared mechanism?” [J. Struct. Biol. 183 (2013) 441–454]

SCOPUS: er.jinfo:eu-repo/semantics/publishe

Multi-scale mineralogical characterization of the hypercalcified sponge Petrobiona massiliana (Calcarea, Calcaronea)

The massive basal skeleton of a few remnant living hypercalcified sponges rediscovered since the 1960s are valuable representatives of ancient calcium carbonate biomineralization mechanisms in basal Metazoa. A multi-scale mineralogical characterization of the easily accessible Mediterranean living hypercalcified sponge belonging to Calcarea, Petrobiona massiliana (Vacelet and Lévi, 1958), was conducted. Oriented observations in light and electron microscopy of mature and growing areas of the Mg-calcite basal skeleton were combined in order to describe all structural levels from the submicronic to the macroscopic scale. The smallest units produced are ca. 50-100 nm grains that are in a mushy amorphous state before their crystallization. Selected area electron diffraction (SAED) further demonstrated that submicronic grains are assembled into crystallographically coherent clusters or fibers, the latter are even laterally associated into single-crystal bundles. A model of crystallization propagation through amorphous submicronic granular units is proposed to explain the formation of coherent micron-scale structural units. Finally, XRD and EELS analyses highlighted, respectively, inter-individual variation of skeletal Mg contents and heterogeneous spatial distribution of Ca ions in skeletal fibers. All mineralogical features presented here cannot be explained by classical inorganic crystallization principles in super-saturated solutions, but rather underlined a highly biologically regulated formation of the basal skeleton. This study extending recent observations on corals, mollusk and echinoderms confirms that occurrence of submicronic granular units and a possible transient amorphous precursor phase in calcium carbonate skeletons is a common biomineralization strategy already selected by basal metazoans. © 2011 Elsevier Inc.IF: 3,497SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Lissodendoryx (Ectyodoryx) corrugata Fernandez, Cárdenas, Bravo, Lôbo-Hajdu, Willenz & Hajdu, 2016, sp. nov.

&lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;Ectyodoryx&lt;/i&gt;) &lt;i&gt;corrugata&lt;/i&gt; sp. nov. &lt;p&gt;(Tabs 2&ndash;3; Figs 4&ndash;7)&lt;/p&gt; &lt;p&gt; &lt;b&gt;Holotype.&lt;/b&gt; IZUA&ndash;POR 167, Isla Leucayec, Guaitecas Archipelago (44&ordm;03&rsquo;59.00&rdquo;S / 73&ordm;41&rsquo;00.38&rdquo;W, Chile), 10&ndash;18 m depth, coll. E. Hajdu &amp; R. Foley, 0 7 March 2005. Fragments from holotype deposited under MNRJ 8963 and RBINSc&ndash;IG 32232&ndash;POR 8963. &lt;b&gt;Paratype.&lt;/b&gt; MNRJ 17398, Punta Llonco, Comau Fjord, Chile (42&ordm;20&rsquo;38.22&rdquo;S / 72&ordm;27&rsquo;25.26&rdquo;W), &lt;30 m depth, coll. G. F&ouml;rsterra, 0 3 January 2006.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Diagnosis.&lt;/b&gt; Massive, ovoid &lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;Ectyodoryx&lt;/i&gt;) with numerous sinuous short anastomosing projections over the entire surface resembling a cauliflower; apically microspined tylotes (108&ndash;204/4.8&ndash;6), acanthostyles (I. 252&ndash;358/8&ndash;16.8, II. 90 &ndash;158/7.5&ndash;12.5), and arcuate isochelae (I 28&ndash;40, II 16&ndash;24).&lt;/p&gt; &lt;p&gt; &lt;b&gt;Description.&lt;/b&gt; Massive oval shaped sponge (Figs 4 A&ndash;B; Figs 5 A&ndash;D), with numerous sinuous, short, anastomosing projections over the entire surface; resembling a cauliflower. The holotype is 4 cm long and 3 cm in high (in life) and the paratype is 3.8 cm and 3 cm, respectively. The paratype is relatively more compact. Simple oscula (diameter up to 0.3 cm, &lt;i&gt;in vivo&lt;/i&gt; holotype), scattered and scarce. Colour &lt;i&gt;in vivo&lt;/i&gt; beige, and in ethanol specimens are light beige. Their consistency is compressible, rather delicate, and the paratype is somewhat harder; texture slightly rough.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Skeleton.&lt;/b&gt; The choanosomal skeleton is (sub)anisotropic (Fig. 6 A) or subisodictyal reticulation (Fig. 6 D). Larger acanthostyles form pauci- to multispicular ascending tracts (up to seven spicules across), reaching the sponge surface and piercing it by up to 300 &micro;m. These acanthostyles also constitute secondary orthogonal tracts, one spicule long, and up to four in thickness (Figs 6 B, E). Smaller acanthostyles echinate the main choanosomal tracts, and the nodes of the reticulation. Tylotes are spread in the surface, often perpendicularly or obliquely (Fig. 6 C). Tracts are partially inserted in a spongin layer of fibrous appearance (Fig. 6 F). Two categories of arcuate isochelae are scattered all around in choanosome and ectosome, the smaller of which is more frequent. Subectosomal lacunae absent, but wide choanosomal cavities occur, roundish or variably ellipsoid, up to 2 mm in maximum diameter.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Spicules.&lt;/b&gt; Megascleres (Tabs 2&ndash;3): (Sub)tylotes (Figs 7 A&ndash;B, I&ndash;J), straight, rather minutely microspined on both ends, which can be slightly aniso-tylote, elongated tyles only slightly swollen (elliptical), 108&ndash; &lt;i&gt;172&lt;/i&gt; (25.3) &ndash; 204/4.8&ndash; &lt;i&gt;5.1&lt;/i&gt; (0.3) &ndash;6. Acanthostyles I (Figs 7 C&ndash;D, K&ndash;L), straight or slightly curved, stout, somewhat fusiform, base slightly constricted, regularly round, apex sharpening gradually; spines not so abundant, straight, up to 1.5 &micro;m high, concentrated at and near the base, a few spicules (variably thick) are very lightly spined or smooth, 252&ndash; &lt;i&gt;313.5&lt;/i&gt; (29.7) &ndash;358/8&ndash; &lt;i&gt;13.5&lt;/i&gt; (2.6) &ndash;16.8. Acanthostyles II (Figs 7 E&ndash;F, M&ndash;N), mostly straight, with a swollen base up to 3 &micro;m thicker than the shaft, gradually sharpening point; abundant spines, up to 5 &micro;m high, straight, spread over shaft and base, 90&ndash; &lt;i&gt;126&lt;/i&gt; (24.3) &ndash;158/7.5&ndash; &lt;i&gt;10.3&lt;/i&gt; (1.6) &ndash;12.5. Microscleres (Tabs 2&ndash;3): Arcuate isochelae I (Figs 7 G, O), smooth, relatively thick shaft, alae slightly elongated, but relatively small, young forms with markedly reduced alae: 31&ndash; &lt;i&gt;34&lt;/i&gt; (3.3) &ndash;40. Arcuate isochelae II (Figs 7 H, P), same as isochelae I, but smaller, 16&ndash; &lt;i&gt;22&lt;/i&gt; (2) &ndash;29. The Sturges algorithm confirmed the occurrence of two size classes of isochelae.&lt;/p&gt; &lt;p&gt;Specimen ectosomal tylotes (with microspined choanosomal acanthostyles: arcuate isochelae&lt;/p&gt; &lt;p&gt;ends) I. main, II. echinating&lt;/p&gt; &lt;p&gt; IZUA&ndash;POR 167 108&ndash; &lt;i&gt;162&lt;/i&gt; &ndash;204/ I. 252&ndash; &lt;i&gt;300&lt;/i&gt; &ndash;353/8&ndash; &lt;i&gt;14.7&lt;/i&gt; &ndash;16.8 I. 31.5&ndash; &lt;i&gt;35.6&lt;/i&gt; &ndash;40&lt;/p&gt; &lt;p&gt; holotype 4.8&ndash; &lt;i&gt;5.2&lt;/i&gt; &ndash; 6 II. 90 &ndash; &lt;i&gt;128.2&lt;/i&gt; &ndash;158/9&ndash; &lt;i&gt;11.2&lt;/i&gt; &ndash;12.5 II. 16&ndash; &lt;i&gt;21&lt;/i&gt; &ndash;24&lt;/p&gt; &lt;p&gt; MNRJ 17398 158&ndash; &lt;i&gt;182&lt;/i&gt; &ndash;200/ I. 290&ndash; &lt;i&gt;326.6&lt;/i&gt; &ndash;358/8.5&ndash; &lt;i&gt;12.3&lt;/i&gt; &ndash;14.5 I. 28&ndash; &lt;i&gt;34&lt;/i&gt; &ndash;40&lt;/p&gt; &lt;p&gt; paratype 4.8&ndash; &lt;i&gt;5&lt;/i&gt; &ndash;5.2 II. 90 &ndash; &lt;i&gt;124&lt;/i&gt; &ndash;145/7.5&ndash; &lt;i&gt;9.4&lt;/i&gt; &ndash; 10 II. 21 &ndash; &lt;i&gt;22.8&lt;/i&gt; &ndash;24 &lt;b&gt;Ecology.&lt;/b&gt; The holotype was attached to a bunch of slender chitinous polychaete tubes (Family Spionidae), and the paratype was attached to a coral.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Distribution.&lt;/b&gt; So far endemic from the northern sector of Chile&rsquo;s fjord region, from its type locality at the Guaitecas Archipelago (44&ordm;S) to Comau Fjord (42&ordm;S).&lt;/p&gt; &lt;p&gt; &lt;b&gt;Etymology.&lt;/b&gt; The species is named &lsquo;corrugata&rsquo; (Latin &lt;i&gt;corrugatus&lt;/i&gt; = rugose) on account of its irregular, cauliflower-like surface.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Remarks.&lt;/b&gt; &lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;Ectyodoryx) corrugata&lt;/i&gt; &lt;b&gt;sp. nov.&lt;/b&gt; is distinguished from &lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) spp. occurring in the SE Pacific, and in additional allied biogeographic provinces, as well as from &lt;i&gt;L.&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) &lt;i&gt;ballena&lt;/i&gt; &lt;b&gt;sp. nov.&lt;/b&gt; (described above) by its possession of two categories of arcuate isochelae combined with terminally microspined tylotes. The presence of little spines in the extremities of tylotes is shared with five species of &lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;Ectyodoryx&lt;/i&gt;) considered here (Tab. 2); &lt;i&gt;viz. L.&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) &lt;i&gt;anacantha&lt;/i&gt;, &lt;i&gt;L.&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) &lt;i&gt;nobilis&lt;/i&gt;, &lt;i&gt;L.&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) &lt;i&gt;patagonica&lt;/i&gt;, &lt;i&gt;L.&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) &lt;i&gt;plumosa&lt;/i&gt;, and &lt;i&gt;L.&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) &lt;i&gt;ramilobosa&lt;/i&gt;. This character may also be present in the genus&rsquo; type species, &lt;i&gt;L.&lt;/i&gt;&lt;/p&gt; &lt;p&gt; (&lt;i&gt;Lissodendoryx&lt;/i&gt;) &lt;i&gt;isodictyalis&lt;/i&gt; (Carter, 1882). A phylogenetic assessment of synapomorphies is needed to verify whether the current subgeneric arrangement, and its emphasis on presence vs. absence of echinating acanthostyles (van Soest, 2002a), is more parsimonious than an alternative system with greater weighting given to the micromorphology of spicules.&lt;/p&gt;Published as part of &lt;i&gt;Fernandez, Julio C. C., Cárdenas, César A., Bravo, Alejandro, Lôbo-Hajdu, Gisele, Willenz, Philippe &amp; Hajdu, Eduardo, 2016, Lissodendoryx (Ectyodoryx) Lundbeck, 1909 (Coelosphaeridae, Poecilosclerida, Demospongiae) from Southern Chile: new species and a discussion of morphologic characters in the subgenus in Zootaxa 4092 (1)&lt;/i&gt; on pages 76-79, DOI: 10.11646/zootaxa.4092.1.4, &lt;a href="http://zenodo.org/record/266115"&gt;http://zenodo.org/record/266115&lt;/a&gt

Identification of the bacterial symbiont Entotheonella sp. in the mesohyl of the marine sponge Discodermia sp.

The AC-OPF problem is the key and challenging problem in the power system operation. When solving the AC-OPF problem, the feasibility issue is critical. In this paper, we develop an efficient Deep Neural Network (DNN) approach, DeepOPF, to ensure the feasibility of the generated solution. The idea is to train a DNN model to predict a set of independent operating variables, and then to directly compute the remaining dependable variables by solving the AC power flow equations. While this guarantees the power-flow balances, the principal difficulty lies in ensuring that the obtained solutions satisfy the operation limits of generations, voltages, and branch flow. We tackle this hurdle by employing a penalty approach in training the DNN. As the penalty gradients make the common first-order gradient-based algorithms prohibited due to the hardness of obtaining an explicit-form expression of the penalty gradients, we further apply a zero-order optimization technique to design the training algorithm to address the critical issue. The simulation results of the IEEE test case demonstrate the effectiveness of the penalty approach. Also, they show that DeepOPF can speed up the computing time by one order of magnitude compared to a state-of-the-art solver, at the expense of minor optimality loss

Lissodendoryx (Ectyodoryx) coloanensis Fernandez, Cárdenas, Bravo, Lôbo-Hajdu, Willenz & Hajdu, 2016, sp. nov.

&lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;Ectyodoryx&lt;/i&gt;) &lt;i&gt;coloanensis&lt;/i&gt; sp. nov. &lt;p&gt;(Tab. 2; Figs 8&ndash;9)&lt;/p&gt; &lt;p&gt; &lt;b&gt;Holotype.&lt;/b&gt; IZUA&ndash;POR 168, Bahia Nash, Isla Santa In&eacute;s, Francisco Coloane Marine Protected Area, Magellan Strait, Chile (53&deg;41&rsquo;S / 72&deg;20&rsquo;W), 20 m depth, coll. C.A. C&aacute;rdenas, May 2007. Fragment from holotype deposited under MNRJ 17608.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Diagnosis.&lt;/b&gt; Globular &lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;Ectyodoryx&lt;/i&gt;) composed of a dense mass of juxtaposed slender hollow tubes (ca. 0.5 mm in diameter each), which may anastomose; terminally microspined tylotes (150&ndash;198/4&ndash;5), acanthostyles (I. 190&ndash;300/7.2&ndash;9, II. 84 &ndash;115/6&ndash;8), and arcuate isochelae (I. 26 &ndash;31.2, II. 19&ndash;22).&lt;/p&gt; &lt;p&gt; &lt;b&gt;Description.&lt;/b&gt; Globular (Figs 8 A&ndash;B), 4 cm in diameter x 3 cm high; hispid surface (Fig. 8 C); body made up of a dense mass of juxtaposed small slender hollow tubes (ca. 0.5 mm in diameter each &lsquo;fiber&rsquo;), which may anastomose (Fig. 8 B); larger, simple openings (possibly oscula, up to 0.3 cm in diameter) are spread at the surface; colour in life beige, and in ethanol, lighter or darker beige; consistency rather compressible and delicate; rough texture.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Skeleton.&lt;/b&gt; Sub-anisotropic reticulation (Fig. 9 A) of larger acanthostyles forming ascending pauci- to multispicular tracts (up to seven spicules across) in the choanosome, reaching the surface and piercing it by up to 200 &micro;m. These acanthostyles also constitute secondary orthogonal tracts, one spicule long, and up to three in thickness (Fig. 9 B). Spongin in fibres is not apparent. These ascending spicule tracts can inter-cross or anastomose in the inner parts of the sponge, but are free from each other near the surface. Smaller acanthostyles echinate the main choanosomal tracts and the nodes of the reticulation. Tylotes are strewn at the surface, also tangentially (Fig. 9 C). Two kinds of arcuate isochelae occur throughout the choanosome and ectosome, the smaller category being the most abundant. Large choanosomal cavities are present, round or more elongated in section, up to 2000 &micro;m long.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Spicules.&lt;/b&gt; Megascleres (Tab. 2): Tylotes (Figs 9 D&ndash;E), straight, microspined at both ends, sometimes slightly aniso-tylote; tyles only slightly swollen and elongated, 150&ndash; &lt;i&gt;187.&lt;/i&gt; 2 (14) &ndash;198/4&ndash; &lt;i&gt;4.7&lt;/i&gt; (0.5)&ndash;5. Acanthostyles I (Figs 9 F&ndash;G), straight to slightly curved, stout and somewhat fusiform; base slightly constricted, frequently bearing a subtle neck and discreet tyle, sometimes only irregularly round; apex sharpening gradually; spines (not abundant), up to 1.2 &micro;m high, straight, concentrated on the basal portion of the spicule, a few spicules (variably thick) bear much less if any spines at all, 190&ndash; &lt;i&gt;267.5&lt;/i&gt; (34.3) &ndash;300/7.2&ndash; &lt;i&gt;8&lt;/i&gt; (0.6) &ndash;9. Acanthostyles II (Figs 9 H&ndash;I), frequently straight, base swollen (up to 3 &micro;m thicker than the shaft); gradually sharpening apex; abundant spines up to 3 &micro;m high, straight, spread all over the spicule, 84&ndash; &lt;i&gt;100&lt;/i&gt; (10) &ndash;115/6&ndash; &lt;i&gt;7.&lt;/i&gt; 5 (0.6) &ndash;8. Microscleres (Tab. 2): Arcuate isochelae I (Fig. 9 J), shaft curved, smooth, relatively thick; alae small but slightly elongated, young forms slender with markedly reduced alae, 25&ndash; &lt;i&gt;29.&lt;/i&gt; 3 (2) &ndash;31. Arcuate isochelae II (Fig. 9 K), same as the preceding one, but smaller, 19&ndash; &lt;i&gt;19.7&lt;/i&gt; (0.9) &ndash;22. The Sturges algorithm confirmed the occurrence of two size classes of isochelae.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Ecology.&lt;/b&gt; The sponge was growing on rocky substrate, over tubes of the polychaete &lt;i&gt;Chaetopterus variopedatus&lt;/i&gt;, and next to &lt;i&gt;Tedania&lt;/i&gt; sp. (Tedaniidae) and another unidentified haplosclerid sponge.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Distribution.&lt;/b&gt; Provisionally endemic from its type locality at Isla Santa In&eacute;s (Magellan Strait, Chile).&lt;/p&gt; &lt;p&gt; &lt;b&gt;Etymology.&lt;/b&gt; The specific epithet is derived from the new species&rsquo; occurrence in Chile&rsquo;s Francisco Coloane Marine Protected Area.&lt;/p&gt; &lt;p&gt; &lt;b&gt;Remarks.&lt;/b&gt; &lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;Ectyodoryx&lt;/i&gt;) &lt;i&gt;coloanensis&lt;/i&gt; &lt;b&gt;sp. nov.&lt;/b&gt; is distinguished from &lt;i&gt;Lissodendoryx&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) spp. occurring in the SE Pacific, additional allied biogeographic provinces, as well as &lt;i&gt;L.&lt;/i&gt; (&lt;i&gt;E&lt;/i&gt;.) &lt;i&gt;ballena&lt;/i&gt; &lt;b&gt;sp. nov.&lt;/b&gt;, due to its two categories of arcuate isochelae combined with terminally microspined tylotes (Tab. 2). The spicule set of &lt;i&gt;L.&lt;/i&gt; (&lt;i&gt;E.&lt;/i&gt;) &lt;i&gt;coloanensis&lt;/i&gt; &lt;b&gt;sp. nov.&lt;/b&gt; is rather similar to that of &lt;i&gt;L.&lt;/i&gt; (&lt;i&gt;E&lt;/i&gt;.) &lt;i&gt;corrugata&lt;/i&gt; &lt;b&gt;sp. nov&lt;/b&gt;. (Fig. 9 and Fig. 7, respectively). Nevertheless, the former can be distinguished by its shorter and more slender acanthostyles (Tab. 2), besides a relatively distinct outer morphology and consistency (Fig. 8 e Figs 4&ndash;5, respectively).&lt;/p&gt;Published as part of &lt;i&gt;Fernandez, Julio C. C., Cárdenas, César A., Bravo, Alejandro, Lôbo-Hajdu, Gisele, Willenz, Philippe &amp; Hajdu, Eduardo, 2016, Lissodendoryx (Ectyodoryx) Lundbeck, 1909 (Coelosphaeridae, Poecilosclerida, Demospongiae) from Southern Chile: new species and a discussion of morphologic characters in the subgenus in Zootaxa 4092 (1)&lt;/i&gt; on pages 79-82, DOI: 10.11646/zootaxa.4092.1.4, &lt;a href="http://zenodo.org/record/266115"&gt;http://zenodo.org/record/266115&lt;/a&gt