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Collado Ubago, a 2700 m.
No full textBoExcursió del 25 i 26 d'agost de 1973. Itinerari: Benasc - Campament obrer a l'entrada de la vall - Ermita de Santa Ana - Refugi d'Estós (1835 m.) - Casa Cuartel - Estany de Perdiguero (2380 m.) - Collado Ubago (2700 m.) - Cota 2770 - Llac Literola (2740 m.) - Collado Ubago - Casa Cuartel - Benas
Heleobia deserticola Collado, 2015, sp. nov.
No full textSpecies Heleobia deserticola sp. nov. Holotype. (MZUC 43067, Fig. 1 A). Collected by G.A. Collado from Aguada de Chorrillos, Chile (28 November 2011). Holotype measurements: SL 4.41 mm, SW 2.10 mm, AL 2.00 mm, AW 1.21 mm. Paratypes. (MZUC 43068–43077, Fig. 1 B – K). Snails from Aguada de Chorrillos, Chile, collected with the holotype by G.A. Collado. Morphometric data of the paratypes (n = 10): SL: 4.01 ± 0.31 (3.40 – 4.40); SW: 1.99 ± 0.13 (1.80 – 2.20); AL: 1.76 ± 0.19 (1.40 – 2.00); AW: 1.22 ± 0.15 (1.00 – 1.40); SW/SL: 0.50 ± 0.02 (0.46 – 0.53); AL/SL: 0.44 ± 0.04 (0.35 – 0.47); AW/AL: 0.07 ± 0.08 (0.61 – 0.86). Description. Shell small, elongate – conic, thin, transparent, smooth, suture depth, closed umbilicus (imperforate). Adults with 6 to 7 convex whorls. Aperture ovate, outer lip thin. Operculum corneous, ovate, flat, thin, light brown, paucispiral (Fig. 1 L). Foot, mantle and tentacles gray, head black, snout white, visceral sac yellow to light brown. Penis elongated, white – grayish; proximal portion with a wide base, with 5 – 6 cup – shaped apocrine glands on the border (Fig. 1 M – O); distal portion tapers to an elongated conical tip. One or two additional aprocrine glands are located in the convex side of the penis. Reproductive biology. This species is gonochoric, with direct development. Several individuals sampled in Aguada de Chorrillos bore single egg capsules attached to the shells with an embryo or a juvenile snail inside, depending on the stage of development (Fig. 1 P, Q). Type locality. Aguada de Chorrillos, a small spring located at the Pacific coast in the Atacama Desert, northern Chile (Fig. 2 A, B), 5 m above sea level. The site is located several kilometers north of the mouth of the Copiapó River, which is separated from it by an arid desert. The water of the spring arises from the walls of a canyon about 10 m high that form pools (Fig. 2 B) at the bottom of the ravine which eventually drains to the sea. Distribution and habitat. The snails were collected from the small puddles of water (c. 10 cm depth) on soft substrate in the spring Aguada de Chorrillos. In November 2011 individuals of all size ranges from this locality were sampled. Etymology. The name is a compound noun meaning desert dweller; it is derived from the area of origin of the new species. Remarks. Heleobia deserticola sp. nov. can be distinguished from the other species of the genus by its particular penis morphology (Fig. 1 M – O), including the wide portion of the base of the organ, several apocrine glands located around of the complete margin of the base and the additional aprocrine glands located in the convex side of the central portion of the organ. All these characters as a whole differentiate this species from other species of the group whose penis morphology is known (e.g. Hubendick 1955; Gaillard & de Castellanos 1976; Hershler & Thompson 1992; Collado et al. 2011; Ovando & De Francesco 2011; Collado 2012; Collado et al. 2013). The sister group of this species is an undescribed population from Carrera Pinto, northern Chile (Collado et al. 2013), a spring separated from Aguada de Chorrillos by over 100 km of arid desert. I did not treat these populations as conspecific because of differences in shell and penis morphology (Fig. 1 R, S). The shell of the snails from Carrera Pinto has a band in the growing whorls not present in Heleobia deserticola sp. nov. while the penis has aprocrine glands only on the convex side of the base. The snails from Aguada de Chorrillos and Carrera Pinto belong to the clade including Heleobia transitoria (Biese, 1947), and a population from Quebrada El León in the Atacama Desert. These snails are not very close to Heleobia opachensis (Biese, 1947), Heleobia loaensis (Biese, 1947), Heleobia chimbaensis (Biese, 1944), Heleobia ascotanensis (Courty, 1907) and Heleobia atacamensis (Philippi, 1860) (Collado et al. 2013) described from northern Chile. Comparison with the other Heleobia species. Heleobia deserticola sp. nov. fits well the morphological characteristics of the shell and penis of the genus as defined by Hershler & Thompson (1992), with the male copulatory organ possessing aprocrine glands. Additionally, the new species was also placed in the genus Heleobia based on a molecular phylogenetic analysis (Collado et al. 2013). Of the nominal species of Heleobia from northern Chile, Heleobia deserticola sp. nov. is the third representative described from the coast of the Atacama Desert after H. chimbaensis and H. transitoria. The shell of the new species is little differentiated morphologically from other regional congeners [see Collado et al. (2011), Collado (2012), Collado et al. (2013) for comparative purposes]. The closed umbilicus of the new species resembles that of H. atacamensis, H. loaensis, H. opachensis and H. transitoria. Heleobia deserticola sp. nov. has direct development, similar to the reproductive strategy employed by H. chimbaensis, Heleobia parchappii (d’Orbigny, 1835), Heleobia miaulis (Marcus & Marcus, 1965) and Heleobia guaranitica (Doering, 1885) (Marcus & Marcus 1965; Gaillard 1973; Cazzaniga 1982; Collado & Méndez 2011); other species of Heleobia have indirect development (see Collado & Méndez 2011). The black pigmentation of the head of H. deserticola sp. nov. differs from that of Heleobia neveui (Bavay, 1904) because the latter species in general is less pigmented (Hubendick 1955). The gray pigmentation of the tentacles of H. deserticola sp. nov. differs from that of Heleobia compacta (Haas, 1955), Heleobia cumingii (d’Orbigny, 1835) and Heleobia aperta (Haas, 1955) from Lake Titicaca, which are almost black over all these structures (Hubendick 1955). Heleobia is divided into two groups on the basis of the size (Biese 1944, 1947). The group of Heleobia hatcheri (Pilsbry, 1911), which contains small species, with 4–5 shell whorls, and the group of H. parchappii, which contains larger forms, with 5–8 whorls. The new species belongs to the second group; adult individuals can reach up to seven whorls. Heleobia deserticola sp. nov. is only known from the spring of Aguada de Chorrillos (Collado et al. 2013; present study). This oasis is an extremely small restricted habitat, surrounded by an arid desert and facing the sea. In northern Chile, several localities with populations of Heleobia are subjected to anthropogenic pressures, pollution or water scarcity (Collado 2012). Recently, two species of Heleobia in the Atacama Desert, H. atacamensis and H. chimbaensis were declared Critically Endangered and Vulnerable, respectively (Collado 2013 a, b), according to the list of the threatened species of the Ministerio del Medio Ambiente, República de Chile. It is clear that some biological and population parameters need to be estimated by monitoring Heleobia deserticola sp. nov. because any alteration to the biotope could affect the population of these snails in Aguada de Chorrillos. There are currently no conservation measures for this particular place.Published as part of Collado, Gonzalo A., 2015, A new freshwater snail (Caenogastropoda: Cochliopidae) from the Atacama Desert, northern Chile, pp. 445-449 in Zootaxa 3925 (3) on pages 445-446, DOI: 10.11646/zootaxa.3925.3.9, http://zenodo.org/record/24227
Pristina terrena Collado & Schmelz 2000
No full textPristina terrena Collado & Schmelz, 2000 Pristina terrena Collado & Schmelz, 2000: 513 –514, figs 8, 9. Material examined. Five specimens, sexually immature, IG 327183 - 23 to IG 327183 - 27; one specimen with budding zone and primordial testes in VIII and primordial ovaries in IX. Cusuco National Park, Honduras, [15.505813 -88.21473, 15.506299 -88.23704, 15.522537 -88.27598, 15.513245 -88.28807, 15.526152 -88.27662], respectively 2061 m, 1457 m, 1558 m, 1468 m and 1587 m asl, M. Jocque 07/07/ 2013 to 06/08/ 2013. Further 6 specimens in the 3 rd author's collection, [15.52425 -88.28853, 15.50731 -88.29428], respectively 1659 m, 1347 m asl, M. Jocque 07/08/ 2006. Description. Body length 1–2 mm, diameter 0.1–0.14 mm. Segment number of complete specimens 17–24 (17, 17, 19, 20, 24). Budding zone present in two specimens, between chaetae of XVII and XVIII (specimen with 24 segments) or XIV and XV (specimen with 20 segments). Posterior zooids with 6 or 7 segments. Dorsal bundles with 1 or 2 elongate, serrate hairs and 1 or 2 simple-pointed needles; more often just one hair and one needle per bundle. Hairs up to or more than three times as long as body diameter, increasing from II to VII to maximum length. From VII on, hair length 240–340 Μm, varying among bundles, segments and specimens. Hair length slightly reduced in hindmost 2 segments, not as much as in foremost segments. Hairs c. 2 Μm thick at base, tapering continuously ectad, less than 1 Μm thick at tip; serration distinct at x 250 magnification on convex side of bent chaeta, serration 'teeth'> 1 Μm apart, distance between teeth wider at base than towards the tip. Needles tightly attached to proximal hair shaft and not always well-distinguished, c. 40 Μm long, straight without nodulus, about 1.5 Μm thick in ental 4 / 5, strongly thinning out in ectal 1 / 5, bent backwards towards hair, ectal tip parallel to hair shaft. Tip simple-pointed at x 1000 magnification but somewhat widened. Chaetal follicle conspicuous, diameter c. 15 Μm. Ventral chaetae all alike, 37–40 Μm long, bifid, nodulus as a faint swelling at c. 2 / 5 from distal tip, teeth short, about 1.5 Μm long, upper tooth minutely shorter and thinner than lower; chaetae straight distally, only teeth bent here; proximal third of chaetae bent in opposite direction of teeth; in II 6–9 chaetae per bundle, varying among specimens, 5–7 in II–XI, in posterior body half 3–5 per bundle, decreasing posteriad from 5 to 4 or from 4 to 3. Prostomium without proboscis, rounded, longer than wide in one specimen, wider than long in all others (c. 50–70 Μm long and 70–80 Μm wide). Prostomial epithelium with several bilateral-symmetrical protuberances projecting entad into prostomial lumen, protuberances larger ventrally near mouth opening than dorsally, absent mid-ventrally. Epidermal gland cells seen in some specimens, laterally of and level to dorsal chaetal bundles. Pharyngeal pad with tenuous protractor and retractor muscles. Pharyngeal glands in separate packages at 3 /4, 4/ 5, and 5 / 6, enclosing septa. Gut diameter abruptly widened behind septum 6 / 7, from c. 80 to 180 Μm, not constricted in following segment (i.e. no stomach distinguishable), no cells with intracellular 'stomachal' canals distinguished. Dorsal blood vessel large in VI (and V), not seen posteriorly. Three simple and unbranched commissural vessels observed near 2 /3, 3/4, 4/ 5. Pars tumida of midgut present. First nephridium in VII, unpaired. Most of following nephridia unpaired as well, on alternating sides, 10 nephridia counted altogether in a specimen with 20 segments. Nephrostome present, on anterior face of 6 / 7 ventro-laterally; wide and densely packed loops in all of VII, dorsally and ventrally. Nephropores ventral, anterior to ventral chaetal bundles. Coelomocytes spherical, diameter 6–10 Μm, with glassy irregular texture, vesicles not distinguished. Remarks. Our specimens agree in all diagnostic details with Pristina terrena Collado & Schmelz, 2000. Noteworthy are the long serrate hairs that increase in length from II to VII and vary in length from VIII on, seemingly simple-pointed needles without nodulus and a tapering distal fifth bent towards the hair, and ventral chaetae that differ very little in size and shape between anterior and posterior bundles, with short and more or less equal-sized teeth. Further similiarities of P. terrena extend to body size, segment number, blood vessels, blood commissurals, and location of the first nephridium. The only difference of possible taxonomic importance is the widening of the intestine, described as gradual in P. t errena and abrupt in our specimens. However, the latter is a fixation artefact due to strong contraction of the animals when fixed in ethanol. We reinvestigated non-type ethanol-preserved reference specimens of the original series from Collado's personal collection (see Collado & Schmelz 2000), and there the intestine shows an abrupt widening as well. A stomach was not seen in the Honduras material and is absent in P. t e r ren a as originally described. The coelomocyte granulation, conspicuous in living specimens, is no longer seen in ethanol-preserved material, but the non-type reference material (see above) has the same irregular glassy texture without distinct vesicle; such a pattern can be indicative of coarse refractile granules as seen in live P. t errena. The same correspondence has been observed in enchytraeids (comp. Rota 2013). This is the first record of P. t er re n a after the original description from rain forest soils near Manaus, Brazil. The distance of approx. 3500 km between the two localities may suggest an extremely good dispersal ability of the species, but P. t e r re n a may also be common and widespread in Central and South America. Records of Pristina in Central and South America are scarce and mostly restricted to limnic, river and groundwater habitats, where this soil-dwelling species may not occur. Pristina species were regularly found in a non-flooded ("terra firme") primary forest plot of Amazonia, with six species described or recorded so far (Collado & Schmelz 2000, 2001, 2002; Augustsson 2001) and also in the Mata Atlântica of the Brazilian State Paraná (Römbke et al. 2005).Published as part of Schmelz, Rüdiger M., Jocque, Merlijn & Collado, Rut, 2015, Microdrile Oligochaeta in bromeliad pools of a Honduran cloud forest, pp. 508-526 in Zootaxa 3947 (4) on pages 518-519, DOI: 10.11646/zootaxa.3947.4.3, http://zenodo.org/record/24261
Collado Ubago (2700 m.), al final d'una ferma pujada…
No full textBoExcursió del 25 i 26 d'agost de 1973. Itinerari: Benasc - Campament obrer a l'entrada de la vall - Ermita de Santa Ana - Refugi d'Estós (1835 m.) - Casa Cuartel - Estany de Perdiguero (2380 m.) - Collado Ubago (2700 m.) - Cota 2770 - Llac Literola (2740 m.) - Collado Ubago - Casa Cuartel - Benas
El Perdigueret (2839 m.) des del collado Ubago
No full textBoExcursió del 25 i 26 d'agost de 1973. Itinerari: Benasc - Campament obrer a l'entrada de la vall - Ermita de Santa Ana - Refugi d'Estós (1835 m.) - Casa Cuartel - Estany de Perdiguero (2380 m.) - Collado Ubago (2700 m.) - Cota 2770 - Llac Literola (2740 m.) - Collado Ubago - Casa Cuartel - Benas
Collado Ubago (2.700 m.)
No full textBoExcursió de l'1 al 10 d'agost de 1976. Itinerari: Barbastre - Bielsa (1023 m.) - Vall de Pineta - Llac de Ordiceto (i barracons) (2370 m.) - Punta Suelza (2973 m.) - Paso de los Caballos - Refugi de Viadós (1760 m.) - Barranc de la Ribereta - Llacs de Millar (2390 i 2515 m.) - Cota 2755 sobre l'ivó de Sein - Pic del Senyal de Viadós (2600 m.) - Gran Batximala (3117 m.) - Vall del Cinqueta de la Pez - Refugi de Viadós (1760 m.) - Cabana de l'Anyescruces - Port de Gistau (2572 m.) - Refugi d'Estós (1835 m.) / Refugi d'Estós (1835 m.) - Estany de Perdiguero (2380 m.) - Collado Ubago (2700 m.) - Cim del Perdiguero (3220 m.) - Refugi d'Estós (1835 m.) - Llac superior de Gies (2649 m.) - Port de Gies (2921 m.) Pic Nord o Superior de Clarabide (3028 m.) - Pic Sud o Inferior de Clarabide (3021 m.) - Pic de Gies (3011 m.) - Refugi d'Estós (1835 m.) - Vall d'Estós - Benasc (1138 m.) - Grau
Cap a Collado Ubago
No full textBoExcursió del 25 i 26 d'agost de 1973. Itinerari: Benasc - Campament obrer a l'entrada de la vall - Ermita de Santa Ana - Refugi d'Estós (1835 m.) - Casa Cuartel - Estany de Perdiguero (2380 m.) - Collado Ubago (2700 m.) - Cota 2770 - Llac Literola (2740 m.) - Collado Ubago - Casa Cuartel - Benas
Pristina trifida Collado & Schmelz, 2002, sp. nov.
No full textPristina trifida sp. nov. (Figures 1, 2, Tables 1, 2) Holotype. INPA Cat. No. 119, sexually mature specimen. Type locality: Primary rain forest plot of the SHIFT project ENV 52 study area, 02° 53 ’ 47 ” S, 59 ° 59 ’ 45 ” W; at km 29 on the road ManausItacoatiara close to the agroforestry research station EMBRAPACPAA in the state of Amazonas, Brazil. Soil samples collected in March 1999 by Jörg Römbke, worms extracted from soil in April 1999 in the laboratory of Systematic Zoology, University of Osnabrück. Paratypes. INPA Cat. No. 120 ac, 3 sexually mature specimens. Material examined. Types (living and preserved). Further material: 4 specimens, sexually mature, fixed and embedded for future TEM microscopy; 4 nonsexual specimens, prepared for SEMmicroscopy; 2 nonsexual specimens, embedded in glycerine; 5 sexual and nonsexual specimens, squashed for examination of chaetae. All specimens examined alive before fixation or preparation. All specimens from type locality. Two SEMprepared specimens from soil sample collected in June 1997, all other specimens from soil sample containing the type specimens. Derivatio nominis. Trifidus (Lat.) = threesplit, named after the shape of the needle chaetae tip.Published as part of Collado, Rut & Schmelz, Rüdiger M., 2002, Pristina trifida sp. nov., a new soildwelling microannelid (Oligochaeta: Naididae) from Amazonian forest soils, with comments on species recognition in the genus, pp. 1-14 in Zootaxa 118 on pages 2-3, DOI: 10.5281/zenodo.15597
Redescription, molecular features, and neotype deposition of Rhipicephalus pusillus Gil Collado and Ixodes ventalloi Gil Collado (Acari, Ixodidae)
No full textEstrada-Peña, Agustin, Venzal, José M., Nava, Santiago (2018): Redescription, molecular features, and neotype deposition of Rhipicephalus pusillus Gil Collado and Ixodes ventalloi Gil Collado (Acari, Ixodidae). Zootaxa 4442 (2): 262-276, DOI: 10.11646/zootaxa.4442.2.
Vall de Perdiguero. Baixant de Collado Ubago
No full textBoExcursió del 25 i 26 d'agost de 1973. Itinerari: Benasc - Campament obrer a l'entrada de la vall - Ermita de Santa Ana - Refugi d'Estós (1835 m.) - Casa Cuartel - Estany de Perdiguero (2380 m.) - Collado Ubago (2700 m.) - Cota 2770 - Llac Literola (2740 m.) - Collado Ubago - Casa Cuartel - Benas
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