First record of Dactylobiotus parthenogeneticus Bertolani, 1982 (Eutardigrada: Murrayidae) in Mexico (original) (raw)
Related papers
Check List, 2020
Deep-water sampling in the Perdido Fold Belt, Gulf of Mexico, Mexican Economic Exclusive Zone yielded five specimens of tardigrades belonging to the genus Coronarctus Renaud-Mornant, 1974. The specimens represent the first records of the genus for Mexico. Two two-clawed larvae and two four-clawed larvae of Coronarctus mexicus Romano, Gallo, D'Addabbo, Accogli, Baguley & Montagna, 2011 and a single four-clawed larval specimen of an undescribed Coronarctus species were identified. Taxonomic analysis of the specimens contributed to the knowledge of deep-sea and Mexican marine tardigrades, two data-poor areas of study.
Remarks on some species of tardigrades from South America with the description of two new species
Journal of Natural History, 2002
Seven species of tardigrades are reported from Ecuador, one of which, Fractonotus caelatus (Marcus 1928) is new for South America and one, Minibiotus sidereus, is new for science. Minibiotus sidereus has circular, elliptical and star-shaped cuticular pearls (with 3-8 arms), pharyngeal bulb with large apophyses, three short macroplacoids and small microplacoid; the eggs have many conical processes with 6-7 annulations.
Tropical Zoology, 2001
Five species of tardigrades from South America are recorded, two of which, Pseudechiniscus spinerectus and Macrobiotus danielae, are new to science, and one, Doryphoribius flavus (Iharos 1966), is new for South America. Pseudechiniscus spinerectus differs from P. bidenticulatus Bartos ⁄ 1963 and P. bartkei Weglarska 1962 by having median plate 2 divided into two portions, spines of the pseudosegmental plate more developed; it differs from P. bidenticulatus by having inner claws with a spur; it differs from P. bartkei by having the caudal portion of the scapular plate faceted, more dense plate sculpture with dot size increasing from the head to the terminal plate, striae joining the dots to each other less evident. P. spinerectus differs from P. ramazzottii Maucci 1952 and from P. brevimontanus Kendall-Fite & Nelson 1996 in the following features: spines of the pseudosegmental plate more developed, dots of plate sculpture joined to each other by striae. It differs from P. ramazzottii also by having the papilla of the hind legs clearly shorter; it differs from P. brevimontanus also for some details of the ventral cuticular sculpture. Macrobiotus danielae belongs to the richtersi-group; it is very similar to Macrobiotus vanescens Pilato et al. 1991 from which it differs in the following features: smaller body size, wider buccal tube, slightly longer microplacoid, more slender claws, some characters of the eggs (reticular sculpture of the conical processes with less prominent ridges; less evident apical indentation; basal areolae smooth).
Two new tardigrade species (Echiniscidae and Doryphoribiidae) from the Salta province (Argentina)
Zootaxa, 2020
Tardigrades from Argentina are poorly known. Two new species from the Salta province are described in the present contribution: Pseudechiniscus saltensis sp. nov., and Doryphoribius cephalogibbosus sp. nov. The former species belongs to the novaezeelandiae group and, apart from the nominal species of the group, it is similar to nine congeneric species by the following characters: the absence of spines on legs I and lateral papillae, the scapular plate with a transversal fold, the presence of projections at the posterior margin of the pseudosegmental plate, caudal plate not faceted, and cuticular ornamentation in the form of heads (capituli) of endocuticular pillars, protruding through epicuticle and joined by striae. However, the new species differs from all of them in important qualitative (e.g. colour, different division of plates, details of cuticular ornamentation, claws etc.) and morphometric characters. The new species exhibits a unique morphology of gonopore and anus. Doryphoribius cephalogibbosus sp. nov., by the presence of two macroplacoids, dorsal gibbosities, and inhabiting terrestrial environment, belongs to the flavus group and differs from all members of the group in having ten, instead of nine, rows of gibbosities (X:2-4-6-6-6-6-6-4-2-2+2[LI-III]), with as a peculiar exclusive character, the presence of the two cephalic gibbosities, never reported in other Doryphoribius species. Moreover, the new species differs from the other species of the group by morphometric and more detailed morphological characters. The new species description also gave an occasion to discuss the issue of gibbosity arrangement in other species and address the morphology of claw accessory points.
A Strategy to Provide a Present and Future Scenario of Mexican Biodiversity of Tardigrada
Diversity
Although the number of known tardigrade taxa in Mexico has increased significantly in the last ten years, the knowledge of their diversity faces challenges, as more than half of the Mexican territory has no records of this phylum. Thus, we developed a strategy to provide a present and future scenario for understanding the Mexican biodiversity of Tardigrada, described the distribution patterns of the current recorded species, calculated the estimated richness, and the estimated taxonomic effort needed to complete the national inventory. We obtained 474 records of 105 taxa, belonging to 42 genera and 75 species, distributed in 12 of the 14 biogeographical provinces of Mexico. We found that 54.72% of the species are present in more than three world regions and 3.79% of species that have been recorded only in Mexican provinces. Distribution patterns could be recognized for 11 species, two of which have a Nearctic distribution, seven are Neotropical and two are distributed in both region...
Zootaxa, 2017
By examining material collected in the Sierra Nevada de Santa Marta (Department of Magdalena, Colombia), the authors report a new record for the entire South America, Doryphoribius gibber Beasley & Pilato, 1987, and two species new to science, Paramacrobiotus sagani sp. nov., and Doryphoribius rosane sp. nov., are described. Paramacrobiotus sagani sp. nov. belongs to the richtersi group, vanescens subgroup (by having sculptured egg areolae) and is characterized by a peculiar cuticular granulation, trunco-conical egg processes with cylindrical indented apices, and other more detailed cha-racters both qualitative and metric; by the unique combination of characters, it differs from all the other known species of the genus. Doryphoribius rosanae sp. nov. is characterized by reticulated dorsal cuticle with gibbosities (formula IX:4-6-2-6-2-6-4-2-2), two macroplacoids in the pharynx without microplacoid or septulum, and large, stout claws without "free" accessory points but with...
The water bears (Tardigrada) from Colombia are rather poorly known; thus, the aim of this research was to study the composition of tardigrade fauna inhabiting epiphytic and rock mosses in a high Andean forest in Guatavita. A 25-m2 plot was delimited and 6 randomly chosen trees with epiphytic mosses were sampled. Twelve samples of epiphytic mosses and 6 of rock mosses were collected and examined. A total of 277 specimens and 6 eggs of 8 tardigrade taxa were found in these samples. All taxa are new records for Guatavita and 5—Hypsibius dujardini (Doyère, 1840); Milnesium katarzynae Kaczmarek et al., 2004; Milnesium krzysztofi Kaczmarek & Michalczyk, 2007; Milnesium granulatum Ramazzotti 1962; and Paramacrobiotus danielae (Pilato et al., 2001)—are also new for Colombia.
Diversity
Limno-terrestrial tardigrades of Argentina had been studied starting in 1908 and for a long time by European researchers, most frequently in the Patagonian region (incl. the Land of Fire). Starting during the 1980s, Claps, Rossi and collaborators published many surveys, studying other regions also, but with taxonomic criteria at that time. Since the 2000s, methodical and continuous studies using more modern criteria, have been carried out at the National University of La Pampa, contributing to the faunistic, taxonomic and ecological knowledge (including new species descriptions). This paper provides a comprehensive list of the limno-terrestrial tardigrade fauna reported from Argentina, with pertinent evaluations, owing to a careful study of every pertinent piece of literature since 1908, also solving some problems of discordance between the main past checklists. Summarizing, 39 genera and 119 species are present; of these, 72 represent records accepted by the literature, while 47 ar...
First tardigrade records from San Pedro Mártir, Baja California, Mexico
2021
A total of 66 specimens representing four tardigrade taxa were found in 14 moss and lichen samples collected from the bark of Jeffrey’s Pine, Pinus jeffreyi Balf., in the Sierra de San Pedro Mártir (Baja California, north-western Mexico). Two taxa were identified to the species level (Echiniscus becki Schuster & Grigarick, 1966 and E. blumi Richters, 1903), and two to the genus level (Milnesium sp. and Ramazzottius sp.). These are the first tardigrade records from the state of Baja California, and they increase the known tardigrade diversity of Mexico to 84 species.