Browsing by Author "Siddall, Mark Edward, 1966-"

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    Hirudinea from the Apolobamba in the Bolivian Andes, including three new species of Helobdella (Clitellata, Hirudinea). American Museum novitates ; no. 3341
    (New York, NY : American Museum of Natural History, 2001) Siddall, Mark Edward, 1966-
    Four species of leeches were found in the Apolobamba Range of the Bolivian Andes. Collections were made from 4100 m down to 2820 m--among the highest collecting localities ever for leeches. There were three new species in the genus Helobdella including Helobdella ringueleti, Helobdella nununununojensis, and Helobdella sorojchi, as well as one representative of Cylicobdella coccinea. One of the new species exhibited an attitude of parental care unique among glossiphoniids in that the brood was enclosed within two halves of the folded parent. None of these species is known to be sanguivorous.
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    Leech collections from Chile including two new species of Helobdella (Annelida, Hirudinida). American Museum novitates ; no. 3457
    (New York, NY : American Museum of Natural History, 2004) Siddall, Mark Edward, 1966-; Borda, Elizabeth.
    Twelve species of leeches were collected from Reserva Nacional Yerba Loca, near Santiago, IX Región de la Araucania and X Región de los Lagos, Chile. Included were representatives of the unusual Chilean taxa Americobdella valdiviana, Mesobdella gemmata, and two species of Patagoniobdella, each of whose phylogenetic placement and classification has been problematic. Eight species of Glossiphoniidae were found, including two new species in the genus Helobdella. Helobdella wodzickiorum, n.sp. possesses a large, prominent atrium and male sperm ducts extending to somite XXIII, whereas Helobdella pichipanan, n.sp. has micromorphic male genitalia, a weakly developed atrium, and ejaculatory ducts that extend only to XII/XIII. The phylogenetic positions of A. valdiviana, M. gemmata, and Patagoniobdella species are discussed.
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    Leech collections from Washington State, with the description of two new species of Placobdella (Annelida, Glossiphoniidae). (American Museum novitates, no. 3701)
    (American Museum of Natural History., 2010) Oceguera-Figueroa, Alejandro.; Kvist, Sebastian.; Watson, Sara C.; Sankar, Dominic F.; Overstreet, Robin M.; Siddall, Mark Edward, 1966-
    An assessment of the hirudinifauna of Washington State is presented. In total, 11 distinct leech species were found representing two new records for the state and two new species of the genus Placobdella, both described herein. Placobdella kwetlumye, n. sp., and Placobdella sophieae, n. sp., both collected in Squires Lake, Whatcom County, are morphologically similar to P. burresonae and P. pediculata respectively, but exhibit morphological features that readily separate them from congeners. In addition to the descriptions of the new species, here we provide a brief summary of the morphological traits possessed by each species found.
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    Leeches from Chiapas, Mexico, with a new species of Erpobdella (Hirudinida, Erpobdellidae). (American Museum novitates, no. 3895)
    (American Museum of Natural History., 2018-03-12) Tessler, Michael.; Siddall, Mark Edward, 1966-; Oceguera-Figueroa, Alejandro.
    Freshwater leeches were collected from Chiapas, Mexico. Among these collections and prior records, a total of nine species were found, comprising six genera and four families. One species, Diestecostoma octannulata, represents a new record for Mexico and two species, Helobdella elongata and H. octatestisaca, represent new records for Chiapas. Additionally, a new species of Erpobdella was discovered from a single stream in the park El Arcotete near San Cristobal de las Casas. Here it is described as Erpobdella adani and it is morphologically distinguished from Mexican Erpobdella species by the combination of having the whole body strongly dorsoventrally flattened, three annuli between gonopores, an enlarged male gonopore, and no preatrial loops for the male reproductive system. Based on sequence data (mitochondrial cytochrome c oxidase subunit I and 12S; nuclear 18S), this new species appears most closely related to a clade formed by E. coastalis and E. ochoterenai. Both mitochondrial cytochrome c oxidase subunit I molecular barcodes and morphological descriptions of the collected species are presented.
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    Leeches of Laguna Volcán, Bolivia, including a new species of Helobdella (Clitellata, Hirudinea). American Museum novitates ; no. 3313
    (New York, NY : American Museum of Natural History, 2001) Siddall, Mark Edward, 1966-
    Three species of leeches were found in Laguna Volcán in Departmento de Santa Cruz, Bolivia. None are known to be sanguivorous. Two of the species found, Semiscolex similis and Helobdella triserialis, are known to be broadly distributed in South America. A new species, Helobdella bolivianita, is described. Diagnostic characters for this species include a nuchal scute on somite VIII and the possession both of compact salivary glands and of diffuse parenchymal salivary tissue.
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    Molecular determination of the phylogenetic position of a species in the genus Colpodella (Alveolata). American Museum novitates ; no. 3314
    (New York, NY : American Museum of Natural History, 2001) Siddall, Mark Edward, 1966-; Reece, Kimberly S.; Nerad, Tom A.; Burreson, Eugene M.
    The phylogenetic position of a species of the free-living protist genus Colpodella is assessed using its SSU rDNA gene sequence in the context of a wide array of other alveolate taxa. Phylogenetic analyses indicates that this species is not related to species of Bodo as has previously been suggested. However, SSU rDNA data alone are insufficient to provide a wholly stable hypothesis of relationships for Colpodella sp. among the various alveolate phyla. Much of this instability can be attributed to alignment procedure sensitivity. Analyses of SSU rDNA and actin gene sequences in combination provide strong support for a species of Colpodella as sister group to the ciliates, irrespective of alignment procedure. Moreover, use of SSU rDNA data alone strongly support a recent common ancestry of the genera Perkinsus and Parvilucifera with the dinoflagellates, and not with the apicomplexans. These findings, and the nearly identical ultrastructural characteristics of Colpodella, Perkinsus, and Parvilucifera species, suggest that this morphology is the ancestral condition for all of Alveolata.
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    A new species of leech from the New York metropolitan area ; American Museum novitates, no. 3578
    (New York, NY : American Museum of Natural History, 2007) Hughes, J. Leslie.; Siddall, Mark Edward, 1966-
    Placobdella ali, n.sp., a sanguivorous glossiphoniid leech, is described from material collected in Harriman State Park, approximately 50 km north of the island of Manhattan, New York City. The new species resembles Placobdella ornata and could be easily confused with Placobdella papillifera. Dorsal papillation and internal reproductive anatomy distinguish P. ali from existing descriptions of the latter. Ventral pigmentation and salivary anatomy distinguish it from the former.
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    Redescription, phylogenetic placement, and taxonomic reassignment of Mesobdella lineata (Sciacchitano, 1959) (Hirudinida, Arhynchobdellida) (American Museum novitates, no. 3711)
    (American Museum of Natural History., 2011) Phillips, Anna J.; Oosthuizen, J. H. (Johannes Hendricus); Siddall, Mark Edward, 1966-
    Mesobdella lineata, a small terrestrial species of leech from southern Africa, originally placed in the family Haemadipsidae, is redescribed based on internal and external morphological characters of the holotype and of additional material collected in 1975. The placement of this species in the South American genus Mesobdella on the basis of seemingly triannulate midbody somites is found to be erroneous as midbody somites are five-annulate. Mesobdella lineata has neither the midventral nephridial pore, a synapomorphy of Xerobdellidae, nor the posteriolateral auricles of Haemadipsidae. With a caudal sucker that is wider than the four most posterior somites of the body, eight teeth per jaw, micromorphic median reproductive structures, and no postanal annuli, this species is placed in the mammalophilic family Praobdellidae. A morphological matrix of 32 characters was analyzed with parsimony and implied weighting. The new genus Parapraobdella is warranted to accommodate the unique combination of characters of the species that is morphologically similar to Neotropical representatives of the family.
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    Two new species of salifid leeches (Arhynchobdellida, Erpobdelliformes, Salifidae) from South Africa and Madagascar. American Museum novitates ; no. 3456
    (New York, NY : American Museum of Natural History, 2004) Westergren, Stephanie.; Siddall, Mark Edward, 1966-
    Two new species of salifid leech are described. Linta be, n.gen., n.sp., from Madagascar, is the first record of a freshwater leech on that island. Its possession of characteristics both of the Erpobdelliformes and the Hirudiniformes suggests it is a morphologically significant link between these two lineages. Barbronia gwalagwalensis, n.sp., looks externally similar to the widespread Barbronia weberi, but internally exhibits features more similar to other African species of the genus.