Ralph Saunders

Phylogenetic and morphological resolution of the Helobdella stagnalis species-complex (Annelida: Clitellata: Hirudinea)

Naim Saglam, U. Kutschera, Ralph Saunders, William Mark Saidel et autres

Phylogenetic and morphological resolution of the Helobdella stagnalis species-complex (Annelida: Clitellata: Hirudinea)

Naim Saglam, U. Kutschera, Ralph Saunders, William Mark Saidel et autres

Gene Expression Underlying Teloblast Formation in Leech (Annelida: Hirudinae)

Samuel Hsiao, Naim Sağlam, Ralph Saunders, Daniel H. Shain

Objective: Species of glossiphoniid leech provide model systems for exploring fundamental questions in evolutionary and developmental biology. In this study, we took advantage of large embryonic cells and stereotypical cleavage patterns in the leech, Helobdella austinensis , to identify genes associated with …

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An ice inhabiting bdelloid rotifer from North America

Lydia M Dimattia, Naim Sağlam, Ralph Saunders, Daniel H. Shain

Bdelloid rotifers are major components of zooplankton worldwide and have been reported in glacier ice in both Northern and Southern Hemispheres. Curiously, no reports of psychrophilic bdelloids have surfaced in North America despite exhaustive surveys of other ice-dwelling invertebrates, e.g., glacier ice …

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Species delimitation recovers undescribed Erpobdellidae (Annelida: Hirudinea) from USA and Türkiye

Naim Sağlam, Ralph Saunders, Daniel H. Shain

Erpobdellid leeches are morphologically similar to each other and thus cause confusion in taxonomic identification. In particular, annuli, colour and eye patterns are very close across species which creates difficulties in external morphological resolution. Here we describe six new species of Erpobdellidae …

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Flora of Singapore precursors, 28: Taxonomic and nomenclatural clarification of Kadsura species (Schisandraceae) in Singapore

Junhao Chen, Xin Yi Ng, Rosalind Lim, Hock Keong Lua et autres

Recent taxonomic and floristic accounts list Kadsura scandens (Blume) Blume as the sole native Kadsura species in Singapore. However, these works have overlooked Ridley’s earlier documentation of another species, Kadsura verrucosa (Gagnep.) A.C.Sm., which was recorded under the misapplied name K. cauliflora. …

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Detailed ultrastructure of the Hirudo (Annelida: Hirudinea) salivary gland

Naim Sağlam, Ralph Saunders, Daniel H. Shain, William Mark Saidel

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Correct spelling of a recently described species of Helobdella (Annelida: Clitellata: Hirudinea)

Naim Sağlam, U. Kutschera, Ralph Saunders, William Mark Saidel et autres

In a recently published article (Saglam et al. 2018) the name of a new species of Hirudinea (Annelida, Clitellata) was simultaneously published in three different ways, as Helobdella serendipitious (Saglam et al. 2018: 61, 70, 71, 73), Helobdella serendipitous (ibid.: 63, 65, …

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Phylogenetic and morphological resolution of the Helobdella stagnalis species-complex (Annelida: Clitellata: Hirudinea)

Naim Sağlam, U. Kutschera, Ralph Saunders, William Mark Saidel et autres

The glossiphoniid freshwater leech, Helobdella stagnalis, was described by Linnaeus 1758 based on common European specimens. The presence of a brown, chitinous scute on the dorsal-anterior surface, as observed on leeches elsewhere in the world, has generally led to the classification of …

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Phylogeny and cocoon production in the parasitic leech Myzobdella lugubris Leidy, 1851 (Hirudinidae, Piscicolidae)

Naim Sağlam, Ralph Saunders, Shirley A. Lang, Daniel H. Shain

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Elaborate ultrastructure of the Hirudo (Annelida: Hirudinae) cocoon surface

William Mark Saidel, Naim Sağlam, David Salas‐de la Cruz, Ralph Saunders et autres

Species of medicinal leeches (Hirudo medicinalis, H. verbana, and H. sulukii) secrete hard-shelled cocoons. When initially deposited, a cocoon is surrounded by a foam. Over a short time, the foam is transformed into a three-dimensional structure. We show here that this peripheral …

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A new species of Hirudo (Annelida: Hirudinidae): historical biogeography of Eurasian medicinal leeches

Naim Sağlam, Ralph Saunders, Shirley A. Lang, Daniel H. Shain

Species of Hirudo are used extensively for medicinal purposes, but are currently listed as endangered due to population declines from economic utilization and environmental pollution. In total, five species of Hirudo are currently described throughout Eurasia, with Turkey being one of the …

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