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Arcotheres borradailei (Nobili, 1906) and Pinnotheres ridgewayi Southwell, 1911: a reassessment of characters and generic assignment of species to Arcotheres Manning, 1993 (Decapoda, Brachyura, Pinnotheridae)

In: Crustaceana
Authors:
Peter K. L. Ng 1Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377, Republic of Singapore

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Paul F. Clark 2Department of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD, England

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Santanu Mitra 3Crustacea Division, Zoological Survey of India, Fire Proof Spirit Building, 27 J. L. Nehru Road, Kolkata [Internationally known as: Calcutta] – 700016, West Bengal, India

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Appukuttannair Biju Kumar 4Department of Aquatic Biology & Fisheries, University of Kerala, Kariavattom, Thiruvananthapuram – 695581, Kerala, India

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The identity of the pea crab, Arcotheres borradailei (Nobili, 1906) is clarified. The holotype female is re-diagnosed, figured and its recent generic assignment to Arcotheres Manning, 1993, is discussed. A second poorly known species from India and Sri Lanka that resembles A. borradailei, Pinnotheres ridgewayi Southwell, 1911, is redescribed and assigned to Arcotheres. In addition, Pinnotheres sinensis atrinae Sakai, 1939, and Pinnotheres cyclinus Shen, 1932, from East Asia are re-examined and also referred to Arcotheres.

Hier wird die Identität des Muschelwächters Arcotheres borradailei (Nobili, 1906) geklärt. Der weibliche Holotyp wird erneut untersucht, gezeichnet und dessen jüngste Gattungszuordnung zu Arcotheres Manning, 1993 wird diskutiert. Eine zweite, wenig bekannte Art aus Indien und Sri Lanka, Pinnotheres ridgewayi Southwell, 1911, welche A. borradailei ähnelt, wird neu beschrieben und Arcotheres zugeordnet. Zusätzlich werden Pinnotheres sinensis atrinae Sakai, 1939 und Pinnotheres cyclinus Shen, 1932 aus Ostasien erneut untersucht und ebenfalls der Gattung Arcotheres zugeordnet.

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