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A new Allocyclopina species (Copepoda, Cyclopoida, Cyclopinidae) from a hyporheic zone of the River Godavari, India, and comments on the morphological characters of the genus

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A new species of the genus Allocyclopina Kiefer, 1954 (Copepoda, Cyclopoida) is described from the brackish hyporheic zone of the River Godavari at Kotipalli, a small coastal village near Ramachandrapuram town in the East Godavari District of Andhra Pradesh State, India. This little-known genus, belonging to the large family Cyclopinidae, was hitherto represented by only three interstitial species: A. madagassica Kiefer, 1954, from Madagascar, A. ambigua Kiefer, 1960, from Reunion Island, and A. australiensis Karanovic, 2008, from South Australia. Allocyclopina inopinata new species, is the fourth representative of the genus and the first Asian representative of the genus. The specimens of A. inopinata n. sp., show a unique combination of both plesiomorphic and apomorphic character states in the female: first pedigerous somite free; antennule ten-segmented; antenna with an exopodal seta and a single inner seta on coxobasis; mandibular basis with one inner seta; maxillulary endopodite with seven setae, without coxal endite; legs 1–4 three-segmented, with last exopodite spine formula; second endopodal segment of leg 1 with a single seta, in both sexes; intercoxal plate of leg 5 reduced; leg 6 with two elements; genital double-somite showing two lateral copulatory pores, corresponding to two seminal receptacles, near its anterior margin; furcal rami with six setae each. The generic diagnosis of Allocyclopina is emended, and some morphological affinities with other genera in the family "Cyclopinidae" sensu lato are discussed. The status of A. australiensis is briefly discussed. Une nouvelle espèce du genre Allocyclopina Kiefer, 1954 (Copepoda, Cyclopoida) est décrite du milieu hyporhéique saumâtre du fleuve Godavari à Kotipalli, un petit village côtier près de Ramachandrapuram dans le district de Godavari Est, Etat de l'Andhra Pradesh, Inde. Ce genre peu connu, appartenant à la grande famille des Cyclopinidae était représenté jusqu'à présent par seulement trois espèces interstitielles: A. madagassica Kiefer, 1954, de Madagascar, A. ambigua Kiefer, 1960, de l'île de la Réunion, et A. australiensis, d'Australie du sud. Allocyclopina inopinata n. sp. est la troisième espèce du genre et la première découverte en Asie. Les spécimens de A. inopinata n. sp. présentent une combinaison unique d'états de caractères plésiomorphes et apomorphes chez la femelle: premier somite thoracique libre; antennule à 10 segments; coxobasis de l'antenne avec une soie exopodale et une seule soie interne; basis de la mandibule avec une soie interne; endopodite de la maxillule portant sept soies, sans endite coxale; rames de P1-P4 à trois segments et à formule des épines du troisième segment de l'endopodite; second segment de l'endopodite de P1 avec une seule soie (dans les deux sexes); plaque intercoxale de P5 très réduite; P6 comprenant deux éléments; double somite génital avec, dans sa partie antérieure ventrale, deux pores copulateurs correspondant à deux réceptacles séminaux; branches furcales portant six soies. La diagnose du genre Allocyclopina est émendée et certaines affinités morphologiques avec d'autres genres de la famille des «Cyclopinidae» sensu lato sont discutées. Le statut de A. australiensis est brièvement discuté.

Affiliations: 1: Muséum national d'Histoire naturelle, Département Milieux et Peuplements Aquatiques, C.P. 53, 61, rue de Buffon, F-75005 Paris, France; 2: Department of Zoology, Acharya Nagarjuna University, Nagarjunanagar 522 510, India


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