Glyptogidiella omanica gen. et sp. nov., an inland groundwater bogidiellid from Oman with enlarged coxal plate V (Crustacea, Amphipoda)
TL;DR: The habitus of Glyptogidiella is not typical for a dweller of a true interstitial niche, with its short antennae, large coxal plate and short and stubby rami on the third uropod, which suggests that the interstitial medium could not be the primary habitat for the species, and that the underground of wadis might contain interstices of large size and could also be in contact with karstic hollows.
Abstract: A new genus and species of Amphipoda is reported from inland ground waters of the Sultanate of Oman. Although Glyptogidiella omanica gen. et sp. nov. exhibits several features typical of the Bogidiellidae (i. e. combined display of distinct carpal lobe on first gnathopod, reduced pleopodal rami, and unsegmented exopodite of third uropod), its exceptionally large fifth coxal plate and short rami of third uropod do not fit in the restricted diagnosis of the family as recently presented elsewhere. In fact, the enlarged coxal plate V is a feature not reported in any other amphipod, whereas no other bogidiellid displays an expanded basis on pereopod VII. The habitus of Glyptogidiella is not typical for a dweller of a true interstitial niche, with its short antennae, large coxal plate and short and stubby rami on the third uropod. This suggests that the interstitial medium could not be the primary habitat for the species, and that the underground of wadis might contain interstices of large size and could also be in contact with karstic hollows.
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TL;DR: The Amphipoda includes a large clade defined by the presence of a previously unrecognised synapomorphy, apical robust setae on the rami of uropods 1-2, which is introduced for the first time in am-phipod classification, the level parvorder between infraorder and superfamily.
Abstract: The Amphipoda includes a large clade defined by the presence of a previously unrecognised synapomorphy, apical robust setae on the rami of uropods 1–2. We term this clade the Senticaudata subord. nov. (Latin: sentis = thorn). It includes almost all freshwater species as well as a number of marine benthic taxa, formerly part of the ‘Gammaridea’. The phylog-eny of the senticaudates was determined by cladistic analysis of morphological characters and character states. Within the suborder Senticaudata there are six infraorders: Carangoliopsida, Talitrida, Hadziida, Corophiida, Bogidiellida and Gam-marida. A classification is provided and all the senticaudate families are diagnosed. We introduce for the first time in am-phipod classification, the level parvorder between infraorder and superfamily. Four new families are described: Kairosidae; Eriopisidae; Nuuanuidae and Kergueleniolidae.
174 citations
TL;DR: A critical need is pointed towards to resolve relationships within the family using molecular approaches, along with the development of a suite of additional morphological characters for Bogidiellidae.
Abstract: Bogidiellidae is the most diverse and cosmopolitan family of stygobiotic amphipods, and inhabits a variety of subterranean biotopes, especially interstitial habitats. While the family is characterized by considerable sexual dimorphism, this dimorphism has adversely affected our understanding of the systematics of the group. Most species have restricted geographic ranges and occur in difficult to sample habitats, so it is common for individual species descriptions to be based on a single sex. In this work we revisit an analysis of morphological characters in an attempt to clarify their phylogenetic utility in resolving taxonomic relationships among genera by introducing a new species, two additional characters, and phylogenetic statistical support values. Eobogidiella venkataramani sp. n., from a spring fed brook in the Shirawati River basin along the escarpment of the Western Ghats (Karnataka, India) differs from the only known congener, Eobogidiella purmamarcensis, from Argentina, in the structure of mouthparts, the shape and ornamentation on gnathopods and characters of the telson. Our phylogenetic analyses indicate that the available morphological characters are not sufficient to resolve phylogenetic relationships within Bogidiellidae, thus these characters alone cannot be used to determine the phylogenetic placement of Eobogidiella venkataramani sp. n. within the family. Nevertheless, Eobogidiella venkataramani sp. n. shares diagnostic characters with Eobogidiella, supporting placement of the new species in this genus. Our findings point towards a critical need to resolve relationships within the family using molecular approaches, along with the development of a suite of additional morphological characters for Bogidiellidae. This is the third species of Bogidiellidae from southern India.
2 citations
Cites background from "Glyptogidiella omanica gen. et sp. ..."
...Our updated data set includes additional genera described by various authors since Koenemann and Holsinger’s (1999) analyses (Fidelidiella Jaume, Gràcia & Boxshall, 2007; Glyptogidiella Vonk & Jaume, 2010; Omangidiella Iannilli, Holsinger, Ruffo & Vonk, 2006, Racovella Jaume, Gràcia & Boxshall, 2007), three additional species (Patagongidiella wefkoi Pérez-Schultheiss, 2013; Xystriogidiella juliani Coleman, 2009; Eobogidiella venkataramani sp. n.), two additional morphological characters, and published taxonomic updates made by Koenemann and Holsinger (1999) as follows: Medigidiella (was Medigidiella A), Indogidiella (was Medigidiella C), Arganogidiella (was Medigidiella B), Bogidiella (niphargoides group) (was Bogidiella C), Bogidiella (skopljensis group) (was Bogidiella B), Bogidiella (albertimagni group) (was Bogidiella A), Stygogidiella (was Stygogidiella A), and Argentinogidiella (was Stygogidiella B)....
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...Vonk R, Jaume D (2010) Glyptogidiella omanica gen. et sp. n., an inland groundwater bogidiellid from Oman with enlarged coxal plate V (Crustacea, Amphipoda)....
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...…genera described by various authors since Koenemann and Holsinger’s (1999) analyses (Fidelidiella Jaume, Gràcia & Boxshall, 2007; Glyptogidiella Vonk & Jaume, 2010; Omangidiella Iannilli, Holsinger, Ruffo & Vonk, 2006, Racovella Jaume, Gràcia & Boxshall, 2007), three additional species…...
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...The new morphological characters address the hypertrophied coxa 5 in Glyptogidiella and the unique position of the coxal gills on pereonite 7 in Xystriogidiella juliani (Coleman 2009)....
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...…Longley 1980; Karaman 1981; Stock 1981; Ruffo 1973; Koenemann et al. 1998; Koenemann and Holsinger 1999; Iannilli et al. 2006; Jaume et al. 2007; Vonk and Jaume 2010; Leijs et al. 2011; Senna et al. 2014), but this work has not led to a coherent understanding of relationships within the family…...
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TL;DR: This is a contribution to Spanish MICINN project CGL2009-08256, in part co-financed with EU FEDER funds.
Abstract: This is a contribution to Spanish MICINN project CGL2009-08256, in part co-financed with EU FEDER funds.
2 citations
Cites background from "Glyptogidiella omanica gen. et sp. ..."
...In earlier years, several new stygobiont amphipods from this expedition throughout the north-east and south-east of the Sultanate have been described (Ruffo et al. 2003; Iannilli et al. Zootaxa 3335 © 2012 Magnolia Press · 55NEW METACRANGONYCTID AMPHIPOD FROM OMAN 2006; Vonk and Jaume 2010)....
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References
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TL;DR: A handbook for the identification of gammaridean amphipods to generic level through the use of artificial (non-phylogenetic) keys at the family-group level which lead to subsidiary keys to the genera of families or family groups.
Abstract: Keys, diagnoses and lists of species are presented for the marine families and genera of Gammaridea except those marinegammaroids treated by Barrtard& Barnard (1983). This work is a handbook for the identification of gammaridean amphipods to generic level through the use of artificial (non-phylogenetic) keys at the family-group level which lead to subsidiary keys to the genera of families or family groups. Genera in polytypic families are diagnosed and described sufficiently to fit the taxonomic complications within each group. Diagnoses of families are limited to those characters departing from a·gammaridean model which is diagnosed in words and illustrations; hence some families may have identical diagnoses. Therefore, cross-comparisons to similar families are made an organic part of each diagnosis. Family descriptions amplify the generalities of family characters. Relationships are identified not at phylogenetic level but in terms.of possible confusion in making identifications. The reader must cross-compare relationships among the several families that might be mentioned as part of the diagnoses because, to save space, all possible combinations are not replicated at every possible node. The same comparative method is generally but not exclusively used for the genera of each family. Multiple keys are provided for some of the more difficult families; taxa are often cited more tha, once in a key. A pictorial key to families operates with the same proviso that only the deviations from the model gammaridean are depicted. The pictorial key is arranged in reverse order so that the most anomalous taxa appear first and those closest to the model diagnosis are placed· at the end. This progression follows the idea that the most deviant taxa are the easiest to identify to family. level. The master key to families has the endpoints necessary to identify marine gammaroids by reference to Barnard & Barnard (1983); the two works are constructed .inparallel·fashion~·Families,andgenefawithin~families,areOfganisedalphabetically~ ·An index provides the principal reference for each genus and species. Where necessary, each taxon is supplied with notes on removals or major changes since 1965 which have not become common 2 Records of the Australian Museum (1991) Supplement 13 (Part 1) knowledge, or which are implemented herein. Each genus is supplied with a list of species and selected references. A geographic code, applied to each species, can be identified in the lists and maps of Bamard & Bamard (1983). A bibliography includes many publications not cited in the text but omits the marine gammaroids except for items published since 1980 which were not included in Bamard & Bamard (1983). Effective use of this handbook requires memorisation of a gammaridean model, skill in dissection following directions supplied herein, familiarity with the glossary, and acceptance of the idea that keys and diagnoses are only aids, not absolute endpoints.
675 citations
TL;DR: A classification system for crustacean setae based on the homology concept decapod crustaceans grooming gill and embryo grooming in lithodid crabs grooming structure and function in some terrestial crustacea.
Abstract: A classification system for crustacean setae based on the homology concept decapod crustacean grooming gill and embryo grooming in lithodid crabs grooming structure and function in some terrestial crustacea functional morphology of feeding morphology of feeding structures feeding mechanisms of the Mysidacea functional morphology of feeding of euphausiids development of the feeding apparatus in decapod crustaceans evolution of the foregut.
126 citations
TL;DR: A shallow alluvial coastal aquifer in the Batinah area of Oman, with sea-water intrusion that extends several kilometres inland, has been studied experimentally, analytically and numerically.
Abstract: A shallow alluvial coastal aquifer in the Batinah area of Oman, with sea-water intrusion that extends several kilometres inland, has been studied experimentally, analytically and numerically. The water table is proved to have a trough caused by intensive pumping from a fresh groundwater zone and evaporation from the saline phreatic surface. Resistivity traverses perpendicular to the shoreline indicated no fresh groundwater recharge into the sea. Using an analytical Dupuit-Forchheimer model, developed for the plain part of the catchment, explicit expressions for the water table, sharp interface location and stored volume of fresh water are obtained. It is shown that by the pumping of salt water from the intruded part of the aquifer, this intrusion can be mitigated. Different catchment sizes, intensities of fresh groundwater pumping, evaporation rates, water densities, sea level, incident fresh water level in the mountains and hydraulic conductivity are considered. SUTRA code is applied to a hypothetical case of a leaky aquifer with line sinks modeling fresh water withdrawal and evaporation. The numerical code also shows that pumping of saline water can pull the dispersion zone back to the shoreline.
83 citations
"Glyptogidiella omanica gen. et sp. ..." refers background in this paper
...In the coastal region of North Oman groundwater pumping exceeds annual precipitation by one third, causing storage depletion and ensuing water table drop and concurrent intrusion of seawater (Kacimov et al., 2009)....
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TL;DR: The United Arab Emirate lagoons display several generations of successively settled coastal spits, the study of which allows reconstruction of the Holocene shoreline changes from the end of the last marine transgression as mentioned in this paper.
38 citations
"Glyptogidiella omanica gen. et sp. ..." refers background in this paper
...Only 6000 years ago, the sea level in the region was about 2 m higher (Bernier et al., 1995); this might have enabled marine fossorial fauna to colonize the interstitial of alluvial deposits and the open pores of limestone cavities....
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TL;DR: The taxonomic structure of this group is completely revised above the species level, excluding 5 genera from the family and all remaining subgenera are elevated to generic level.
Abstract: The increasing number of world-wide discoveries of subterranean amphipods, especially during the last two decades, has led to additions of numerous new taxa in the stygobiont family Bogidiellidae s. lat. To date, the family is composed of 23 genera and 11 subgenera, and approximately 110 described species. However, given the uneven quality of generic and subgeneric diagnoses in the literature, there is considerable confusion regarding the status of some of the taxa at these levels. Even the family itself lacks a clear definition. In order to gain a better knowledge of the phylogeny of this group, a cladistic analysis, employing both PAUP 3.0s and MacClade, was performed on the genera and subgenera currently assigned to the Bogidiellidae s. lat. Supported by the results of this analysis, the taxonomic structure of this group is completely revised above the species level. The revision excludes 5 genera from the family, all remaining subgenera are elevated to generic level. Four taxa are split, resulting in 5 new genera. The family Bogidiellidae now consists of 33 genera. Die wachsende Zahl weltweiter Neuentdeckungen von Grundwasser-Amphipoden, insbesondere wahrend der letzten zwei Jahrzehnte, erweiterte die Stygobiontenfamilie Bogidiellidae s. lat., um zahlreiche neue Taxa. Bis heute sind in der Familie etwa 110 beschriebene Arten in 23 Gattungen und 11 Untergattungen zusammengefasst. Aufgrund der unterschiedlichen Qualitat diagnostischer Beschreibungen herrscht allerdings erhebliche Verwirrung hinsichtlich des taxonomischen Status einiger Gruppen. Sogar die Definition der Familie selbst ist relativ undeutlich. Um neue Einsichten in die Phylogenie der Bogidielliden s. lat., zu erhalten, fuhrten wir eine kladistische Analyse der Gattungen und Untergattungen unter Verwendung der Computerprogramme PAUP 3.0s und MacClade durch. Die Resultate dieser Analyse dienten als hilfreiche Erganzung bei der umfassenden taxonomischen Revision der Gattungen und Untergattungen. Funf Gattungen wurden aus der Familie entfernt und alle Untergattungen zu Gattungen erhoben. Das Aufspalten von vier Taxa resultierte in 5 neuen Gattungen. Die Familie Bogidiellidae besteht somit aus 33 Gattungen.
29 citations