An extraordinary new fluvial bdelloid rotifer, Coronistomus impossibilis gen. nov., sp. nov., with adaptations for turbulent flow (Rotifera: Bdelloidea: Coronistomidae fam. nov.)

Zootaxa ◽  
2021 ◽  
Vol 4966 (1) ◽  
pp. 16-28
Author(s):  
AYDIN ÖRSTAN
Keyword(s):  
New Species ◽  
Turbulent Flow ◽  
Body Length ◽  
New Genus ◽  
Ventral Side ◽  
Caudal Appendage ◽  
Bdelloid Rotifer ◽  
New Family ◽  
The Family ◽  
Rotifera Bdelloidea

A new bdelloid rotifer, Coronistomus impossibilis gen. nov., sp. nov. is described from the Hawlings River in Maryland, USA. The new species is a non-swimming sediment dweller that exceeds 550 µm in body length. Its corona is a weakly bilobed ciliated field on the ventral side of the head with lateral borders continuing into mouth. The species has ramate trophi that have on each half three widely spaced major teeth with two interproximal teeth. The foot lacks spurs and ends with a pair of long, thick ventral toes and a medially positioned caudal appendage. The new species lives in microhabitats exposed to turbulent flow and its morphological idiosyncrasies are interpreted as adaptations to reduce the likelihood of getting dislodged by the water. Although the corona morphology and the caudal appendage of the new species are similar to the corresponding traits of some of the species in the family Philodinavidae, the structure of its nonprotrusible trophi and its possession of only two toes (as opposed to four) separate it from all other members of the Philodinavidae. Therefore, a new family, Coronistomidae fam. nov., is erected for the new genus Coronistomus. 

scholarly journals A rare case of an evolutionary late and ephemeral biomineralization: tunicates with composite calcareous skeletons

2020 ◽  
Vol 94 (4) ◽  
pp. 748-757
Author(s):  
Jobst Wendt
Keyword(s):  
New Species ◽  
New Genus ◽  
Lower Jurassic ◽  
Late Triassic ◽  
Cambrian Explosion ◽  
New Order ◽  
Colonial Ascidian ◽  
New Family ◽  
The Family ◽  
Almost All

AbstractIn contrast to almost all other invertebrate phyla that constructed biomineralized skeletons during the “Cambrian explosion” and maintained them during the entire fossil record, ascidian tunicates evolved this protective and stabilizing advantage only during the Permian, although soft-bodied representatives of this subphylum made their first appearance already in the early Cambrian. It remains enigmatic why these compound calcareous skeletons persisted only until the Late Triassic, subsequently followed by less-rigid internal skeletons from the Lower Jurassic onwards, which consist of scattered isolated spicules only. In addition to recently described aragonitic ascidian exoskeletons from the Permian and Triassic, new discoveries of similar, but colonial ascidian compound endoskeletons in the lower Carnian exhibit a short-living branch of this group, which moreover contain the first indubitable calcareous spicules. The latter are embedded in the solid endoskeleton, which is composed of polygonal aragonitic plates with smooth outer and zigzag lined inner boundaries. They consist of irregular, parallel (orthogonal), or fan-shaped (clinogonal) arrangements of acicular aragonite crystals. The following taxa are described as new: order Cassianomorpha new order with the family Cassianosomidae new family and the genus Toscanisoma new genus with the species T. multipartitum new species and T. triplicatum new species.UUID: http://zoobank.org/03555353-cdab-42e8-8e99-9bfce15fa249

Permian Gastropoda of the southwestern United States: Subulitacea

1988 ◽  
Vol 62 (01) ◽  
pp. 56-69 ◽  
Author(s):  
Douglas H. Erwin
Keyword(s):  
United States ◽  
New Species ◽  
New Mexico ◽  
New Genus ◽  
Southwestern United States ◽  
New Family ◽  
West Texas ◽  
Permian System ◽  
The Family ◽  
The Status

The composition of Permian members of the superfamily Subulitacea is considered, and 12 new species of Subulitacea are described from the silicified fauna of the Permian System of West Texas and New Mexico. Other elements of the gastropod fauna were previously described by Yochelson (1956a, 1960) and Batten (1958).The new genusIschnoptygmais established for subulitaceans possessing a plate-like columellar fold, and includes the new speciesIschnoptygma archibaldiandI. valentinei.The genus is placed within the new family Ischnoptygmidae. New species of Subulitidae areCeraunocochlis deformis, C. elongata, C. kidderi, C. trekensis, Strobeus girtyi, Soleniscus diminutus, S. variabilis, Cylindritopsis hamiltonae, andC. spheroides.The status of the genusLabridensis questioned, but provisionally retained. The assignment of the family Meekospiridae to the Subulitacea is questioned, and a single new species,Meekospira mimiae, is described.

Taxonomy of Paraplatyarthrus Javidkar and King (Isopoda: Oniscidea: Paraplatyarthridae) with description of five new species from Western Australia, and comments on Australian Trichorhina Budde-Lunde, 1908 (Platyarthridae)

Zootaxa ◽  
2017 ◽  
Vol 4243 (3) ◽  
pp. 401 ◽  
Author(s):  
MOHAMMAD JAVIDKAR ◽  
RACHAEL A. KING ◽  
STEVEN J. B. COOPER ◽  
WILLIAM F. HUMPHREYS ◽  
ANDREW D. AUSTIN
Keyword(s):  
New Species ◽  
Western Australia ◽  
New Genus ◽  
Type Material ◽  
Molecular Evidence ◽  
Surface Species ◽  
New Genus And Species ◽  
Australian Species ◽  
New Family ◽  
The Family

The oniscidean fauna of Australia is generally poorly known but recent sampling has revealed a new family, Paraplatyarthridae, found in both terrestrial and groundwater calcretes of central Western Australia. The family was initially described based on a new genus and species, Paraplatyarthrus subterraneus Javidkar and King, 2015. Here we describe an additional five Paraplatyarthrus species from the Yilgarn region of Western Australia, based on both morphological and molecular evidence (COI divergences). Four species are subterranean: P. crebesconiscus Javidkar and King sp. nov., P. cunyuensis Javidkar and King sp. nov., P. occidentoniscus Javidkar and King sp. nov., and P. pallidus Javidkar and King sp. nov., and one is a surface species, P. nahidae Javidkar and King sp. nov. A key to their identification is provided along with information on their distribution. In addition, type material of the two described Australian species of Platyarthridae, Trichorhina australiensis Wahrberg, 1922 from Western Australia and T. tropicalis Lewis, 1998 from Queensland, are examined. Morphological reassessment of type material shows T. australiensis belongs to Paraplatyarthrus (comb. nov.) and that T. tropicalis is correctly placed in Trichorhina, confirming that the genus and family Platyarthridae occur in Australia.  

Mesoparasitic copepods (Copepoda: Cyclopoida) associated with polychaete worms in European seas

Zootaxa ◽  
2019 ◽  
Vol 4579 (1) ◽  
pp. 1
Author(s):  
GEOFF A. BOXSHALL ◽  
MYLES O’REILLY ◽  
ANDREY SIKORSKI ◽  
REBECCA SUMMERFIELD
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Host Record ◽  
New Genera ◽  
New Host ◽  
New Host Record ◽  
New Family ◽  
The Family ◽  
New Host Records

A large collection of mesoparasitic copepods from polychaete hosts collected in northern European waters was examined. The term mesoparasitic refers to highly transformed copepods where the adult female attaches by embedding part of its body in the host. Representatives of five known familes were found and a new family is established. A single new species, Bradophila minuta sp. nov., was described in the family Bradophilidae. It occurred exclusively on the flabelligerid Diplocirus glaucus (Malmgren, 1867). Two genera of the family Herpyllobiidae were represented: Herpyllobius Steenstrup & Lütken, 1861 and Eurysilenium M. Sars, 1870. Herpyllobius arcticus Steenstrup & Lütken, 1861 was found on at least five different polynoid hosts, two of which, Harmothoe fragilis Moore, 1910 and Antinoe sp., were new host records. A new species, H. cluthensis sp. nov. was described from Malmgrenia species in Scottish waters. The large species, Herpyllobius cordiformis Lützen, 1964, was collected in Arctic waters from Eunoe cf. oerstedi. It is the first report of this parasite in Europe. The common parasite H. polynoes (Krøyer, 1864) was found on six different polynoid hosts, three of which, Harmothoe bifera, Malmgreniella mcintoshi Tebble & Chambers, 1982 and Eunoe ?barbata are new host records. Eurysilenium truncatum M. Sars, 1870 was collected from Eucranta villosa Malmgren, 1866, Eunone sp., and Gattyana cirrhosa (Pallas, 1766). The material from Eucranta villosa caught at 72.6ºN comprises both a new host record and is the most northerly report of this parasite. Specimens of Eurysilenium which differed from E. truncatum in a number of features were found on Harmothoe fragilis and H. impar (Johnston, 1839). A new family, the Pholoicolidae, is established to accommodate Pholicola chambersae gen. et sp. nov., parasitic on Pholoe pallida Chambers, 1985. The family Phyllodicolidae was represented by all three of its known species: Phyllodicola petiti (Delamare Deboutteville & Laubier, 1960), Cyclorhiza eteonicola Heegaard, 1942 and C. megalova Gotto & Leahy, 1988. The former was found on Eumida ockelmanni Eibye-Jacobsen, 1987, a new host record. A single ovigerous female of C. eteonicola was collected from a new host, Eteone spetsbergensis Malmgren, 1865. Cyclorhiza megalova was common on Eteone longa (Fabricius, 1780) and E. longa/flava complex. A rich diversity of members of the family Saccopsidae was found, including three known species of Melinnacheres M. Sars, 1870 plus nine new species placed in four new genera. Melinnacheres was represented by M. ergasiloides M. Sars, 1870, M. steenstrupi Bresciani & Lützen, 1961 and M. terebellidis Levinsen, 1878. Melinnacheres ergasiloides was found on Melinna elizabethae McIntosh, 1914, M. steenstrupi on members of the Terebellides stroemi-complex and T. atlantis Williams, 1984, while M. terebellidis was found on the T. stroemi-complex and on T. shetlandica Parapar, Moreira & O'Reilly, 2016. A new genus, Trichobranchicola gen. nov., was established to accommodate T. antennatus gen. et sp. nov., a parasite of Trichobranchus sikorskii Leontovich & Jirkov in Jirkov, 2001, T. glacialis Malmgren, 1866 and Trichobranchus sp. The second new genus, Lanassicola gen. nov., was established to accommodate the type species, Lanassicola arcticus gen. et sp. nov. parasitic on Lanassa venusta (Malm, 1874), plus two additional species, L. bilobatus gen. et sp. nov. on Lanassa nordenskjoeldi Malmgren, 1866, and L. dorsilobatus gen. et sp. nov. on Proclea graffii (Langerhans, 1884). A new subfamily, Euchonicolinae, was established within the Saccopsidae to accommodate two new genera, Euchonicola gen. nov. and Euchonicoloides gen. nov. The type species of Euchonicola gen. nov. is E. caudatus gen. et sp. nov., a parasite of Euchone sp., and it includes two other species, E. linearis gen. et sp. nov. on Chone sp., and E. parvus gen. et sp. nov. on Euchone sp. The type species of Euchonicoloides gen. nov. is E. elongatus gen. et sp. nov. found on a host belonging to the genus Euchone, and it also includes Euchonicoloides halli gen. et sp. nov. from Jasmineira caudata Langerhans, 1880. Four species of the family Xenocoelomidae were found: Xenocoeloma alleni (Brumpt, 1897), X. brumpti Caullery & Mesnil, 1915, X. orbicularis sp. nov. and Aphanodomus terebellae (Levinsen, 1878). Xenocoeloma alleni was found on four different species of Polycirrus and on Amaeana trilobata (M. Sars, 1863) and X. brumpti was found on Polycirrus norvegicus Wollebaek, 1912. Xenocoeloma orbicularis sp. nov. occurred only on Paramphitrite birulai (Ssolowiew, 1899). Aphanodomus terebellae was found on three hosts, only one of which, Leaena abranchiata was new. 

Permian Gastropoda of the southwestern United States: Subulitacea

1988 ◽  
Vol 62 (1) ◽  
pp. 56-69 ◽  
Author(s):  
Douglas H. Erwin
Keyword(s):  
United States ◽  
New Species ◽  
New Mexico ◽  
New Genus ◽  
Southwestern United States ◽  
New Family ◽  
West Texas ◽  
Permian System ◽  
The Family ◽  
The Status

The composition of Permian members of the superfamily Subulitacea is considered, and 12 new species of Subulitacea are described from the silicified fauna of the Permian System of West Texas and New Mexico. Other elements of the gastropod fauna were previously described by Yochelson (1956a, 1960) and Batten (1958).The new genus Ischnoptygma is established for subulitaceans possessing a plate-like columellar fold, and includes the new species Ischnoptygma archibaldi and I. valentinei. The genus is placed within the new family Ischnoptygmidae. New species of Subulitidae are Ceraunocochlis deformis, C. elongata, C. kidderi, C. trekensis, Strobeus girtyi, Soleniscus diminutus, S. variabilis, Cylindritopsis hamiltonae, and C. spheroides. The status of the genus Labridens is questioned, but provisionally retained. The assignment of the family Meekospiridae to the Subulitacea is questioned, and a single new species, Meekospira mimiae, is described.

A review of mesozoic acanthopterygian fishes, with special reference to those of the English chalk

1964 ◽  
Vol 247 (739) ◽  
pp. 213-482 ◽  
Keyword(s):  
New Species ◽  
Special Reference ◽  
New Genus ◽  
New Order ◽  
New Family ◽  
The Family ◽  
Two New Species

Acid preparation of fishes from the English Chalk allows very detailed descriptions to be prepared. The acanthopterygians of the English Chalk are redescribed, and members of all the genera known by more than one specimen are treated at length. The English Chalk genera of Ctenothrissiformes, a group confined to the Cenomanian and Lower Turonian, are also described in detail, since this group is often cited as possibly ancestral to the acanthopterygians. The acanthopterygians and Ctenothrissiformes of all other Mesozoic deposits are more briefly described. The main systematic conclusions are as follows. A new order Ctenothrissiformes is made, to replace the Bathyclupeiformes, since Bathyclupea is a percoid. Within the Ctenothrissiformes, a new family Aulolepidae is made to contain Aulolepis and Pateroperca (the latter was formerly thought to be a percoid). The order Berycifbrmes is divided into three new sub-orders, Polymixioidei, Dinopterygoidei and Berycoidei. The Polymixioidei contains two families, the Polymixiidae, ranging from the Cenomanian to the present, and a new monotypic family Sphenocephalidae, confined to the Upper Senonian. The family Berycopsidae is rejected, and Berycopsis is placed in the Polymixiidae. Platycormus is shown to be a synonym of Berycopsis. The Dinopterygoidei contains the Upper Senonian Dinopterygidae and three new monotypic families, the Aipichthyidae, Pharmacichthyidae and Pycnosteroididae, all of which are confined to the Cenomanian. The Berycoidei contains eleven families, all with living representatives, of which only the Trachichthyidae and Holocentridae are present in the Mesozoic. A new genus of Trachichthyidae, Tubantia, from the Upper Senonian of Westphalia, is made. The genus Hoplopteryx, previously placed in the Berycidae, is shown to be a trachichthyid, and two new species of H. macranthus and H. gephyrognathus, both from the English Chalk, are described. Among the Perciformes, a new genus of Serranidae, Proseanu, is made for a species from the Danian of Sweden, and Bathysoma, from the same horizon and locality, is shown to be a member of the Menidae. The genus previously thought to be a percoid, is shown to be a member of the Tselfatiidae (Beloniformes). It is suggested that Protiacnhus, previously placed in the perciform sub-order Balistoidei, may be related to the Aulostomiformes.

New early Devonian gastropods from the families Crassimarginatidae (new family) and Scoliostomatidae (new family), Royal Creek Area, Yukon Territory, Canada

2002 ◽  
Vol 76 (2) ◽  
pp. 246-255 ◽  
Author(s):  
Jiří Frýda ◽  
Robert B. Blodgett ◽  
Alfred C. Lenz
Keyword(s):  
New Species ◽  
New Genus ◽  
Yukon Territory ◽  
New Genera ◽  
Morphological Comparison ◽  
The Czech Republic ◽  
Early Devonian ◽  
The Road ◽  
New Family ◽  
The Family

Two new distinctive families, Crassimarginatidae and Scoliostomatidae, each characterized by unusual gerontic apertural morphotypes, are established on the basis of study of the richly diverse Lower Devonian gastropod fauna of the Road River Formation in the Royal Creek area, Yukon Territory. The Early Devonian genus Crassimarginata Jhaveri, 1969, is transferred from the family Palaeotrochidae and placed, together with the new genus Yukonoconcha, into the new family Crassimarginatidae, which is characterized by a pupiform shell with an explanate outer apertural lip in the gerontic growth stage. The new family Scoliostomatidae unites Devonian gastropod genera (Scoliostoma Braun, 1838; Brilonella Kayser, 1873; Anarconcha Horný, 1964; Eoscoliostoma new genus; Mitchellia Koninck, 1877; and Pseudomitchellia new genus), which are characterized by a distinctive, free, twisted (both outwards and backwards) gerontic final half whorl. More detailed morphological comparison of members of this family has allowed their division into two new subfamilies: the Scoliostomatinae and Mitchelliinae. New genera include Yukonoconcha, Eoscoliostoma, and Pseudomitchellia. The former two genera are represented each by a single new species from Yukon Territory, Yukonoconcha pedderi and Eoscoliostoma norrisi. The latter genus is represented by two species, the type Pseudomitchellia bohemica (Perner) from the Koněprusy Limestone (Pragian) of the Czech Republic and Pseudomitchellia macqueeni new species from Yukon Territory.

Kotumsaridae, a new family of subterranean amphipod crustaceans from India, with description of Kotumsaria bastarensis, new genus, new species

Zootaxa ◽  
2007 ◽  
Vol 1589 (1) ◽  
pp. 33-46 ◽  
Author(s):  
MOHAMMED MESSOULI ◽  
JOHN R. HOLSINGER ◽  
Y. RANGA REDDY
Keyword(s):  
New Species ◽  
New Genus ◽  
Indian Subcontinent ◽  
Morphological Characters ◽  
New Taxon ◽  
New Genus And Species ◽  
The Third ◽  
New Family ◽  
The Family ◽  
Phylogenetic Affinities

Kotumsaridae, a new family of amphipod crustaceans is described from Kotumsar Cave in the state of Chhattisgarh, India. The family is based on Kotumsaria bastarensis, new genus and species, which is the only known member of the new family recorded to date. Although the new family appears to share some morphological characters with several other taxa from the southern hemisphere considered members of the superfamily Crangonyctoidea, including the New Zealand endemic genus Paracrangonyx, both its taxonomic and phylogenetic affinities remain unclear. Specimens of the new taxon, measuring just over 2 mm in length, were collected from the sediments of a pool in Kotumsar Cave but are believed to have migrated from deeper interstices. Kotumsaria bastarensis is only the third subterranean amphipod recorded to date from the Indian subcontinent.

A review of the hyperiidean amphipod families Mimonectidae and Proscinidae (Crustacea: Amphipoda: Hyperiidea: Scinoidea)

Zootaxa ◽  
2012 ◽  
Vol 3533 (1) ◽  
pp. 1 ◽  
Author(s):  
WOLFGANG ZEIDLER
Keyword(s):  
New Species ◽  
New Genus ◽  
Zoological Museum ◽  
Nominal Species ◽  
New Genus And Species ◽  
Unique Type ◽  
New Family ◽  
The Family ◽  
Three New Species ◽  
Review Ofthe

A taxonomic review of the hyperiidean amphipod families Mimonectidae and Proscinidae, superfamily Sciniodea, is pre-sented, based predominantly on collections held by the Zoological Museum, University of Copenhagen, Denmark. Priorto this review the family Mimonectidae consisted of two genera, Mimonectes with five species and Pseudomimonecteswith one species, and the family Proscinidae consisted of three genera, Proscina with five species, Mimoscina with twospecies and Cheloscina with one species. The five nominal species of Mimonectes are also recognised in this review withthe addition of three new species, M. alexanderi sp. nov., M. colemani sp. nov. and M. neosphaericus sp. nov. No morespecimens of Pseudomimonectes were found, and this genus is still known only from the unique type. A critical review ofthe family Proscinidae is presented arguing that its taxonomic distinction from the family Mimonectidae cannot be main-tained. Amongst the genus Proscina, P. scinoides (Woltereck, 1906) is considered a species of Mimoscina and P. magnaStephensen and Pirlot, 1931 a junior synonym of Mimonectes loveni Bovallius, 1885. The remaining three species are con-sidered valid for the time being and are transferred to the genus Mimonectes. Thus, eleven species of Mimonectes are rec-ognised in this review. Cheloscina, still known only from the unique type, is also similar to Mimonectes, apart from themorphology of the first antennae, and is here included in the family Mimonectidae. Mimoscina however possesses severalcharacters distinguishing it from other members of the Mimonectidae and a new family, Mimoscinidae fam. nov. is pro-posed to accommodate it. The two nominal species of Mimoscina are also recognised in this review with the addition ofone new species, M. galbraithae sp. nov. Amongst the extensive Dana collections is one specimen that clearly belongswith the Scinoidea but possesses several unique characters that preclude it from all other currently recognised families.Thus, a new family, Microscinidae fam. nov. is proposed to accommodate this new genus and species, Microscina rostratagen. et sp. nov. Keys are provided for all families, genera and species, together with diagnoses, and all species are illustrated.

scholarly journals Memoirs: On some remarkable new Forms of Caryophyllaeidae from the Anglo-Egyptian Sudan, and a Revision of the Families of the Cestodaria

1923 ◽  
Vol s2-67 (267) ◽  
pp. 435-472
Author(s):  
W. N. F. WOODLAND
Keyword(s):  
Life History ◽  
New Species ◽  
New Genus ◽  
The Body ◽  
Caudal Appendage ◽  
Anterior Half ◽  
The Family ◽  
History Of

1. Four remarkable new species of Caryophyllaeidae from the Anglo-Egyptian Sudan are described, three of which (from Siluroid fishes) are referred to a new genus, Wenyonia --W. virilis, W. acuminata, and W. minuta--and the fourth (from Mormyrus caschive) to the original genus Caryophyllaeus--C. filiformis. The chief characteristics of the new genus are the situation of the sexual apertures in the anterior half of the body, and the elongated uterus. The family Caryophyllaeidae, after deletion of the genera Diporus, Monobothriuin, and Glaridacris, thus contains three genera--Caryophyllaeus, Archigetes, and Wenyonia--all of which are re-defined, with their known species. 2. Very young immature forms of Wenyonia occur in the same (Siluroid) host as the adult and are devoid of a ‘caudal’ appendage, whence it would appear that the life-history of these new forms is different from that of C. laticeps. 3. The three families of the Cestodaria--Caryophyllaeidae, Gyrocotylidae, and Amphilinidae--are re-defined. 4. The Cestodaria, after eliminating Sanguinicola (a Trematode ?), are provisionally grouped into two Orders: the Amphilinidea (with one family, the Amphilinidae) and the Paralinidea (with two families, the Caryophyllaeidae and the Gyrocotylidae), the latter being closely allied to the Bothriocephalidae. These two Orders are defined.

Sign in / Sign up

Export Citation Format

Share Document