Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri

Zootaxa ◽  
2018 ◽  
Vol 4399 (4) ◽  
pp. 491 ◽  
Author(s):  
JAMES W. JR. FETZNER ◽  
CHRISTOPHER A. TAYLOR
Keyword(s):  
New Species ◽  
Fourth Order ◽  
River System ◽  
Dorsal Side ◽  
The Other ◽  
Freshwater Crayfish ◽  
Undescribed Species ◽  
River Systems ◽  
Ozark Highlands ◽  
Two New Species

Two new species of freshwater crayfish are described from the Ozarks Plateau of northern Arkansas and southern Missouri. Both species are restricted to the mainstem of rocky streams that are at least fourth-order or greater in size. Recent genetic and morphological investigations of the coldwater crayfish, Faxonius eupunctus Williams, 1952, indicated that it was actually composed of several undescribed species. Faxonius eupunctus is herein restricted to just the Eleven Point River system. Faxonius roberti, new species is found in the mainstem of the Spring and Strawberry river systems in northern Arkansas. It differs from F. eupunctus by lacking a male Form-I gonopod with a distal spatulate mesial process, and presence of two spines on the dorsal side of the merus, where F. eupunctus typically has 1 spine. Faxonius wagneri, new species is known from a 54 mile (86 km) stretch of the Eleven Point River mainstem, ranging from just southeast of Greer, Missouri to just north of Birdell, Arkansas. Faxonius wagneri can be differentiated from both F. eupunctus and Faxonius roberti sp. nov. by using the male Form-I and Form-II gonopods, the shape of the chelae, and the female annulus ventralis. In F. wagneri, the terminal elements of the first pleopod are almost twice as long as those in F. eupunctus and F. roberti, with the tips of the appendage reaching the posterior base of the first perieopod when the abdomen is flexed forward, whereas, in the other two species, these elements only reach the base of the second pereiopod. The species also possesses two spines on the dorsal side of the merus of the first pereiopod, which helps distinguish it from F. eupunctus. 

Two new Tytthoscincus Linkem, Diesmos, & Brown (Squamata; Scincidae) from Peninsular Malaysia and another case of microsyntopy between ecologically specialized, unrelated, leaf-litter species

Zootaxa ◽  
2018 ◽  
Vol 4425 (1) ◽  
pp. 87
Author(s):  
L. LEE GRISMER ◽  
PERRY L. JR. WOOD ◽  
AMIRRUDIN B. AHMAD ◽  
B. S. BAIZUL-HAFSYAM ◽  
M. AFIQ-SHUHAIMI ◽  
...  
Keyword(s):  
New Species ◽  
Leaf Litter ◽  
Endemic Species ◽  
Peninsular Malaysia ◽  
The Other ◽  
Morphological Data ◽  
Undescribed Species ◽  
Two New Species ◽  
Growing Body ◽  
Riparian Systems

Two new species of diminutive, sympatric, lowland, leaf-litter skinks of the genus Tytthoscincus Linkem, Diesmos & Brown from the Sekayu region of Hulu Terengganu, Terengganu State in northeastern Peninsular Malaysia are described on the basis genetic and morphological data. One of the new species, T. monticolus sp. nov., was collected in a hilly riparian area along Sungai (=river) Bubu and is most closely related to an undescribed species from the Tembak Reservoir area. The other, T. keciktuek sp. nov. collected along Sungai Peres, is most closely related to T. perhentianensis Grismer, Wood, & Grismer from Pulau (=island) Perhentian Besar. Sympatry and syntopy of multiple, specialized, unrelated, leaf-litter species of Tytthoscincus was previously only known from upland areas and these new species represent the first example of lowland of sympatry. More importantly, however, these endemic species add to a growing body of research and discoveries that continue to underscore the unrealized biodiversity of the riparian systems of Hulu Terengganu and the Sekayu region and their need for protection and continued study. 

scholarly journals Two new species of callanthiid fishes of the genus Grammatonotus (Percoidei: Callanthiidae) from Pohnpei, western Pacific

Zootaxa ◽  
2017 ◽  
Vol 4243 (1) ◽  
pp. 187 ◽  
Author(s):  
WILLIAM D., JR. ANDERSON ◽  
G. DAVID JOHNSON
Keyword(s):  
New Species ◽  
The Other ◽  
Western Pacific ◽  
Western Pacific Ocean ◽  
Undescribed Species ◽  
Bishop Museum ◽  
Caudal Fin ◽  
The Family ◽  
Two New Species ◽  
Caroline Islands

In late July/early August 2015, ichthyologists from the Bishop Museum collecting fishes off Pohnpei in the Caroline Islands group, western Pacific Ocean, obtained specimens of two undescribed species of Grammatonotus. One of the new species, G. xanthostigma, closely resembles the recently described G. brianne, differing most strikingly in the shape of the caudal fin. The other, G. pelipel, is distinctive in having the following combination of characters: disjunct lateral line, barred pattern of coloration (most distinctive in small individuals), and caudal fin truncate to slightly emarginate in small specimens, but with upper and lower lobes produced in largest example known. Herein we provide characters that distinguish callanthiids from other percoids and that distinguish Grammatonotus from Callanthias, the other genus in the family Callanthiidae, along with descriptions of the new species. 

scholarly journals Two new catfish species of typically Amazonian lineages in the Upper Rio Paraguay (Aspredinidae: Hoplomyzontinae and Trichomycteridae: Vandelliinae), with a biogeographic discussion

2021 ◽  
Vol 61 ◽  
pp. e20216147
Author(s):  
Fernando Cesar Paiva Dagosta ◽  
Mário César Cardoso De Pinna
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Alternative Explanation ◽  
The Other ◽  
River Systems ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Two New Species ◽  
Pectoral Spine ◽  
Pelvic Fin

Two new species of particular biogeographic significance are described from the upper rio Paraguay basin, one of the genus Paracanthopoma (Trichomycteridae, Vandelliinae) and the other of the genus Ernstichthys (Aspredinidae, Hoplomyzontinae). The two species occur sympatrically in the Rio Taquarizinho, tributary of the Rio Taquari, in the upper Paraguay system. Paracanthopoma saci is distinguished from its only congener, P. parva, by a spatulate caudal peduncle; a minuscule premaxillary dentition (reduced to three delicate teeth); the supraorbital latero-sensory canals opening as two separate s6 pores; the caudal fin slightly convex or truncate with round edges; the skull roof entirely open, unossified; the origins of dorsal and anal fins approximately at same vertical; and the pelvic fin with three rays. Ernstichthys taquari is diagnosed among congeners by the narrow bony shields on dorsal and ventral series, not overlapping or contacting each other; by the presence of seven or eight serrations on the posterior margin of the pectoral spine; and by the pectoral-fin spine only slightly larger than subsequent soft rays. Both Paracanthopoma and Ernstichthys were previously unknown outside of the Greater Amazonian river systems (Amazon, Orinoco, Essequibo and smaller surrounding drainages). Their presence restricted to the Rio Taquari is unexpected and suggests a peculiar biogeographical history. Ancestral geographic distributions were reconstructed using S-DIVA and BBM methods in RASP. A majority of resulting hypotheses support that the two species reached the Paraguay from the Amazon. The alternative explanation accounts for their presence in the Paraguay by vicariant events. In no case, their presence in the Paraguay is an ancestral distribution with subsequent Amazonian dispersal. Though unusual, this pattern is also seen in a few other fish taxa, showing that the Rio Taquari is biogeographically hybrid, combining elements from both the Paraguay and Amazon drainages.

Two new species of Terebrasabella (Annelida: Sabellidae: Sabellinae) from Australia

Zootaxa ◽  
2007 ◽  
Vol 1434 (1) ◽  
pp. 51 ◽  
Author(s):  
ANNA MURRAY ◽  
GREG W. ROUSE
Keyword(s):  
New Species ◽  
The Other ◽  
Barrier Reef ◽  
Lizard Island ◽  
Eastern Australia ◽  
Two New Species ◽  
Coral Rock

Two new species of Terebrasabella Fitzhugh & Rouse, 1999 are described from eastern Australia. Terebrasabella hutchingsae sp. nov., was found from preserved coral rock debris collected in 1977 on the outer Barrier Reef near Lizard Island, Queensland. Terebrasabella fitzhughi sp. nov., was found alive in burrows in and among spirorbin serpulid tubes on intertidal rocks in Tasmania in 1996. Both species were found in mucoid tubes, and brood their young in a manner similar to the only other described species of Terebrasabella, T. heterouncinata Fitzhugh & Rouse, 1999. Terebrasabella hutchingsae sp. nov., is exceptional as it possesses a type of thoracic neurochaetal uncinus different from the other two species, and which is similar to the notochaetal acicular “palmate hook” seen in Caobangia. Descriptions of both species are given, and the diagnosis for Terebrasabella is emended. Larval and chaetal morphology and relationships among of the three known Terebrasabella spp. are discussed.

TWO NEW SPECIES OF ORTHEZIA

1898 ◽  
Vol 30 (1) ◽  
pp. 12-14 ◽  
Author(s):  
J. D. Tinsley
Keyword(s):  
New Species ◽  
The Other ◽  
Lateral Margin ◽  
Two New Species ◽  
Marginal Plates ◽  
Lateral Plates

Orthezia cheilanthi, n. sp.—Adult ♀ Length, 3.5 mm. Width, 3-3.5 mm. Length + ovisac, 6-8 mm. Width of Ovisac 3-4 mm. Body above covered with whtie secretion, which forms lateral and sub. dorsal longitudinal keels. A well-defined subdorsal furrow between the keels and the lateral margin formed by 3 or more rows of paltes; these are smaller than the projecting marginal plates, which are flattened; caudal plate and the 3 or 4 plates on each side of it very little longer than the lateral plates. The structure of the secretion is compact; in most of the other species of Orthezia it is fluffy.

Two new species ofSyllis(Polychaeta: Syllidae) from South Africa, one of them viviparous, with remarks on larval development and vivipary

2014 ◽  
Vol 94 (4) ◽  
pp. 729-746 ◽  
Author(s):  
Carol Simon ◽  
Guillermo San Martín ◽  
Georgina Robinson
Keyword(s):  
South Africa ◽  
New Species ◽  
South African ◽  
The Other ◽  
Coralline Algae ◽  
Colour Pattern ◽  
The Family ◽  
Two New Species ◽  
Haliotis Midae ◽  
Characteristic Colour

Two new species of South African Syllidae of the genusSyllisLamarck, 1818 are described.Syllis unzimasp. nov. is characterized by having unidentate compound chaetae with long spines on margin, a characteristic colour pattern and its reproduction by vivipary. Vivipary is not common among the polychaetes, but most representatives occur in the family Syllidae Grube, 1850 (in five otherSyllisspecies, two species ofDentatisyllisPerkins, 1981 and two species ofParexogoneMesnil & Caullery, 1818).Syllis unzimasp. nov. differs from the other viviparous species in having large broods (>44 juveniles) which develop synchronously. Development of the juveniles is similar to that of free-spawningSyllisspecies, but the appearance of the first pair of eyespots and the differentiation of the pharynx and proventricle occur later inS. unzima.Syllis amicarmillarissp. nov., is characterized by having an elongated body with relatively short, fusiform dorsal cirri and the presence of one or two pseudosimple chaeta on midbody parapodia by loss of blade and enlargement of shaft.Syllis unzimasp. nov. was found in high densities on culturedHolothuria scabraJaeger, 1833 with single specimens found on a culturedCrassostrea gigasThunberg, 1793 and on coralline algae, respectively, whileS. amicarmillariswas found mainly in sediment outside an abalone farm and less frequently on culturedHaliotis midaeLinnaeus, 1758. We discuss the possible benefits of the association withH. scabratoS. unzimasp. nov.

Two new species of Ocyochterus (Heteroptera: Ochteridae) from Ecuador and Panama

Zootaxa ◽  
2021 ◽  
Vol 4958 (1) ◽  
pp. 34-44
Author(s):  
DAN A. POLHEMUS
Keyword(s):  
New Species ◽  
The Other ◽  
Distribution Map ◽  
Two New Species

Two new species of Ocyochterus are described, O. graziae from Ecuador, and O. gilloglyi from Panama, and compared to the other two Andean species previously known in the genus. Dorsal habitus and anterior head photos are provided for all described species of Ocyochterus, and photomicrographs are provided for the male genitalic structures of O. graziae and O. gilloglyi. A distribution map is provided for all species in the genus. 

Composition of the genus Loricella (Mollusca: Polyplacophora: Loricidae) and the description of two new species

Zootaxa ◽  
2021 ◽  
Vol 4981 (2) ◽  
pp. 275-300
Author(s):  
BORIS SIRENKO
Keyword(s):  
Electron Microscope ◽  
New Species ◽  
Scanning Electron Microscope ◽  
Central Area ◽  
Dorsal Side ◽  
Morphological Features ◽  
Related Genus ◽  
Mouth Region ◽  
Two New Species ◽  
Scanning Electron

The genus chiton Loricella is revised. It comprises nine species. Two of these species, L. neoguinensis n. sp. and L. solomonensis n. sp., are described as new. Based on the analysis of morphological features studied using a scanning electron microscope, a revised diagnosis of the genus is provided. The characters diagnostic for this that distinguish it from the related genus Squamophora are as follows: a tubular hollow inside the dorsal scales, bristles on the dorsal side of the girdle, a wide ventral mouth region, a narrow mantle fold covered with simple longitudinally ribbed scales, smooth ventral scales, pits arranged in longitudinal rows in the central area of the tegmentum, and a bicuspid head of the major lateral teeth of the radula. 

scholarly journals The identity of Pseudomystus moeschii (Boulenger, 1890), with the description of two new species of bagrid catfishes from Southeast Asia (Teleostei: Bagridae)

Zootaxa ◽  
2005 ◽  
Vol 851 (1) ◽  
pp. 1 ◽  
Author(s):  
HEOK HEE NG ◽  
KELVIN K.P. LIM
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Peninsular Malaysia ◽  
The Other ◽  
River Drainage ◽  
Posterior Process ◽  
Two New Species ◽  
The Way

The identity of the poorly known bagrid catfish Pseudomystus moeschii (Boulenger, 1890) is clarified and the species redescribed. Two new species of closely related bagrid catfishes are also described: Pseudomystus carnosus from the Way Seputih River drainage in the province of Lampung in the southern tip of Sumatra, and P. fumosus from the Pahang River drainage in eastern Peninsular Malaysia. Pseudomystus carnosus, P. fumosus and P. moeschii can be distinguished from congeners in having an enlarged posterior process of the post-temporal, presence of long hair-like epithelial projections on the skin and long tubular extensions of the sensory pores. Pseudomystus carnosus differs from the other two species in having a pointed (vs. rounded) tip of the nuchal shield, while P. fumosus differs from the other two species in having very well developed procurrent caudal rays which are sinuously curved along the anterior edges (vs. less developed procurrent caudal rays that slope evenly along the edges). A lectotype is designated for P. moeschii.

A new Species of Cicadulina, China (Homoptera, Jassidae) injurious to Maize in Tanganyika Territory

1936 ◽  
Vol 27 (2) ◽  
pp. 251-252 ◽  
Author(s):  
W. E. China
Keyword(s):  
New Species ◽  
Distinct Species ◽  
The Gambia ◽  
The Other ◽  
Colour Pattern ◽  
Streak Virus ◽  
Research Station ◽  
Two New Species ◽  
A New Species

The genus Cicadulina was established in 1926 (Bull. Ent. Res. 17, p. 43) to hold a new species, C. zeae, China, injurious to maize in Kenya Colony. Later (Bull. Ent. Res., 19, 1928, p. 66) it was shown that Balclutha mbila, Naude, recorded as transmitting the virus of streak disease of maize in Natal, also belonged to this genus, and two new species C. arachidis and C. similis were described from the Gambia, where they were reported as injurious to ground-nut and suspected of transmitting the virus of the rosette disease of that plant. Since that time Dr. H. H. Storey of the Amani Research Station has been investigating the possibility of transmission of the streak virus of maize by C. zeae. In attempting to breed strains capable of transmission of the disease certain crosses were made which showed conclusively that he was dealing with two distinct species. These species he was able to separate on the colour pattern of the abdomen. Dr. Storey has now sent to me material of both these species and a study of the genitalia corroborates his finding. One, of course, proved to be C. zeae, the other is new and I therefore propose to dedicate it to the discoverer.

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