Hermesorchestia alastairi gen. et sp. nov. from Australia (Talitridae: Senticaudata: Amphipoda: Crustacea)

Zootaxa ◽  
2017 ◽  
Vol 4311 (4) ◽  
pp. 491
Author(s):  
LAUREN ELIZABETH HUGHES ◽  
JAMES KENNETH LOWRY
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Sand Dunes ◽  
Three Dimensional ◽  
High Water ◽  
Sexually Dimorphic ◽  
High Water Mark ◽  
One New Species

The new talitrid amphipod genus Hermesorchestia is established for one new species from Australia, H. alastairi, common to the beaches of Tasmania. Hermesorchestia gen. nov. is typified by the sexually dimorphic males which have palmate lobes on the carpus and propodus of gnathopod 1, a three dimensional merus article on pereopod 7 and expanded posterior margin of pereopod 7 carpus. Other characters which define H. alastairi gen. et sp. nov. are the male pereopod 6 expanded merus and carpus, pereopod 7 basis posterior expansion, merus shape both medial and facial, carpus posterior expansion and the shape and setation of the telson. Hermesorchestia alastairi gen. et sp. nov. is a documented burrower (sand-hopper), living in sand dunes above the high water mark. 

IV.—Notes On Some Coastal Features in Co. Waterford

1907 ◽  
Vol 4 (11) ◽  
pp. 501-506
Author(s):  
F. R. Cowper Reed
Keyword(s):  
Solid Rock ◽  
Sand Dunes ◽  
High Water ◽  
The North ◽  
North Side ◽  
High Water Mark ◽  
Slight Rise ◽  
Coastal Features ◽  
Sea Cliff ◽  
Previous Occasion

On previous occasion (Geol. Mag., Dec. V, Vol. IV, 1907, pp. 17–20) an account was given by the author of lornagnt Strand in the estuary of the River Suir; and the nature anddevelopment of the drift deposits further up the river may now be described.On the north side of Knockavelish Head (which bounds Fornaght Strand on the north), the coastfrom Ballyglan is bordered by low sand dunes for a distance of about a mile and a half, and thereis no cliff or exposure of any solid rock, the old sea margin being apparently situated now some way inland behind an area of more or less marshy laud at the back of the dunes. Traces of the former sea-cliff can, however, be recognised here and there by a sudden slight rise in the ground. A wide flat expanse of sand and mud, known as Woodstown Strand, is uncovered at low tide along this stretch of coast, extending out fully a mile from high-water mark, but so far no trace of the submerged forest of Fornaght has been here discovered.

Two species of Talitridae (Crustacea, Amphipoda) from Kenya

Zootaxa ◽  
2021 ◽  
Vol 4927 (3) ◽  
pp. 331-358
Author(s):  
JOSHUA SESE BICHANG’A ◽  
ESTHER N. KIOKO ◽  
HONGGUANG LIU ◽  
SHUQIANG LI ◽  
ZHONGE HOU
Keyword(s):  
New Species ◽  
Morphological Characteristics ◽  
Molecular Evidence ◽  
Sexually Dimorphic ◽  
Ventral Margin ◽  
Closely Related Species ◽  
The Family ◽  
Left Mandible ◽  
National Museums ◽  
One New Species

Two species of the family Talitridae Rafinesque, 1815 are described from English Point Beach, Mkomani, Mombasa, Kenya. One new species Floresorchestia mkomani Bichang’a & Hou, sp. nov. is reported and Gazia gazi Lowry & Springthorpe, 2019 is redescribed. The new species is characterized by the five dentate lacinia mobilis on the left mandible in male and only four in female, pereopod IV dactylus thickened proximally and having a small protrusion towards the mid of its posterior margin, a sexually dimorphic pereopod VII, and the presence of vertical slits just above the ventral margin of epimera II and III. Detailed morphological characteristics, as well as comparisons with closely related species are provided. To ascertain the species delimitation, molecular evidence is availed in this paper. Type material is deposited in National Museums of Kenya (NMK). 

Trilobites from the Upper Ordovician Tangtou Formation, Jiangsu Province, China

1989 ◽  
Vol 80 (1) ◽  
pp. 25-68 ◽  
Author(s):  
Ronald P. Tripp ◽  
Zhiyi Zhou ◽  
Zhenqin Pan
Keyword(s):  
New Species ◽  
Central Asia ◽  
Posterior Margin ◽  
Type Species ◽  
Jiangsu Province ◽  
The Other ◽  
Upper Ordovician ◽  
Long Duration ◽  
One New Species ◽  
Se China

ABSTRACTForty-one species assigned to thirty-seven named genera of trilobites are described from the Tangtou Formation at Tangshan and Lunshan, in Jiangsu Province, SE China. Nankinolithus nankinensis Lu, the Zone fossil of the upper part of the Formation, is abundant. Many Tangtou Formation species occur also in the Huangnehkan, Linhsiang and Chiencaokou formations, and all are considered to be of early Ashgill age. The trilobites are closely related to those of the Staurocephalus clavifrons Zone (Rawtheyan) of Poland, demonstrating the long duration and wide extent of deeper water faunas. There are also close links with the Ashgill faunas of Central Asia.One new species, Amphitryon cheni, is established. The following morphological features are described: a small remopleuridine hypostome is unlike any other in construction; Nileus transversus retains genal spines to full grown size in some specimens, but loses them in others; the hypostome lacks the posteromedian cusp of other species. The hypostome of Paraphillipsinella is strongly styginid in conformation, and unlike that of Phillipsinella. Telephina convexa is the only species known with three spines on the librigena. The arrangement of pits in Nankinolithus nankinensis, the type species, is described, including illustrations of the irregularities which occur in every fringe. A small bulb at the tip of the hypostome of Ovalocephalus (= Hammatocnemis) bears two backwardly pointing spinules, one above the other, on the vertical posterior margin. Three types of protaspides, and numerous meraspid parts are described.

One new species of the genus Xizicus (Orthoptera: Tettigoniidae: Meconematinae) from Chongqing, China

Zootaxa ◽  
2017 ◽  
Vol 4286 (4) ◽  
pp. 593
Author(s):  
HAI-JIAN WANG ◽  
FU-MING SHI
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Abdominal Tergite ◽  
Ventral Surface ◽  
The Other ◽  
Base Area ◽  
Subgenital Plate ◽  
One New Species

The paper described one new species from Chongqing, China, i.e. Xizicus (Eoxizicus) simianshanensis sp. nov., it resembles Xizicus (Eoxizicus) divergentis (Liu & Zhang, 2000) and Xizicus (Eoxizicus) xiai (Liu & Zhang, 2000), but differs from the latter in: posterior processes of male tenth abdominal tergite straight; inner margin of base area of cerci with a notch, the other area of ventral surface after it enlarged inwards, with distinct edge; subgenital plate with posterior margin narrow, with styli stout and short. 

Further Notes on the Genus Evylaeus Robertson (Hymenoptera: Halictidae)

1964 ◽  
Vol 96 (7) ◽  
pp. 957-962 ◽  
Author(s):  
G. Knerer ◽  
C. E. Atwood
Keyword(s):  
New Species ◽  
Related Species ◽  
Sexually Dimorphic ◽  
Northern Ontario ◽  
Closely Related Species ◽  
The Many ◽  
Dimorphic Species ◽  
One New Species ◽  
Social Level

AbstractMining bees of the genus Evylaeus are remarkable in that their behaviour ranges from a strictly solitary to a complex social level. Knowledge of the many sexually dimorphic species is fragmentary, and the present paper describes one new species from northern Ontario and associates the sexes in two others. Biological notes and the illustration of male terminalia of closely related species are presented to facilitate their separation.

Anophtalmic and epigean? Description of an intriguing new species of Hyalella (Amphipoda, Hyalellidae) from Brazil

Zootaxa ◽  
2018 ◽  
Vol 4407 (2) ◽  
pp. 254 ◽  
Author(s):  
RAFAELA BASTOS-PEREIRA ◽  
MARCUS PAULO ALVES DE OLIVEIRA ◽  
RODRIGO L. FERREIRA
Keyword(s):  
New Species ◽  
Water Flow ◽  
Posterior Margin ◽  
High Water ◽  
Minas Gerais ◽  
Predation Avoidance ◽  
Iron Quadrangle ◽  
Different Types ◽  
Subterranean Environment

The absence of eyes in Hyalella (Hyalellidae, Amphipoda) is typical of obligate groundwater-dwelling species. However, a new intriguing blind amphipod of this genus was found in epigean streams from the Iron Quadrangle (state of Minas Gerais, Brazil). Hyalella troglofugia sp nov. presents antenna 1 shorter than antenna 2, gnathopod 1 propodus inner face with four setae, gnathopod 2 propodus posterior margin longer than palm, dactylus slightly longer than palm, pereopod 5 shorter than others and uropod 3 shorter than telson. The absence of eyes and presence of reduced U3 and pereopods of H. troglofugia sp nov. may suggest that such species also inhabits interstitial subterranean spaces. Moreover, the presence of the new species on streams associated to distinct hydrological zones indicates that this species may be present in different types of subterranean habitats of the region. We hypothesize that at least part of the population of this species may have left the subterranean environment looking for food and when out of this habitat it preferentially inhabits high water flow stretches of the stream in function of predation avoidance. 

The ultrastructure of the abdominal musculature of an orchestid amphipod

1990 ◽  
Vol 48 (3) ◽  
pp. 464-465
Author(s):  
Martin A. Levin ◽  
Lisa L. Cale ◽  
Valerie Lynch-Holm
Keyword(s):  
Intertidal Zone ◽  
High Water ◽  
Abdominal Muscles ◽  
Abdominal Musculature ◽  
Dorsal Muscle ◽  
High Water Mark ◽  
Thoracic Legs ◽  
Orchestia Cavimana

Orchestia is a genus of amphipod in the crustacean class Malacostraca. The order Amphipoda contains over 6000 species commonly called side swimmers, scuds and beach fleas(1). Most are marine bottom-dwellers utilizing their thoracic legs and posterior abdominal uropods for walking, crawling and swimming. However, some, like those in the genera Orchestia and Hyale are semiterrestrial. These amphipods, commonly referred to as “beach fleas,' “beach hoppers” or “sand fleas” can hop vigorously for great distances (up to 50 times their length) by extending their abdomens and telsons against the sand(2).In our study, the ultrastructure of the dorsal muscle cord of Orchestia grillus was examined. Vogel(3) described the abdominal muscles of Orchestia cavimana as consisting of two groups of muscles: a strong, complex, dorsal muscle cord used mainly for hopping and a group of weaker, ventral, longitudinal and oblique muscles.The specimens were collected in clumps of decaying seaweed and other detritus from the intertidal zone near the high water mark at Avery Point Beach, Connecticut.

Diatoms of the genus Navicula of Lake Teletskoye (Altai) and some rivers of its basin

2019 ◽  
Vol 53 (2) ◽  
pp. 255-278
Author(s):  
D. A. Chudaev
Keyword(s):  
New Species ◽  
Diatom Species ◽  
Lake Teletskoye ◽  
First Time ◽  
One New Species

As a result of study of 18 samples, collected in Lake Teletskoye and inflowing rivers in 1992–1995, 34 diatom species of the genus Navicula Bory were found. Among them 21 taxa are new for the studied region, 7 species (Navicula arkona, N. hangaica, N. cf. pseudoreinhardtii, N. ricardae, N. scaniae, N. schweigeri, N. suecicarum) are recorded for the first time in Russia. One new species (N. pseudoharmoniae sp. nov.) is described. It is compared with N. harmoniae and N. digitoconvergens.

The cricket genus Abaxitrella (Orthoptera: Gryllidae: Podoscirtinae) in China, with description of one new species

2015 ◽  
Vol 24 (1) ◽  
pp. 85-89
Author(s):  
Libin Ma ◽  
A.V. Gorochov
Keyword(s):  
New Species ◽  
Chinese Province ◽  
First Time ◽  
One New Species

The genus Abaxitrella Gorochov, 2002 is recorded from China for the first time. Abaxitrella uncinata sp. nov. is discovered in the Chinese province Fujian; its description and illustrations as well as a key to Abaxitrella species are given.

Sign in / Sign up

Export Citation Format

Share Document