Additional information on Alainaspis and Boothiaspis, cyathaspidids (Agnatha: Heterostraci) from the Upper Silurian of Northwest Territories, Canada

1991 ◽  
Vol 65 (2) ◽  
pp. 308-313 ◽  
Author(s):  
David K. Elliott ◽  
David L. Dineley
Keyword(s):  
Northwest Territories ◽  
Related Species ◽  
Posterior Margin ◽  
Dorsal Shield ◽  
Filter Feeder ◽  
Closely Related Species ◽  
Additional Information ◽  
New Material ◽  
Upper Silurian ◽  
Original Interpretation

New material of the poraspid Alainaspis platyrhina Elliott and Dineley has made it possible to provide a more extensive reconstruction of this animal. It is now clear that an elongated branchial opening was present below the lateral lamina and that a well-developed post-branchial lobe was present. No branchial plate has been identified and this may have been fused to the dorsal shield, forming the ventral lamina. The lateral lamina is now seen to terminate in a rounded angle before the posterior margin of the shield. Several ventral shields with similar ornament are identified as belonging to A. platyrhina. These are broad and deep and are consistent with the original interpretation of this animal as a filter feeder. One similar shield with a coarser ornament is tentatively assigned to the closely related species Boothiaspis ovata Broad.

scholarly journals An evaluation of the systematics of the genus Thalia (Thaliacea, Salpidae) based on new material from the EASTROPAC and MORO expeditions

1996 ◽  
Vol 66 (3) ◽  
pp. 185-191
Author(s):  
María C. Daponte ◽  
Roberto J. Castro ◽  
Graciela B. Esnal
Keyword(s):  
Related Species ◽  
Great Variability ◽  
Closely Related Species ◽  
Sympatric Distribution ◽  
New Material

Until 1973, when Van Soest revised Thalia Blumenbach, 1798, this genus comprised only two species: Thalia democratica (Forsskål, 1775) and Thalia longicauda (Quoy & Gaimard, 1824). The former showed great variability, which led Van Soest to distinguish five species: T. democratica, T. orientalis, T. rhomboides, T. cicar, and T. sibogae. Some authors have ignored this revision considering the observed differences of infraspecific level. In the present work new material is studied analysing variables not previously considered, such as the development of blastogenic stolons in the solitary zooids and the location of the tunnel opening through which the bud blocks are liberated. These characters previously permitted a separation of closely related species in the genus Ihlea. The results show that stolon features, even though they permit a separation of solitary zooids of Thalia longicauda, do not discriminate all species of the “T. democratica group” since they are only useful in distinguishing T. democratica from T. sibogae. Other variables, mainly qualitative, do permit differentiation. The sympatric distribution of these taxa supports Van Soest’s hypothesis as well.

Two new species of Paractinolaimus Meyl, 1957 (Nematoda: Paractinolaimidae) from the Mackenzie and Porcupine river systems, Northwest Territories, Canada

1982 ◽  
Vol 60 (2) ◽  
pp. 158-164 ◽  
Author(s):  
Eldon S. Eveleigh
Keyword(s):  
New Species ◽  
Northwest Territories ◽  
Related Species ◽  
Aquatic Habitats ◽  
River Systems ◽  
Closely Related Species ◽  
Male Tail ◽  
Spicule Length ◽  
Two New Species

Two new species of dorylaim nematodes, Paractinolaimus spanithelus n. sp. and Paractinolaimus longidrilus n. sp., from aquatic habitats are described and illustrated. The main differential characteristics of P. spanithelus are the small number of widely spaced supplements (12), length of sperms (9–10 μm), bluntly rounded convex–conoid shape of the male tail, and the number of pairs of caudal papillae in both sexes. Paractinolaimus longidrilus is distinguishable from closely related species by the spicule length (83 μm), the heavily cuticularized lateral guiding pieces that are broadly rounded distally, the number of pairs of caudal papillae (11) in the male, and the number of submedian ventral papillae (13) in the male.

scholarly journals New Scymnus (Pullus)-species (Coleoptera, Coccinellidae) from Uganda

1998 ◽  
Vol 9 (2) ◽  
pp. 85-94
Author(s):  
Helmut Fürsch
Keyword(s):  
New Species ◽  
Related Species ◽  
Closely Related Species ◽  
New Synonyms ◽  
Kibale Forest ◽  
New Material ◽  
Three New Species

Three new species of Ugandan Kibale forest are described, figured and compared with closely related species: Scymnus (Pullus) auritoides sp. n., S. (Pullus) fumosipennis sp. n. and S. (Pullus) siphonofissus sp. n. S. (Pullus) nigropectus Mader is redescribed, based on new material. New synonyms: S. mundus Mader is a younger synonym of S. nigrosellatus Mader and S. couturieri Chazeau is a synonym of S. majeri Fürsch.

Bicinctus-Group of the Genus Cricotopus Van der Wulp (Diptera: Chironomidae) in the Nearctic with a Description of a New Species

1977 ◽  
Vol 34 (1) ◽  
pp. 98-104 ◽  
Author(s):  
D. R. Oliver
Keyword(s):  
New Species ◽  
Northwest Territories ◽  
Related Species ◽  
Closely Related Species ◽  
A New Species

Three species, Cricotopus bicinctus (Meigen), C. vierriensis Goetghebuer, and C. mackenziensis n.sp., in the bicinctus-group of the genus Cricotopus Van der Wulp are now known to occur in the Nearctic. The new species is described from the Fort Simpson area, Northwest Territories, and compared with a closely related species, Cricotopus (s.s.) bicinctus. Most of the differences between the two species are related to the smaller size of C. mackenziensis.

scholarly journals Tipula (Vestiplex) butvilai sp. nov., a new crane fly (Diptera, Tipulidae) from Yunnan, China

ZooKeys ◽  
2019 ◽  
Vol 869 ◽  
pp. 91-101
Author(s):  
Pavel Starkevich ◽  
Aidas Saldaitis ◽  
Qiu-Lei Men
Keyword(s):  
New Species ◽  
Related Species ◽  
Yunnan Province ◽  
Species Group ◽  
Closely Related Species ◽  
New Material

A new crane fly, Tipula (Vestiplex) butvilaisp. nov., is described and illustrated based on new material collected in the Nu Jiang Valley of Yunnan Province, China. The hypopygium for the most closely related species, Tipula (Vestiplex) testata Alexander, 1935, is also illustrated. A key is provided to distinguish males of the new species from those of other species in the T. (V.) bicornigera Alexander, 1938 species group.

Postovipositional maternal care in the burrower bug, Adomerus rotundus (Hemiptera: Cydnidae)

2014 ◽  
Vol 146 (2) ◽  
pp. 211-218 ◽  
Author(s):  
Kouichi Inadomi ◽  
Maiko Wakiyama ◽  
Mantaro Hironaka ◽  
Hiromi Mukai ◽  
Lisa Filippi ◽  
...  
Keyword(s):  
Related Species ◽  
Maternal Care ◽  
Egg Production ◽  
Common Ancestor ◽  
Japanese Species ◽  
Closely Related Species ◽  
Egg Hatch ◽  
Additional Information ◽  
The Third ◽  
The Common

AbstractComplex subsociality involving guarding, progressive provisioning, and trophic egg production behaviours in herbivorous Hemiptera is known in only a few genera in the Cydnidae subfamily Sehirinae and in Parastrachiidae. Because progressive provisioning and trophic egg production are apparently specific to these closely related species, phylogenetically it seems likely that the behaviours emerged once in the common ancestor of this clade. However, the scarcity of information on species in the clade precludes any reliable exploration of this hypothesis. To ameliorate this situation, it is necessary to accumulate additional information for as many related species as possible. To this end, we first targeted Japanese representatives of the genus Adomerus Mulsant and Rey (Hemiptera: Cydnidae), three species of which are distributed in Japan. Complex subsocial behaviours in two of these species, Adomerus triguttulus (Motschulsky) and Adomerus variegatus (Signoret), have been well characterised and analysed. The third Japanese species, Adomerus rotundus (Hsiao), was identified to display complex maternal care, but, with the exception of egg hatch synchronisation, parental behaviours have not been characterised. In this study, we examined the parental behaviours of A. rotundus. Additional investigations on subsocial behaviours, in addition to morphological and molecular analyses, should gradually clarify whether the complex subsociality represents a homologous or convergent adaptation.

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