EXPANDING THE RECORD OF LARVAE OF FALSE FLOWER BEETLES WITH PROMINENT TERMINAL ENDS

Beetle larvae contribute to the overall biomass with a great share, yet they often stay unnoticed and underexplored. Larvae of the group Scraptiidae, also called false flower beetles, lead a life hidden in the wood, not easily accessible for observers. There, they contribute to wood decomposition and carbon cycling. Even though their ecological role is of great importance, these larvae have been comparably rarely studied. This is true for extant as well as fossil representatives of this group. It seems that this knowledge gap is not based on the limited availability of material but results from insufficiently studied material. Here we report new specimens, of which seven are extant and twelve are fossil. Fossil specimens are either from 40-million-year-old Baltic amber (Eocene) or 100-million-year-old Myanmar amber (Cretaceous), the latter representing the oldest record of these larvae. All specimens considered here possess a large, elongated terminal end. We performed an outline analysis of the shape of this terminal end for all so far known larval specimens sufficiently well preserved (in total 33 specimens: 17 extant, 14 Eocene, 2 Cretaceous). There is a recognisable difference between Eocene and extant specimens, yet it remains unclear whether this is due to different represented larval stages or an effect of evolution.

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First report of inventory and role of macroinvertebrates and fish in Cautín river (38° S, Araucania region Chile)

Brazilian Journal of Biology ◽

10.1590/1519-6984.203511 ◽

2020 ◽

Vol 80 (1) ◽

pp. 215-228 ◽

Cited By ~ 2

Author(s):

R. Vega ◽

P. De los Ríos ◽

F. Encina ◽

J. A. Norambuena ◽

J. Barile ◽

...

Keyword(s):

Ecological Role ◽

Snow Melting ◽

Introduced Fish ◽

Human Interference ◽

Inland Water ◽

Larval Stages ◽

Freshwater Crabs ◽

Mixed Regime ◽

Native Fishes

Abstract The Cautin river is located in the 137 years old Araucania region, Chile (38°S), and is characterized by alterations through human interference due agriculture and towns in its surrounding basin, the presence of salmonids, and by its mixed regime, originated from snow melting in summer and rains in winter. The aim of the present study was to make a review of the inventory and ecological role of the benthic inland water macroinvertebrates of the River Cautin, in order to understand their importance in the ecosystem of the river. The fauna of this river includes a fauna composed of endemic and introduced fish, which has, however, been only poorly studied until now. The literature revealed the presence of abundant populations of Diptera, Trichoptera and Ephemeroptera larval stages, and few crustaceans specifically amphipods and freshwater crabs along the river’s course. Many of these macroinvertebrates are prey for both introduced salmonids and native fishes. Similar results have been reported for other southern Argentinean and Chilean Patagonian rivers.

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Taxonomical and functional diversity of Saprolegniales in Anzali lagoon, Iran

10.1101/860429 ◽

2019 ◽

Author(s):

Hossein Masigol ◽

Seyed Akbar Khodaparast ◽

Reza Mostowfizadeh-Ghalamfarsa ◽

Keilor Rojas-Jimenez ◽

Jason Nicholas Woodhouse ◽

...

Keyword(s):

Carbon Cycling ◽

Functional Diversity ◽

Aquatic Ecosystems ◽

Ecological Niche ◽

Freshwater Ecosystems ◽

Ecological Role ◽

Assay Methods ◽

Gilan Province ◽

Anzali Lagoon

AbstractStudies on the diversity, distribution and ecological role of Saprolegniales (Oomycota) in freshwater ecosystems are currently receiving attention due to a greater understanding of their role in carbon cycling in various aquatic ecosystems. In this study, we characterized several Saprolegniales species isolated from Anzali lagoon, Gilan province, Iran, using morphological and molecular methods. Four species of Saprolegnia were identified, including S. anisospora and S. diclina as first reports for Iran. Evaluation of the ligno-, cellulo- and chitinolytic activities were also measured using plate assay methods. Most of the Saprolegniales isolates were obtained in autumn and nearly 50% of the strains showed chitinolytic and cellulolytic activities. However, only a few Saprolegniales strains showed lignolytic activities. This study has important implications for better understanding the ecological niche of oomycetes, and to differentiate them from morphologically similar but functional different aquatic fungi in freshwater ecosystems.

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A scanning electron microscopic study of the veliger larvae of the scallop argopecten purpuratus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100103486 ◽

1988 ◽

Vol 46 ◽

pp. 284-285

Author(s):

G.C. Bellolio ◽

K.S. Lohrmann ◽

E.M. Dupré

Keyword(s):

Morphological Description ◽

Electron Microscopic ◽

Larval Stages ◽

Scanning Electron Microscopic Study ◽

The Pacific ◽

Argopecten Purpuratus ◽

Veliger Larvae ◽

20 Nm ◽

Ethanol Series ◽

Scanning Electron

Argopecten purpuratus is a scallop distributed in the Pacific coast of Chile and Peru. Although this species is mass cultured in both countries there is no morphological description available of the development of this bivalve except for few characterizations of some larval stages described for culture purposes. In this work veliger larvae (app. 140 pm length) were examined by the scanning electron microscope (SEM) in order to study some aspects of the organogenesis of this species.Veliger larvae were obtained from hatchery cultures, relaxed with a solution of MgCl2 and killed by slow addition of 21 glutaraldehyde (GA) in seawater (SW). They were fixed in 2% GA in calcium free artificial SW (pH 8.3), rinsed 3 times in calcium free SW, and dehydrated in a graded ethanol series. The larvae were critical point dried and mounted on double scotch tape (DST). To permit internal view, some valves were removed by slightly pressing and lifting the tip of a cactus spine wrapped with DST, The samples were coated with 20 nm gold and examined with a JEOL JSM T-300 operated at 15 KV.

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Sharing Expository Texts with Preschool Children in Special Education

Perspectives on Language Learning and Education ◽

10.1044/lle22.3.93 ◽

2015 ◽

Vol 22 (3) ◽

pp. 93-102 ◽

Cited By ~ 2

Author(s):

Allison Breit-Smith ◽

Jamie Busch ◽

Ying Guo

Keyword(s):

Special Education ◽

Preschool Children ◽

Language Impairment ◽

Listening Comprehension ◽

Expository Texts ◽

Speech Language Pathologists ◽

Narrative Texts ◽

Preschool Special Education ◽

Limited Availability

Although a general limited availability of expository texts currently exists in preschool special education classrooms, expository texts offer speech-language pathologists (SLPs) a rich context for addressing the language goals of preschool children with language impairment on their caseloads. Thus, this article highlights the differences between expository and narrative texts and describes how SLPs might use expository texts for targeting preschool children's goals related to listening comprehension, vocabulary, and syntactic relationships.

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