摘要:

The Bornean species of the perlid genusNeoperlaare described. The fauna includes representatives of theclymene‐ andmontivaga‐groups. Several species-complexes within these groups are distinguished. Redescriptions of previously named species are based on a study of type material, except forN. variegata. Lectotypes are designated for several species. A number of species known only from females cannot presently be assigned to named species and are given provisional informal letter designations. Named species recognized in this study are:N. rougemontisp. n.;N.sabahsp. n.;N. theobromaesp. n.;N. parvaBanks, 1939;N. edmundsiStark, 1983;N. starkisp. n.;N. Sarawaksp.n.;N. borneensis(Enderlein,1909) comb, n.;N. naviculataKlapalek, 1909;N. naviculata cruxssp. n.;N. harina Navás, 1929;N. furciferaKlapálek, 1909;N. bilobatasp. n.;N.furcatasp. n.;N. tetrapodasp. n.;N. securiferasp. n.;N. multilobatasp. n.;N. connectenssp. n.;N. divergenssp. n.;N. variegataKlapálek, 1909 (=N. lebanginaNavás, 1929, s y n . n o v.; =N. centralisBanks, 1939, s y n. n o v.);N. silvaeaesp. n.;N. alboguttatasp. n.;N. unicolorsp. n.;N. dayaksp. n.;N. reticutalasp. n.;N. paucispinosasp. n.;N. seriespinosasp. n.;N. spinosasp. nmlçN. bicoronata sp. n.;N. punansp. n.;N. nanginaNavás, 1929 is a new synonym ofEtrocorema nigrogeniculatum(Enderlein, 1909).N. hageniBanks, 1920 andN. pumilioKlapálek, 1921 had previously been transferred to the genusPhanoperla.

ISSN:0165-0424    

DOI:10.1080/01650428609361227

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

CaenisrhenicolaMalzacher 1976 is shown to be a new synonym ofCaenispusilla Navás 1913. A description of the diagnostic features is given as well as new records'from the Mediterranean region.

ISSN:0165-0424    

DOI:10.1080/01650428609361228

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Net‐spinning larvae of the hydropsychidAmphipsyche senegalensisBrauer are commonly found on submerged trees in exposed regions of Lake Kariba as well as in nearby rivers. Final instar larvae were removed from the lake, placed into a laboratory stream channel and the nets compared with those spun by larvae in Kariba. No significant differences were found in mean mesh size between nets from the channel (44 × 34 μm) and those from the lake (48 × 40 μm). The width of the silk strands used in net building varied from 1.5–3.2 μm, but strand width differences between nets from the two habitats were not statistically significant. However, nets spun byA. senegalensislarvae in nearby rivers were in marked contrast to those built by larvae from Kariba. A final instar net had a mean mesh size of 77 × 67 μm and a mean silk strand diameter of 7.1 μm, while a net from a younger instar measured 54 × 47 μm with a mean silk strand width of 3.6 μm, indicating that flow regime may play a part in influencing net construction. Data for allA. senegalensisnets examined showed a positive correlation between mesh size and silk strand diameter (P < 0.001). It is suggested that the apparent flexibility in net‐spinning behaviour may assist in adapting larvae to the fluctuating flow conditions often associated with lotic habitats.

ISSN:0165-0424    

DOI:10.1080/01650428609361229

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

ISSN:0165-0424    

DOI:10.1080/01650428609361230

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

ISSN:0165-0424    

DOI:10.1080/01650428609361226

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor