wiggins g b (41 risultati)

Condizione: New.

Condizione: As New. Unread book in perfect condition.

Softcover. 1st edition. xi, [1], 203 p.; 20 cm. (Harper forum books ; RD103) VG in orig. peach wrapper, sl. stain on front edge. Unread copy.

Hardcover. pp. 94 with portrait frontis. & b/w. plates. Contents fine. boards are a little rubbed. Overall a vg. copy. 0.0.

Condizione: As New. Unread book in perfect condition.

Condizione: New.

Condizione: New.

Condizione: As New. Unread book in perfect condition.

Condizione: New.

Seven new species of Neophylax McLachlan are described as follows: N. etnieri, N. auris, N. securis, and N. acutus from Tennessee; N. toshioi from Virginia; N. Ottawa from Ontario; and N. smithi from Washington. Genitalic characters of males and females are illustrated for the new species. A revised generic description incorporating characters of the additional species is presented. Total number of species in the genus is now 29, distributed in eastern Asia and Japan as well as North America. New taxa: Neophylax etnieri n. sp., Neophylax securis n. sp., Neophylax acutus n. sp., Neophylax toshioi n. sp., Neophylax ottawa n. sp., Neophylax smithi n. sp. 12 pp., 7 figs, br. gr. 8.

Condizione: As New. Unread book in perfect condition.

Condizione: Very good. xi, 401, numerous line drawings. . HB. Orig. pictorial cloth. Spine faded. Vg. From the library of Prof. J. Green (1928-2016) with his name to half-title. First edition. [9780802053442].

Condizione: Very good. xi, 401, numerous line drawings. . HB. Orig. pictorial cloth, spine slightly faded. From the library of British entomologist Peter C. Barnard with his name to half-title. His review of this work published in the Entomologist's Gazette pasted to front endpaper, causing minor cockling. Vg. First edition. [9780802053442].

13 pp., gr. 8.

A description is given for the male, female, and larva of Farula praelonga sp. nov. and for the female and larva of Neothremma genella Denning. Farula praelonga sp. nov. is distinctive in having an exceptionally long internal branch of segment X. The female of Neothremma genella is the only female yet known in that genus to have greatly reduced ventrolateral lobes of sternum IX. Modifications are made to the keys previously published for adults of Farula and Neothremma to incorporate this new information. These two species occur together in abundance; they are univoltine and have emergence periods 6 months apart. New taxon: Farula praelonga n. sp. 6 pp., 3 figs, gr. 8.

New taxon: Molannodes itoae n. sp. 5 pp., 2 figs, gr. 8.

3 pp., 4.

9 pp., 5 figs, gr. 8.

12 pp., 3 figs, 4.

Based on the general premise that the genus represents an ecological, as well as a morphological type, a number of generalizations are developed concerning the use of food resources in fresh waters by Trichoptera and some other aquatic orders of the Nearctic fauna. There are more genera of the Nearctic order Trichoptera (144) than in the orders Ephemeroptera (59), Odonata (84), or Plecoptera (88). Trichoptera have a wide range of habitats and a broader range of trophic categories than any of these other wholly aquatic orders. This relatively high ecological diversity is attributed to the many uses of silk by trichopteran larvae. Genera of 3 families of filter-feeding Trichoptera show differences in distribution which are correlated with the type of food particle. Most of these genera are found in the eastern deciduous forest biome and all sizes of organic particles are filtered. In the western montane forest biome, generalist filter feeders are absent or underrepresented; predacious genera or those filtering very fine particles have been more successful. Possibly there are differences in the quality and quantity of fine particulate detritus between eastern and western forest which account for the above distributions. In the trichopteran family Limnephilidae, genera of the detritivorous shredders have exploited lotic, lentic, and even terrestrial habitats; grazer genera are mostly confined to cool lotic habitat. Grazers in other families of Trichoptera are also more diverse in upstream areas, and grazer genera are particularly well-represented in the western montane forest biome. In streams of the eastern deciduous forest biome, the relative proportions of feeding categories shown by trichopteran genera appear to agree with a general trophic model of benthic invertebrate communities in that dominance of shredder-collector genera in upstream sections gives way to grazer-collector dominance downstream. In western montane streams, trichopteran generic distributions conform to the model downstream, but show relatively more grazers than the model would predict for upstream areas. Periphyton growth, and thus food for grazers, may be more abundant in the western coniferous forest than in the shaded streams of the eastern deciduous forest. In general, an ecological analysis of Nearctic Trichoptera at the generic level appears to provide a reasonable indication of the energy resources available in aquatic habitats. 10 pp., 8 figs, 2 tabs, 4.

A survey of characters within the Limnephilidae was made to test the cladistic hypothesis underlying traditional classification placing Neophylacinae as a subfamily of the Limnephilidae. Characters emerged which support an alternative hypothesis of phylogeny and classification, linking the Neophylacinae with the Thremmatidae and with the Uenoidae. The Uenoidae as defined here contain two monophyletic groups: subfamily Uenoinae containing the four genera Uenoa, Sericostriata, Neothremma and Farula previously constituting Uenoidae (sensu Wiggins et al., 1985), and subfamily Thremmatinae consisting of Thremma, Neophylax and Oligophlebodes. The new classification is shown to have predictive value for behaviour and ecology of the taxa. 12 pp., 8 figs, gr. 8.

The habitat, life cycle, behaviour, and food of five species of caddisflies of the genus Neophylax (N. aniqua Ross, N. ornatus Banks, N. concinnus McLachlan, N. oligius Ross, and N. fuscus Banks) were compared, based on general surveys and biweekly to monthly samples from several stream systems in southern Ontario. Larvae of four of the species, N. aniqua, N. concinnus, N. oligius, and N. fuscus, occur sequentially from the headwaters downstream and grow from late autumn through spring, but differ slightly in temporal development; adults of these species emerge in September and October, after a summer prepupal diapause. Larvae of the fifth species, N. ornatus, grow in late summer and autumn; their habitat coincides with portions of the habitats of N. aniqua and N. concinnus in cool headwater sections of streams, but adults emerge in June following a winter diapause. These species also differ in duration of diapause, case construction, location of pupal cases, and oviposition. All species graze on algae and fine organic particles from exposed surfaces of rocks. The study demonstrates that the five species of Neophylax studied differ in larval habitat and in time of development in ways that tend to keep them separate in stream systems. Evolutionary implications are considered. 14 pp., 12 figs, 4.

New taxa: Lepnevaina signata n. gen., n. sp. 5 pp., 5 figs, gr. 8.

15 pp., 18 figs, stapled gr. 8.

Three new species are described in the caddisfly family Uenoidae: Neothremma prolata, from Hood River County, Oregon; Neothremma mucronata from Lassen County, California; and Farula constricta from Multnomah County, Oregon. Following examination of the holotypes of several species, misinterpretation of the male genitalia morphology of Farula wigginsi Denning is corrected, leading to the recognition of that name as a junior synonym of F. petersoni Denning. Interpretation of male genitalic morphology in the original description of F. geyseri Denning is revised. Phylogenetic relationships are inferred from male genitalic morphology for the species of Neothremma and Farula. Biogeographic patterns of the species in both genera are highly congruent with the phylogenies. New taxa: Neothremma prolata n. sp., Neothremma mucronata n. sp., Farula constricta n. sp. 12 pp., 8 figs, gr. 8.

Discovery of the larval and pupal stages of the northern North American species Fabria complicata (Banks) reveals that the pupal mandibles are degenerate and that a silken sieve membrane is not constructed across the anterior opening of the case at pupation. Supporting this relationship with the small aberrant group of adecticous genera in the Phryganeidae are several other derived structural characters of larvae (long antennae, mesonotal sclerites) and adults (complex structure of segments IX and X of male genitalia), and of case-making behaviour (discrete rings instead of a continuous spiral). However, because complicata cannot be interpreted as monophyletic with any of these genera, recognition of a new genus, Beothukus, is required. Larvae of the population of B. complicatus studied in Newfoundland were found in small sphagnum bog pools where pH ranged from 4.2 to 4.9, and fed on algae, insects, and crustaceans; the species is univoltine at this site. Beothukus complicatus (Banks) is a noteworthy species because it is one of the few Trichoptera known to live in bog pools of low pH, and because it is another of the exceptions invalidating the widespread perception that all Trichoptera have decticous pupae. New taxon: Beothukus n. gen. 7 pp., 12 figs, 4.

5 pp., gr. 8.

4 pp., 12 figs, 4.

5 pp., 5 figs, gr. 8.

Pictorial hard covers. Condizione: Fine. No Jacket. 1st edition. Lower corner of front cover sl. bumped, otherwise as new. Weight: 1 Language: English.