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Summary

Evaporative cooling, through moistening of the eyes, panting, urinating and salivating, takes place in the spurred tortoise at high ambient temperatures. The mean temperature at which thermoregulatory salivation is initiated (39·5° ± 0·4°C) is constant, irrespective of body size, but the rate of panting is slower in heavier tortoises. Very small tortoises, however, do not pant for more than a few seconds.

Tortoises are inactive at 13°C and their body temperatures do not vary from the ambient. At 21° and 26°C, heat loss through transpiration exceeds metabolic heat production: at 33°C body temperatures are higher than the ambient. Increased range and variability at higher temperatures may be explained by the fact that spurred tortoises hold their breaths for long periods—a mechanism that could serve to reduce respiratory water loss. When breathing is actually taking place, however, the rate of respiration depends on body temperature: this grades into panting above 35°C.  相似文献   

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The taxa centering around Phlox austromontana Coville are revised. Named as a new variety is P. austromontana var. lutescens Welsh from eastern Garfield County, Utah. A new combination is provided as P. austromontana var.  jonesii (Wherry) Welsh.       相似文献   

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Summary

The flowers, fruit and seed of Dracontomelon costatum Blume are here described for the first time. It is remarkable in that four of the five carpels present in the flower are suppressed during fruit development. Information concerning habit and habitat is also included.  相似文献   

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Summary

The families Opecoelidae, Lepocreadiidae and Enenteridae are differentiated. The Enenteridae is considered to consist of three subfamilies, the Enenterinae, the Cadenatellinae subfam. nov. and the Pseudolepidapedinae, whose constituent genera are listed. The diagnostic features of the opecoelid subfamilies Opecoelinae, Plagioporinae and Stenakrinae are presented. Plagioporus is restricted to freshwater forms, and Lebouria is considered a synonym of Peracreadium, following the transfer of L. idonea Nicoll, 1909, to the latter genus as P. idoneum comb. nov. Caudotestis is considered to belong to the Stenakrinae, Trematichtys to the Allocreadiidae, Spinoplagioporus to the Enenterinae and Pycnadenoides to the Plagioporinae. Macvicaria gen. nov., with the type-species M. [Plagioporus] alacris (Looss, 1901) and also containing M. [Distoma] soleae (Dujardin, 1845) (syn. Plagioporus varius) is erected for some of the marine forms previously allocated to Plagioporus. Neolebouria is briefly discussed and N. merretti sp. nov. from Bathytyphlops sewelli is described. Gaevskajatrema gen. nov. is erected for type-species G. [Peracreadium] perezi (Mathias, 1926) and G. [Plagioporus] lethrini (Nagaty, 1942). Podocotyle is discussed, especially in relation to P. angulata (Dujardin, 1845), which is reinstated as the type-species, P. atomon (Rud., 1802) and P. staffordi Miller, 1941, and P. abitionis McFarlane, 1936, is transferred to Pellamyzon. Tellervotrema gen. nov. is erected for the type-species T. armstrongi sp. nov. from Nezumia aequalis, which is described, and T. [Plagioporus] beringi (Mamaev, 1965). The genera Peracreadium, Cainocreadium, Hamacreadium, Bathycreadium and Helicometra are also briefly discussed. In addition, a key to the plagioporine genera occurring in European Atlantic waters is presented.  相似文献   

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Summary

A key to the beetles of the 33 families of Heteromera (Cucujoidea) is presented for the world and a summary of about 67 imaginal characters (where known) for each family is also included. The key is intended not only for those who wish to identify beetles with heteromeroid aedeagi but also for those who want to learn the existing gaps in our knowledge on this subject and problems for future researches. Sincere efforts to distinguish or discover the primitive and derivative characters and groups for all families of beetles (Coleoptera including Strepsiptera) are urgently required.  相似文献   

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《Journal of Natural History》2012,46(14):1655-1678
A study was carried out of the protozoan ciliate epibionts present on diverse decapod crustaceans from two areas of the north-west Mediterranean. A total of 92 crustaceans was examined (65 brachyurans and 27 anomurans, belonging to 15 species). Seventeen ciliate species were identified (two heterotrichs, two chonotrichs, ten suctorians, and three peritrichs). This is the first record of the family of folliculinid ciliates as epibiont on crustaceans in Mediterranean waters. The suctorian Acinetides symbiotica, considered endemic to Lake Nyassa, was found in the sampling areas. Local variations, microlocation on the surface and anatomical units of the decapods, and differential distribution of epibionts were also considered.  相似文献   

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Osteochilotrema malayae gen. nov. sp. nov. (Osteochilotrematinae subfam. nov.) from the intestine of Osteochilus hasselti in Malaysia is described. It is characterized mainly by the symmetrical extracaecal testes and the structure of the male terminal ducts. Protocladorchis pangasii is reported from Pangasius pangasius, Barbus daruphani, B. tambroides and from Malaysia for the first time. It is redescribed and the generic diagnosis amended. Helostomatis indica is reported from O. hasselti in Malaysia, both new records. The subfamily and generic diagnoses are amended. Orientodiscus jumnai was recovered from new hosts, B. tambroides and P. micronemus, and is new for Malaysia.  相似文献   

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New taxa include: Cryptantha cinerea (Torr.) Cronq. var. arenicola Higgins & Welsh; Physaria chambersii Rollins var. sobolifera Welsh (Cruciferae); Phacelia demissa Gray var. minor N. D. Atwood (Hydrophyllaceae); Iris pariensis Welsh (Iridaceae); Astragalus preussii var. cutleri Barneby and Pediomelum aromaticum (Payson) Welsh var. tuhyi Welsh (Leguminosae); Abronia nana Wats. var. harrisii Welsh (Nyctaginaceae); Camissonia atwoodii Cronq. (Onagraceae); Habenaria zothecina Higgins & Welsh (Orchidaceae); Aqiiilegia formosa Fisch. in DC. var. fosteri Welsh (Ranunculaceae). New nomenclatural combinations include: Rhus aromatica Ait. var. simplicifolia (Greene) Cronq. (Anacardiaceae); Lomatium kingii (Wats.) Cronq., L. kingii var. alpinum (Wats.) Cronq. (Apiaceae); Cryptantha cinerea (Torr.) Cronq. var. laxa (Macbr.) Higgins; Mertensia lanceolata (Pursh) DC. var. nivalis (Wats.) Higgins (Boraginaceae); Opuntia erinacea Engelm. var. aurea (Baxter) Welsh (Cactaceae); Arenaria fendleri Gray var. aculeata (Wats.) Welsh, A. fendleri var. eastwoodiae (Rydb.) Welsh, Lychnis apetala L. var. kingii (Wats.) Welsh, Stellaria longipes Goldie var. monantha (Hulten) Welsh (Caryophyllaceae); Draba densifolia Nutt. ex T. & G. var. apiculata (C. L. Hitchc.) Welsh, D. oligosperma Hook. var. juniperina (Dorn) Welsh, Physaria acutifolia Rydb. var. stylosa (Rollins) Welsh, Thelypodiopsis sagittata (Nutt.) Schulz var. ovalifolia (Rydb.) Welsh (Cruciferae); Lotus plebeius (T. Brandg.) Barneby, Lupinus polyphyllus Lindl. in Edwards var. ammophilus (Greene) Barneby, L polyphyllus var. humicola (A. Nels.) Barneby, L. argenteus Pursh var. fulvomaculatus (Payson) Barneby, L. argenteus var. palmeri (Wats.) Barneby, Pediomelum aromaticum (Payson) Welsh, P. epipsilum (Barneby) Welsh, Psoralidium lanceolatum (Pursh) Rydb. var. stenophyllum (Rydb.) Welsh, and P. lanceolatum var. stenostachys (Rydb.) Welsh (Leguminosae); Mirabilis linearis (Pursh) Hiemerl var. decipiens (Standl.) Welsh (Nyctaginaceae); Camissonia boothii var. condensata (Munz) Cronq., C. boothii var. villosa (Wats.) Cronq., C. clavaeformis (Torr. & Frem.) Raven var. purpurascens (Wats.) Cronq., C. scapoidea (T. & G.) var. utahensis (Raven) Welsh, Oenothera caespitosa var. macroglottis (Rydb.) Cronq., Oe. caespitosa var. navajoensis (Wagner, Stockhouse, & Klein) Cronq., Oe. flava (A. Nels.) Garrett var. acutissima (W. L. Wagner) Welsh, and Oe. primiveris Gray var. bufonis (Jones) Cronq. (Onagraceae); Papaver radicatum Rottb. var. pygmaeum (Rydb.) Welsh (Papaveraceae); Dodecatheon pulchellum (Raf.) Merr. var. zionense (Eastw.) Welsh (Primulaceae); Aquilegia flavescens Wats. var. rubicunda (Tidestr.) Welsh, Delphinium andersonii Gray var. scaposum (Greene) Welsh, D. occidentalis (Wats.) Wats. var. barbeyi (Huth) Welsh, and Ranunculus andersonii Gray var. juniperinus (Jones) Welsh (Ranunculaceae); Purshia mexicana (D. Don) Welsh and P. mexicana var. stansburyi (Torr.) Welsh (Rosaceae); Galium mexicanum H.B.K. var. asperrimum (Gray) Higgins & Welsh (Rubiaceae); Castilleja parvula Rydb. var. revealii (N. Holmgren) N. D. Atwood and C. rhexifolia Rydb. var. sulphurea (Rydb.) N. D. Atwood (Scrophulariaceae).  相似文献   

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New taxa include Lomatium packardiae Cronq. (Apiaceae), Croton texensis (Klotzsch) Muell. Arg. var. utahensis Cronq. (Euphorbiaceae). Other nomenclatural innovations include: Cymopterus longipes var. ibapensis (M. E. Jones) Cronq., Lomatium roseanum Cronq. (Apiaceae); Camissonia boothii (Douglas) Raven var. decorticans (Hook. & Arn.) Cronq., Camissonia boothii (Douglas) Raven var. desertorum (Munz) Cronq., Camissonia clavaeformis (Torr. & Frém.) Raven var. aurantiaca (Munz) Cronq., Camissonia clavaeformis (Torr. & Frém.) Raven var. cruciformis (Kellogg) Cronq., Camissonia clavaeformis (Torr. & Frém.) Raven var. funerea (Raven) Cronq., Camissonia clavaeformis (Torr. & Frém.) Raven var. lancifolia (A. A. Heller) Cronq., Camissonia heterochroma (S. Wats.) Raven var. monoensis (Munz) Cronq., Camissonia kernensis (Munz) Raven var. gilmanii (Munz) Cronq., Camissonia scapoidea (Torr. & Gray) Raven var. macrocarpa (Raven) Cronq., Oenothera biennis L. var. strigosa (Rydb.) Cronq., Oenothera pallida Lindl. var. runcinata (Engelm.) Cronq. (Onagraceae).  相似文献   

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A two-year study of the rare vascular plants of the Idaho National Engineering Laboratory generated new data on the abundance, distribution, and habitat features of eight taxa presently under review at either the federal or state level, or recently proposed for such review. Astragalus ceramicus Sheld. var. apus Barneby is common on the INEL and adjacent areas and will be recommended for removal from further consideration at the federal level and placed on Idaho's Federal Watch List. Coryphanta missouriensis (Sweet) Britt. & Rose is common throughout east central Idaho, but will be recommended for retainment on the State Watch List. Gymnosteris nudicaulis (H. & A.) Greene and Oxytheca dendroidea Nutt. are also recommended for retention on the State Watch List. Four taxa not previously known to occur in Idaho or not known from the southeastern part of the state ( Astragalus gilviflorus Sheld., Astragalus kentrophyta Gray var. jessiae (Peck) Barneby, Gilia polycladon Torr., and Lesquerella kingii S. Wats. var. cobrensis Roll. & Shaw) were encountered and evaluated with reference to current or potential threats, and are recommended for placement on Idaho's State Watch List.      相似文献   

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Specimens of Oxytropis in the herbaria of The Natural History Museum and Royal Botanic Garden were examined to interpret their role in nomenclature. This is the first attempt at a systematic overview of specimens so important in understanding the genus as it occurs in North America. The review of specimens at BM and K during the present research has resulted in realignment of names of some of the taxa. Oxytropis campestris var. gracils (A. Nelson) Barneby is recognized herein as being predated by O. campestris var. spicata Hook., O. sericea var. spicata (Hook.) Barneby is replaced by O. sericea var. speciosa (Torr. & A. Gray) Welsh comb. nov., and O. campestris var. terrae-novae (Fern.) Barneby is superseded by O. campestris var. minor (Hook.) Welsh comb. nov. One new taxon is proposed: Oxytropis deflexa (Pall.) DC. var. pulcherrima Welsh & A. Huber, var. nov. Lectotypes are designated for the following taxa: Astragalus retroflexus Pall. Oxytropis artica R. Br., O. artica var. α subumbellata Hook., O. arctica var. β uniflora Hook. O. campestris var. β sepciosa Torr & A. Gray, O. campestris var. ξ melanocephala Hook., O. campestris var. δ spincata Hook., O. multiceps var. minor A. Gray, O. splendens Douglas ex Hook., O. splendens β richardsonii Hook., O. uralensis β subsucculenta Hook., and O. uralensis γ minor Hook.  相似文献   

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