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About Blattamann

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  • Birthday 02/12/1969

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    Oxford, UK
  • Interests
    Cockroach taxonomy, ecology and rearing

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  1. Blattamann

    Roach ID

    Cameron Highlands, Malaysia = possibly Morphna near badia Rotten bark of a dead tree in Kemensah Heights, Malaysia = Morphna sp Humid leaf litter, ground dweller - Kemensah Heights, Malaysia = probable immature of above Rhypharobia is only found in Afrotropical region. cheers D
  2. Blattamann

    Help! Death by Bloating!

    Hi all, having just read the string on 'bloated' cockroaches I thought I'd add my thoughts. The 'worm' emerging fro the male Gromphaddorhina is part of the male genitalia, referred to as the 'genital hook' or 'L3'. It is an eversible tube with a short sclerotised hook at the apex, the shape of which can help to identify some species complexes. If you squeeze hard, you can make this tube 'pop out' of most members of the Blaberidae. The genitalia for the other families do not have this tube, but a similar and more sclerotised hook. The cause of the bloating is probably bacterial. One of the major causes of such problems is: Rickettsiella which shows itself by distended swollen abdomens, and towqards the final stages of the disease, white matter oozing from the tergites and sternites. The white matter is the infection of the fat body. Since female cockroaches have more fat than the males, the disease is more obvious in females. After the roach is dead, perform a post mortem (send an image), if the body is full of whitish gunk, Rickettsiella is the likely culprit. Another common species of bacteria called Serratia marscescens Bizio, is found naturally in the guts of cockroaches, but can also cause death of entire cultures. This is readily diagnosed, since cockroaches affected by this often have the paler regions of the body (i.e. intersegmental membranes) coloured pink. cheers Darren
  3. Blattamann

    Ectobius lapponicus

    Hi, there are a few papers on the culture of three Ectobius species found in th UK, see below. In the Uk the Ectobius are known as the tawny E. pallidus; the dusky E. lapponicus and the lesser E. panzeri. The problem with common names is that each country has their own, which in the days of international communication through the web makes these 'local' names misleading and confusing. If you ask me about E. pallidus I can tell you much, ask me about the 'spotted Mediterranean cockroach', I can tell you very little. Brown, V.K. 1973. Collection and culture of field-dwelling cockroaches for experimental purposes. Entomologist 106: 114-117. Brown, V.K. 1973. The over-wintering stages of Ectobius lapponicus (L.) (Dictyoptera: Blattidae). Journal of Entomology Ser. A. 48(1): 11-24. Brown, V.K. & Rider, L. 1974. Improved technique for rearing over-wintering cockroach nymphs. Entomologist’s Gazette 25: 44. cheers D
  4. Blattamann

    How many species of roach exist?

    Hi, several years ago I compiled an annotated list and bibliography of 'pest' cockroaches, its somewhat out-of-date, but have posted the short version (species list) below. Some of these species are pests within a restricted area e.g. single area within a country, while others are widespread circumtropical pests. If we included the peridomestic species in this list it would be far greater, I have listed those which at some point have been published as a pest within buildings (human dwellings plus commercial premises). As to 'what do roaches do for us' question, they are indeed an important part of the leaf-litter decomposition guild, though this may only be true for the Tropics. Some species may act as pollinators for plants. They form a large portion of the biomass of insects in leaf litter and provide food for many larger animals. cheers Darren BLATTIDAE Blatta orientalis Linnaeus Blatta lateralis Walker Drymaplaneta semivitta (Walker) Eurycotis biolleyi Rehn Eurycotis floridana (Walker) Herbardina concinna (DeHaan) Neostylopyga rhombifolia (Stoll) Pelmatosilpha larifuga Gurney Periplaneta americana (Linnaeus) Periplaneta australasiae (Fabricius) Periplaneta brunnea Burmeister Periplaneta fuliginosa (Serville) Periplaneta japonica Karny Periplaneta floweri Hanitsch POLYPHAGIDAE Polphaga aegyptiaca (Linnaeus) Polyphaga saussurei (Dohrn) BLATTELLIDAE Balta notulata (Stal) Balta vilis (Brunner) Blattella asahinai Mizukubo Blattella germanica (Linnaeus) Blattella lituricollis (Walker) Blattella nipponica Asahina Blattella vaga Hebard Cariblatta lutea (Saussure & Zehtner) Eudromiella n.sp Fisk & Gurney Ischnoptera bergrothi (Griffini) Iscnoptera vulpina Hebard Lobopterella dimitiatipes (Bolivar) Neoblattella panamae (Hebard) Onchostylus pallidiolus (Shiraki) Parcoblatta spp Parcoblatta fulvescens (Saussure & Zehtner) Parcoblatta kyotensis Asahina Parcoblatta pennysylvanica (DeGeer) Pseudomops septrionalis (Hebard) Paratemnopteryx couloniana (Saussure) Shelfordina orchidae Asahina Symploce pallens (Stephens) Supella longipalpa (Fabricius) BLABERIDAE Archimandritta tessellata Rehn Calolampra irrorata (Fabricius) Nauphoeta cinerea (Olivier) Opisthoplatia orientalis Burmeister Pycnoscelus surinamensis (Linnaeus) Leucophaea maderae (Fab.) Blaberus spp Ectobius spp Panchlora spp Panchlora nivea (Linnaeus) Phoetalia pallida (Brunner)
  5. Blattamann

    How many species of roach exist?

    There are approximately 4,500 described species and probably as many undescribed. As pests, there are currently about 40 species recognised as 'pest' species. cheers Darren
  6. Blattamann

    Male Deropeltis paulinoi

    Hi, The D. paulinoi, certainly in the UK stock originated in Windhoek, Namibia, where they are synathropic especially in the rains and, and are often a nusiance in houses. They are aposomatic in colouration, nymphs are gregarious to emphasize their colour and can be found in large agregations. They produce a benzoquinone defence secretion, which although not fatal can cause minor skin burns, ulceration of the mouth and blurred visiion. It is lilley to have evolved against mammal anti-predation. The simplest way of determining if a female is adult or not is to check whether she has styles on the subgenital plate, if present immature if not then adult, since only adult makes possess styles. cheers Darren
  7. Blattamann

    Supella longipalpa

    Blattella vaga Hebard, peridomestic but not regarded as a pest as such, adults may fly to light