Jun 252015

Family : Macrochelidae

This family has been first described by Vitzthum, 1930.

Genera : Geholaspis

This genera has been first described by Berlese, 1918.

Synonyms :

  • Holostaspis hortorum Berlese, 1904
  • Macrocheles hortorum Berlese, 1918
  • Geholaspis mandibularis hortorum Valle, 1953

Short diagnosis :

Very similar species to Geholaspis mandibularis, setae, j5 j6, J2, J5, and z6 mostly smooth, other dorsal setae plumose and brush-like. Ventrianal, sternal and metasternal setae short and needle-like, ornamentation of ventrianal shield reticulate.

Its seems that the male is unknown !

Distribution : Europe, the example here reported is from France.

Bibligraphy :

  • A review of the Macrochelidae of the British Isles, HYATT and EMBERSON
  • Macrochelid mites of Slovakia, PETER MASAN
  • Contribution to the Macrochelidae fauna of Hungary (Acari: Mesostigmata), JENÕ KONTSCHÁN

Links :


Conclusion :

I am open to receive other exemplars of this same genera (in alcohol or microscopic mount).

Thanks for your remarks !


Other species of the genera : aeneus, alpinus, asper, berlesei, biperforatus, bulgaricus, comelicensis, foroliviensis, hortorum, ilvana, lagreca, longisetosus, longispinosus, longulus, mandibularis, pauperior, ponticus

  • Geholaspis aeneus Krauss, 1970
  • Geholaspis alpina (Berlese, 1887)
  • Geholaspis asper Valle, 1953
  • Geholaspis berlesei Valle, 1953
  • Geholaspis bianchii Valle & Mazzoleni, 1967
  • Geholaspis comelicensis Lombardini, 1962
  • Geholaspis foroliviensis Lombardini, 1943
  • Geholaspis hortorum (Berlese, 1904)
  • Geholaspis ilvana Valle & Mazzoleni, 1967
  • Geholaspis lagrecai Valle, 1963
  • Geholaspis longispinosa (Kramer, 1876)
  • Geholaspis longula (Berlese, 1882)
  • Geholaspis mandibularis (Berlese, 1904)
  • Geholaspis pauperior (Berlese, 1918)
Jun 152015

Have you ever seen such a perfect microphotography of a tick ? This is the astonishing work of Paul Leroy again. Here is a female of Ixodes ricinus, commonly called the castor bean tick, this name sounds funny for the French speaking guy I am…

This tick has a very large distribution in Eurasia and is probably the most common tick found on people.

A female fasting tick has usually a size of 4 mm. The scutum is globally rouded, and slightly longer than large, as you can see on the photo. The posterior margin of the body is largely rounded, which gives this typical shape of castor bean (castor seed is a better appropriated term).

Each pair of coxa has an external short spur. The coxae I have a long internal spur. Coxae I are syncoxae, but the striated half posterior part is slightly visible.

Ixodes ricinus is an ubiquitous triphasic tick. It feeds on a wide variety of vertebrate hosts and is a vector of numerous pathogens (Flavivirus, Borrelia, Babesia, Rickettsia, Anaplasma, Louping ill,…).

Enjoy this outstanding photography, it looks like a very good color drawing !



Jun 082015

Hello world,

Here is a ventral view of a male of Haemaphysalis punctata. This tick is widespread in Europe but can be found also in central Asia.

The male has very long internal spurs on the coxas IV, as you can notice on the enclosed remarquable photo done by Paul Leroy. The tick shown appears differently as other ones you can find on the internet, because this is a microscopic mount, and the animal has been cleared to reach semi transparency.

According to the site quoted here below, this type of tick shows no preference for environment and can live in humid / cold, or warm / desertic environment. This is probably due to some specific adaptations…

According to an Ukrainian study (see here below), it can be found on very different types of hosts (wide range of mammals, birds, but also occasionnaly on reptile). Common hosts in human environment : cattle, sheep, goat, horse, deer, rabbit, humans…

As other ticks, it can transmit several types of diseases :

  • Rickettsia siberica,
  • Tickborne encephalitis virus
  • Babesia bobis, B. bigeminum…
  • Theileria mutans, T. recondita…
  • Coxiella burneti
  • Brucella melitensis
  • Bhanja virus
  • Francisella tularensis

With such diseases transmitted, it raises the question of good and evil. Is such a tick good or evil ? How can we accept the fact that such a being could have a benefic role in the animal reign diversity ? If you have your aswer to this question, let me know !

Litterature :

  • The ecology, bionomics, and behaviour of Haemaphysalis (Aboimisalis) punctata tick in central Europe, Josef Nosek (No open access)
    • In this document, you can have an overview of the big diversity of hosts for this type of tick.

Links :

Jun 012015

Our dear Linnaeus first described this species under the name Pediculus pubis. The first question I ask to myself is a little bit disrespectful towards our dear Linnaeus : where did he found his first Pediculus pubis ?

You do not know ? Ok, maybe you do not know at all, where usually lives Pthirus inguinalis ? But if you already know, Pediculus humanus, you can easily imagine where lives Pediculus pubis. Do I need to give you some more explanations ? Come on…

Actually we can find all sort of different orthographs and synonyms for this immodest parasite, and I admit I still have difficulties in writing its correct name :

  • Pediculus pubis
  • Pediculus ferus
  • Phtirus pubis
  • Pthirus pubis
  • Phthirus chavesi
  • Pthirius inguinalis

I will keep this one, from the very serious site http://phthiraptera.info/ : Pthirus inguinalis. And this is probably the official stable name for this little big louse ! You just have to remember well where is the H, and where there is no I !

I am happy to share with you tree outstanding photos of this Pthiridae from my dear friend Paul Leroy. Enjoy the fine details, and the ugly beauty of these crawlies, enjoy the forthcoming little baby, already with its strange scissors !