Milnesium beasleyi  Kaczmarek, Jakubowska & Michalczyk, 2012

 

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 Tardigrada Register: www.tardigrada.net/register/0006.htm 

along with the appropriate original sources cited in this document and with the date stamp: 22-02-2015.

 


  1. Names
  2. Description
  3. Images
  4. Morphometry
  5. Molecular data
  6. Distribution
  7. Sources
     

1. Former names and synonyms

      None.

 


2. Description
 

Population

Description

Source

Contributor

Type series

  1. Habitus
    Body yellowish (before and after preparation). Eyes were absent in 5 of the 7 examined individuals (=71%, including the male), after mounting in Hoyers medium.

  2. Cuticle
    Cuticle without granulation or pores, but the dorsum covered with numerous tiny and shallow polygonal or rounded depressions (pseudopores), 0.1-0.4 m in diameter. These depressions, visible under PCM as light spots with undefined edges, are a manifestation of a fine reticulum, therefore placing the species within the granulatum group. Weak sculpturing is also present on the outer surfaces of all legs. Two cephalic papillae positioned laterally.

  3. Buccal apparatus
    Six peribuccal papillae (ventral papilla smallest) and six peribuccal lamellae around the mouth opening. Bucco-pharyngeal apparatus of the Milnesium type. Buccal tube slightly funnel-shaped, wider anteriorly (on average the posterior diameter is 92% of the anterior diameter). Pharyngeal bulb elongated, pear-shaped and without placoids or septulum.

  4. Legs and claws
    Claws of the Milnesium type, slender. Primary branches on all legs with small, but distinct accessory points detaching from the branch at its greatest curvature. Secondary claws of all legs without rounded basal thickenings. Secondary branches of external claws I-III and posterior claws IV with two points, and secondary branches of internal claws I-III and anterior claws IV with three points (i.e. claw configuration: [2-3]-[3-2]). Single, long transversal, cuticular bars under claws I-III present.

  5. Eggs
    Not found.

  6. Remarks
    One found male was generally similar to the females. However, apart from the diagnostic secondary sexual trait in this genus (secondary branches of claws I in the shape of large and robust hooks), the male also differed from the females of this species by a narrower buccal tube and shorter papillae, both in absolute and relative terms.
    Although the majority of specimens had a typical claw configuration [2-3]-[3-2], two females exhibited minor claw abnormalities. One female had small basal spurs on external claws I-III and posterior claws IV ([3-3]-[3-3]) and the other female had small basal spurs on posterior claws IV only ([2-3]-[3-3]). These basal spurs were always less curved (sometimes completely straight) and smaller than those on other claws (<2.0 m vs. >3.0 m) and thus could be without doubt be classified as developmental aberrations. Nevertheless, the presence of such claw abnormalities highlights the importance of examining a number of Milnesium specimens to ensure correct identifications.

Kaczmarek et al. (2012)

. Michalczyk, . Kaczmarek

 


3. Images
 

Population

Habitus

Cuticle

Buccal apparatus

Claws

Eggs

Contributor

Type series

[holotype||ventral view.1|40|PCM]
[paratype||ventral view.2|40|PCM]
[holotype||dorsal cuticle.1|100|PCM]
[paratype||dorsal cuticle.2|100|PCM]
[paratype||dorsal cuticle.3|100|PCM]
[paratype||dorsal cuticle.4|100|PCM]
[paratype||dorsal cuticle.5|100|PCM]
[paratype||leg cuticle.3|100|PCM]
[paratype||leg cuticle.4|100|PCM]
[holotype||ventral view.1a|60|PCM]
[holotype||ventral view.1b|100|PCM]
[paratype||ventral view.2a|60|PCM]
[paratype||ventral view.2b|100|PCM]
 
[paratype||claws II.2|100|PCM]
[paratype||claws II.3a|60|PCM]
[paratype||claws II.3b|60|PCM]
[paratype||claws II.3c|60|PCM]
[paratype||claws II.3d|60|PCM]
[holotype||claws IV.1a|60|PCM]
[holotype||claws IV.1b|60|PCM]
[holotype||claws IV.1c|60|PCM]
[holotype||claws IV.1d|60|PCM]
[paratype||abnormal claws IV.5|60|PCM]

?

. Michalczyk, . Kaczmarek

 


4. Morphometry
 

Population

Data

Source

Contributor

Type series

[6+1]

Kaczmarek et al. (2012)

. Michalczyk, . Kaczmarek

 


5. Molecular data
 

Population

Sequence

GenBank

Source

Contributor

Type series

?

n/a

n/a

n/a

 


6. Distribution
 

Sample

Coordinates

Altitude

Location name

Substrate

Collection date

Source

Contributor

Turkey.0
(locus typicus)

3714'52''N
3155'42''E

1480 m asl

Turkey, Konya Province, the Tinaztepe Mağarasi cave

moss from stone

09.2011

Kaczmarek et al. (2012)

. Michalczyk, . Kaczmarek

 


7. Sources
 

Kaczmarek, ., Jakubowska, N. & Michalczyk, . (2012) Current knowledge on Turkish tardigrades with a description of Milnesium beasleyi sp. nov. (Eutardigrada: Apochela: Milnesiidae, the granulatum group). Zootaxa, 3589: 49-64.
 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Copyright by ukasz Michalczyk

statystyka