Illacme\according to Marek et al 2016

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Marek P, Krejca J, Shear W (2016) A new species of Illacme Cook & Loomis, 1928 from Sequoia National Park, California, with a world catalog of the Siphonorhinidae (Diplopoda, Siphonophorida). ZooKeys (626) : 1–43, doi. Versioned wiki page: 2016-10-20, version 103130, https://species-id.net/w/index.php?title=Illacme%5Caccording_to_Marek_et_al_2016&oldid=103130 , contributors (alphabetical order): Pensoft Publishers.

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BibTeX:

@article{Marek2016ZooKeys,
author = {Marek, Paul E. AND Krejca, Jean K. AND Shear, William A.},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {A new species of Illacme Cook & Loomis, 1928 from Sequoia National Park, California, with a world catalog of the Siphonorhinidae (Diplopoda, Siphonophorida)},
year = {2016},
volume = {},
issue = {626},
pages = {1--43},
doi = {10.3897/zookeys.626.9681},
url = {http://zookeys.pensoft.net/articles.php?id=9681},
note = {Versioned wiki page: 2016-10-20, version 103130, https://species-id.net/w/index.php?title=Illacme%5Caccording_to_Marek_et_al_2016&oldid=103130 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - A new species of Illacme Cook & Loomis, 1928 from Sequoia National Park, California, with a world catalog of the Siphonorhinidae (Diplopoda, Siphonophorida)
A1 - Marek P
A1 - Krejca J
A1 - Shear W
Y1 - 2016
JF - ZooKeys
JA -
VL -
IS - 626
UR - http://dx.doi.org/10.3897/zookeys.626.9681
SP - 1
EP - 43
PB - Pensoft Publishers
M1 - Versioned wiki page: 2016-10-20, version 103130, https://species-id.net/w/index.php?title=Illacme%5Caccording_to_Marek_et_al_2016&oldid=103130 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.626.9681

Wikipedia/ Citizendium:

<ref name="Marek2016ZooKeys">{{Citation
| author = Marek P, Krejca J, Shear W
| title = A new species of Illacme Cook & Loomis, 1928 from Sequoia National Park, California, with a world catalog of the Siphonorhinidae (Diplopoda, Siphonophorida)
| journal = ZooKeys
| year = 2016
| volume =
| issue = 626
| pages = 1--43
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.626.9681
| url = http://zookeys.pensoft.net/articles.php?id=9681
| pmc =
| accessdate = 2024-12-23

}} Versioned wiki page: 2016-10-20, version 103130, https://species-id.net/w/index.php?title=Illacme%5Caccording_to_Marek_et_al_2016&oldid=103130 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Siphonophorida
Familia: Siphonorhinidae

Name

Illacme Cook & Loomis, 1928 – Wikispecies link – Pensoft Profile

Family placement

The genus Illacme is placed in the family Siphonorhinidae based on the following characters: Head pear-shaped (♂) or triangular (♀), not elongate or beak-shaped, as in the Siphonophoridae (Fig. 2A–F). Antennae elbowed between antennomeres 3, 4 (Figs 2B; 3A, B). Antennomeres 5, 6 with apical dorsal cluster of 7 or 8 basiconic sensilla (Bs2) in slight depression, not in defined circular pits, as in the Siphonophoridae (Figs 2B, D; 3A, B). Antennomere 1 set deep in cranium, not entirely visible dorsally as in Siphonophoridae (Figs 2A, B; 2E; 3C, D). Antennomere 2 longer than wide, conical, not doughnut-shaped and wider than long as typical in Siphonophoridae. Anterior margin of collum straight, not emarginate medially as in Siphonophoridae. Sterna with prominent midline triangular projections, oriented ventrally (Figs 3E, F; 4A, B). Posterior gonopods with distal podomere divided into 2–4 branches with one branch spike-like (Figs 4C, D, E, F; 5A–D). See also diagnoses of Illacme in Shelley (1996b[1], pg. 23), Marek et al. (2012[2], pg. 85), and Enghoff et al. (2015[3], pg. 386), and of Siphonorhinidae in Shelley and Hoffman (2004[4], pg. 218), Wesener (2014[5], pg. 417), and Enghoff et al. (2015[3], pg. 386).
Diagnosis. Adults of Illacme are distinct from other siphonorhinid genera (and commonly encountered millipedes co-occurring with Illacme tobini sp. n. and Illacme plenipes) based on the combination of the following characters: Body light cream-colored, thread-like, extremely narrow and long (max. width: ♂ 0.55, ♀ 0.64; max. length: ♂ 28.16, ♀ 40.40). Adult individuals with 84–192 segments, and with 318–750 legs. Body covered with many long delicate setae, imparting a velvety appearance (Figs 5E, F; 6A, B). Antennae elbowed between antennomeres 3, 4 (Figs 2B; 3A, B). Antennomeres 5, 6 enlarged, appearing much larger relative to other articles (Figs 2B, D, 3A, B). Head pear-shaped in males or triangular or chevron-shaped in females, eyeless (Fig. 2C–F). Genae slightly convex (♂) or straight (♀), not concave (imparting a teardrop-shaped head) as in Nematozonium filum, Siphonorhinus sp. (Wesener 2014[5]), and the family Siphonophoridae (Shelley 1996, Shelley and Hoffman 2004[4]). Mouthparts (gnathochilarium, mandibles) and labrum tightly appressed, tapered anteriorly to rounded apex—not beak-shaped, as in the Siphonophoridae (Figs 2A–F; 3C, D). Labrum with a deep medial slit, margins lined with teeth (Figs 6C–F; 7A–F). Denticulate shelf-like carina, projecting dorsally from labrum-epistome margin (Figs 6E, F; 7D; 8A, B). 9th and 10th leg pairs modified into gonopods, each comprising 7 podomeres (Figs 4C, D; 8C–F; 9A–F). Anterior gonopod thick, bulkier than posterior gonopod (Figs 4C, D; 8C–F). Anterior gonopodal apex (podomere 7, A7—Fig. 4C, D) spade-shaped; at rest, cupped sheath-like around posterior gonopodal stylets (podomere 7, P7—Figs 4E, F; 9A–F). Posterior gonopodal podomere 7 deeply divided, comprising a bundle of 3 (Illacme plenipes) or 4 (Illacme tobini sp. n.) stylus-shaped articles; one article spike-shaped (Fig. 4E, F); other siphonorhinid taxa with 2 stylus-shaped articles and a small spine (Nematozonium filum) or 2 articles without spine (Siphonorhinus species and Kleruchus olivaceus Attems, 1938). 2, 3 dorsal-most, longest articles laminate distally and recurved laterally, with denticulate posterior margins appearing saw-like (Fig. 5A–D). Ventral-most, shortest article acuminate distally, spike-like.

Taxon Treatment

  • Marek, P; Krejca, J; Shear, W; 2016: A new species of Illacme Cook & Loomis, 1928 from Sequoia National Park, California, with a world catalog of the Siphonorhinidae (Diplopoda, Siphonophorida) ZooKeys, (626): 1-43. doi

Images

Figure 2. A Dorsal view of head, antennae and rings 1–5 of Illacme tobini sp. n. (scale bar 300 µm) B the same of Illacme plenipes (scale bar 300 µm) C Lateral (right) view of head and rings 1–5 of Illacme tobini sp. n. (scale bar 300 µm) D the same of Illacme plenipes (scale bar 300 µm). Illacme tobini sp. n.: E anterolateral (right) view of head and first leg pair (scale bar 100 µm) F lateral (left) view of head and first leg pair, antennae broken off at base (scale bar 100 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.)
Figure 2. A Dorsal view of head, antennae and rings 1–5 of Illacme tobini sp. n. (scale bar 300 µm) B the same of Illacme plenipes (scale bar 300 µm) C Lateral (right) view of head and rings 1–5 of Illacme tobini sp. n. (scale bar 300 µm) D the same of Illacme plenipes (scale bar 300 µm). Illacme tobini sp. n.: E anterolateral (right) view of head and first leg pair (scale bar 100 µm) F lateral (left) view of head and first leg pair, antennae broken off at base (scale bar 100 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.) 
Figure 3. A Lateral (right) view of antenna of Illacme tobini sp. n. (scale bar 100 µm) B the same of Illacme plenipes (scale bar 100 µm). Illacme tobini sp. n.: C ventral view of head and rings 1–5 (scale bar 300 µm) D the same of head and rings 1–3, magnified view (leg pairs 2–6 broken off at prefemur-femur joint) (scale bar 200 µm) E Ventral view of rings 6 and 7 with sternites, pleurites and leg bases of Illacme tobini sp. n. (scale bar 100 µm) F the same of Illacme plenipes (scale bar 100 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.)
Figure 3. A Lateral (right) view of antenna of Illacme tobini sp. n. (scale bar 100 µm) B the same of Illacme plenipes (scale bar 100 µm). Illacme tobini sp. n.: C ventral view of head and rings 1–5 (scale bar 300 µm) D the same of head and rings 1–3, magnified view (leg pairs 2–6 broken off at prefemur-femur joint) (scale bar 200 µm) E Ventral view of rings 6 and 7 with sternites, pleurites and leg bases of Illacme tobini sp. n. (scale bar 100 µm) F the same of Illacme plenipes (scale bar 100 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.) 
Figure 4. A Anterior view of ring 6 sterna of Illacme tobini n. sp (scale bar 50 µm) B anterolateral (left) view of the same of Illacme plenipes (scale bar 50 µm) C Lateral (right) view of gonopods (leg pairs 9 and 10) of Illacme tobini sp. n. (scale bar 100 µm) D the same of Illacme plenipes (scale bar 100 µm) E Ventral view of gonopods of Illacme tobini sp. n. (centered on right posterior gonopod, leg-pair 10) (scale bar 50 µm) F the same of Illacme plenipes (scale bar 50 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.)
Figure 4. A Anterior view of ring 6 sterna of Illacme tobini n. sp (scale bar 50 µm) B anterolateral (left) view of the same of Illacme plenipes (scale bar 50 µm) C Lateral (right) view of gonopods (leg pairs 9 and 10) of Illacme tobini sp. n. (scale bar 100 µm) D the same of Illacme plenipes (scale bar 100 µm) E Ventral view of gonopods of Illacme tobini sp. n. (centered on right posterior gonopod, leg-pair 10) (scale bar 50 µm) F the same of Illacme plenipes (scale bar 50 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.) 
Figure 5. A Lateral (right) view of gonopods of Illacme tobini sp. n. (centered on right posterior gonopod) (scale bar 50 µm) B the same of Illacme plenipes (scale bar 50 µm) C Lateral (right) view of right posterior gonopod apex of Illacme tobini sp. n. (scale bar 25 µm) D the same of Illacme plenipes (scale bar 25 µm) E Lateral (right) view of head, collum, and rings 2, 3 of Illacme tobini sp. n. (scale bar 200 µm) F the same of Illacme plenipes (scale bar 200 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.)
Figure 5. A Lateral (right) view of gonopods of Illacme tobini sp. n. (centered on right posterior gonopod) (scale bar 50 µm) B the same of Illacme plenipes (scale bar 50 µm) C Lateral (right) view of right posterior gonopod apex of Illacme tobini sp. n. (scale bar 25 µm) D the same of Illacme plenipes (scale bar 25 µm) E Lateral (right) view of head, collum, and rings 2, 3 of Illacme tobini sp. n. (scale bar 200 µm) F the same of Illacme plenipes (scale bar 200 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.) 
Figure 6. A Dorsolateral (left) view of tenth prozonite and metatergite of Illacme tobini sp. n. (scale bar 100 µm) B the same of Illacme plenipes (scale bar 100 µm) C Dorsal view of anterior region of head and labrum of Illacme tobini sp. n. (scale bar 10 µm) D the same of Illacme plenipes (the gnathochilarial apices can be seen projecting beneath the medially split labrum) (scale bar 10 µm). Illacme tobini sp. n.: E anterolateral (left) view of head and first leg pair (scale bar 50 µm) F anterior view of head with gnathochilarium open showing flabellate mandibles (scale bar 50 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.)
Figure 6. A Dorsolateral (left) view of tenth prozonite and metatergite of Illacme tobini sp. n. (scale bar 100 µm) B the same of Illacme plenipes (scale bar 100 µm) C Dorsal view of anterior region of head and labrum of Illacme tobini sp. n. (scale bar 10 µm) D the same of Illacme plenipes (the gnathochilarial apices can be seen projecting beneath the medially split labrum) (scale bar 10 µm). Illacme tobini sp. n.: E anterolateral (left) view of head and first leg pair (scale bar 50 µm) F anterior view of head with gnathochilarium open showing flabellate mandibles (scale bar 50 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.) 
Figure 7. Illacme tobini sp. n.: A anterior view of head with gnathochilarium open showing flabellate mandibles (scale bar 30 µm) B anterolateral (right) view of head with gnathochilarium open showing mandibles and pectinate lamella with numerous rows of jagged ventrally projecting serrulae (scale bar 20 µm) C dorsal view of V-shaped endochilarial frontal body with fringed lobes (spatulae) protruding through gnathochilarial stipes (scale bar 20 µm) D anterolateral (right) view of open mouth and keel-shaped pectinate lamella of the mandible nested in V-shaped groove of the endochilarium (scale bar 30 µm) E dorsal view of labrum with deep medial incision (scale bar 10 µm) F anterior view of labrum with heavily porous surface (scale bar 10 µm). (Catalog #: Illacme tobini sp. n. MPE00735.)
Figure 7. Illacme tobini sp. n.: A anterior view of head with gnathochilarium open showing flabellate mandibles (scale bar 30 µm) B anterolateral (right) view of head with gnathochilarium open showing mandibles and pectinate lamella with numerous rows of jagged ventrally projecting serrulae (scale bar 20 µm) C dorsal view of V-shaped endochilarial frontal body with fringed lobes (spatulae) protruding through gnathochilarial stipes (scale bar 20 µm) D anterolateral (right) view of open mouth and keel-shaped pectinate lamella of the mandible nested in V-shaped groove of the endochilarium (scale bar 30 µm) E dorsal view of labrum with deep medial incision (scale bar 10 µm) F anterior view of labrum with heavily porous surface (scale bar 10 µm). (Catalog #: Illacme tobini sp. n. MPE00735.) 
Figure 8. A Dorsal view of anterior region of head and labrum of Illacme tobini sp. n. (scale bar 20 µm) B the same of Illacme plenipes (scale bar 20 µm) C Ventrolateral (right) view of gonopods of Illacme tobini sp. n. (scale bar 200 µm) D the same of Illacme plenipes (scale bar 200 µm) E Anteroventral view of gonopods of Illacme tobini sp. n. (scale bar 50 µm) F the same of Illacme plenipes (scale bar 50 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.)
Figure 8. A Dorsal view of anterior region of head and labrum of Illacme tobini sp. n. (scale bar 20 µm) B the same of Illacme plenipes (scale bar 20 µm) C Ventrolateral (right) view of gonopods of Illacme tobini sp. n. (scale bar 200 µm) D the same of Illacme plenipes (scale bar 200 µm) E Anteroventral view of gonopods of Illacme tobini sp. n. (scale bar 50 µm) F the same of Illacme plenipes (scale bar 50 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.) 
Figure 9. A Ventral view of gonopods of Illacme tobini sp. n. (scale bar 50 µm) B the same of Illacme plenipes (scale bar 50 µm) C Lateral (right) view of right anterior gonopod (leg-pair 9) of Illacme tobini sp. n. (scale bar 50 µm) D the same of Illacme plenipes (scale bar 50 µm) C Ventral view of gonopods of Illacme tobini sp. n. (centered on right anterior gonopod) (scale bar 50 µm) D the same of Illacme plenipes (scale bar 50 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.)
Figure 9. A Ventral view of gonopods of Illacme tobini sp. n. (scale bar 50 µm) B the same of Illacme plenipes (scale bar 50 µm) C Lateral (right) view of right anterior gonopod (leg-pair 9) of Illacme tobini sp. n. (scale bar 50 µm) D the same of Illacme plenipes (scale bar 50 µm) C Ventral view of gonopods of Illacme tobini sp. n. (centered on right anterior gonopod) (scale bar 50 µm) D the same of Illacme plenipes (scale bar 50 µm). (Catalog #s: Illacme tobini sp. n. MPE00735, Illacme plenipes SPC000932.) 

Other References

  1. ↑ Shelley R (1996b) The milliped order Siphonophorida in the United States and northern Mexico. Myriapodologica 4: 21–33. http://www.vmnh.net/content/uploads/PDF/Research_and_Collections/Myriapodologica/Myriapodologica_v4_n4.pdf
  2. ↑ Marek P, Shear W, Bond J (2012) A redescription of the leggiest animal, the millipede Illacme plenipes, with notes on its natural history and biogeography (Diplopoda, Siphonophorida, Siphonorhinidae). ZooKeys 241: 77–112. doi: 10.3897/zookeys.241.3831
  3. ↑ 3.0 3.1 Enghoff H, Golovatch S, Short M, Stoev P, Wesener T (2015) Diplopoda—Taxonomic Overview. In: Minelli A (Ed.) Treatise on Zoology - Anatomy, Taxonomy, Biology. The Myriapoda, 2. Brill, Leiden, 363–453.
  4. ↑ 4.0 4.1 Shelley R, Hoffman R (2004) A contribution on the South African millipede genus, Nematozonium Verhoeff, 1939 (Siphonophorida: Siphonorhinidae). African Entomology 12: 217–222.
  5. ↑ 5.0 5.1 Wesener T (2014) First records of the order Siphonophorida from Madagascar and Mauritius (Diplopoda). Revue suisse de Zoologie 121: 415–423.
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