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Keys and Bibliography to the Collembola

Family Mydoniidae Salmon, 1945

page 23

Family Mydoniidae Salmon, 1945

Sub-Family Mydoniimae Salmon, 1945
Tribe Mydoniini nov.nom.

* As the name Coelura was used by Warren in the Lepidoptera prior to its usage by Schott in the Collembola, I propose the new name Metacoelura in its place.

* When erecting this genus in 1871, Lubbock definitely stated that the name was derived from the Greek Œipà (Seira), meaning a chain. The spelling Sira adopted by many authors is. therefore, not only gramatically incorrect, but also contrary to the rules of nomenclature and should be dropped. The name Sira is also preoccupied, having been used in 1838 for a genus of birds and again in 1855 for a genus in the Mollusca.

Key to the Genera of the Mydoniini
1. Scales entirely absent from the body 2
Scales present on the body 10
2. Body normal; furcula reaching forward to thorax; mucro distinct from dens 3
Body abnormal, strongly convex; antennae longer than body; furcula reaching forward to head; mucro not distinctly separated from dens, simple, with horn-like apex * Metacoelura nov. nom.
=Coelura Schött, 1917 (962)
3. Ocelli, eight to each side 5
Ocelli reduced or absent; claw with basal wing-like teeth 4
4. Tibiotarsi on their inner surfaces with two rows of plain setae; clavate tenent hairs, if present, then only weakly developed Sinella Brook, 1882 (170)
Tibiotarsi of first and second legs without plain setae; tibiotarsus of third leg with one plain setae opposite the tenent hair; clavate tenent hairs present Parasinella Bonet, 1934 (121)
5. Claw with wing-like basal teeth; tibiotarsus on inner surface, with at least one row of plain setae; tenent hairs present, but weak Deuterosinella Salmon, 1943 (914)
Claw with wing-like basal teeth; tenent hairs well developed 6
6. Mucro dentate 7
Macro falciform Drepanura Schött, 1891 (950)
7. Dens with spines 8
Dens without spines 9
8. Spines of dens simple Homidia Börner, 1906 (147)
Spines of dens serrated or ciliated, or both, and each arising from a distinct wart or papilla; setae of body of peculiar form and each arising from a wart or papilla Mesentotoma Salmon, 1942 (913)
9. Claw always with two large, generally elongate, external lateral basal teem in addition to normal external teeth Mydonius Gistl, 1838 (510)
=Entomobrya Rondani, 1861 (904)
Chorutes Burmeister, 1838 (198) [in part]
Isotoma Bourlet, 1839 (159) [in part]
Degeeria Nicolet, 1841 (798) [in part]
Claw always without large external lateral basal teeth, but usually with normal external lateral teeth Pseudentomobrya Salmon, 1941 (910)
10. Dens with spines 11
Dens without spines, but with or without scales 13
11. Claw with basal wing-like tooth; mucro sub-apical to dens and falciform Metasinella Denis, 1929 (363)
=Sulcuncus Mills, 1938 (767)
Claw without basal wing-like tooth; mucro at apex of dens 12
12. With a single row of dental spines Acanthurella Börner, 1906 (147)
With multiple rows of dental spines Acanthocyrtus Handschin, 1925 (533)page 24
13. Body scales apically either rounded or obtusely pointed; dens with scales 16
Body scales apically acutely pointed and with few striations; dens without scales 14
14. Mesonotum projecting forward and overlapping rear of head; Abd. VI with finger-like process Epimetrura Schött, 1925 (965)
Mesonotum not overlapping head; Abd. VI without finger-like process 15
15. Mucro bidentate with basal Spine Willowsia Shoebotham, 1917 (986)
Mucro falciform Drepanosira Bonet, 1942 (123)
=Parasira Bonet, 1930 (116)
16. Ant. III and Ant. IV or only Ant. IV annulated 17
Antennae not annulated 23
17. Mucro dentate 18
Mucro falciform 22
18. Mesonotum projecting forward and considerably overlapping head, about four times as long as metanotum 19
Mesonotum projecting forward, but not or only slightly overlapping head 20
19. Ocelli, eight to each side Lepidocyrtoides Schött, 1917 (962)
Ocelli reduced, six to each side Calistella Reuter, 1893 (Schött) (953)
20. Abdominal lasiotrichia present 21
Without abdominal lasiotrichia Mesira Scherbakov, 1898 (938)
21. Ocelli, eight to each side; mesonotum slightly overlapping head; dens without spines Promesira Womersley, 1942 (1184)
Ocelli absent; mesonotum not overlapping head; dens with spines Troglosinella Delamare-Deboutteville, 1949 (335)
22. Ant. II normal, without specialized sense organ of large setae Lepidocyrtinus Börner, 1903 (144)
Ant II with specialized sense organ consisting of a circle of long stout ciliated setae Lepidoregia Delamare-Deboutteville, 1948 (332)
23. Claw with basal wing-like teeth 24
Claw without basal wing-like teeth 28
24. Unguiculus as well as claw with wing-like teeth 25
Claw only with wing-like teem 26
25. Mucro dentate Protosirodes Börner, 1901 (136)
Mucro falciform with basal spine; Ant. II with spine-like process Lepidosinella Handschin, 1920 (528)
26. With a single wing-like tooth to claw 27
With two wing-like basal teeth to claw; mucro dentate with basal spine Pseudosinella Schaeffer, 1897 (934)
=Tullbergia Lie Pettersen, 1896 (683)
Pettersenia Scherbakov, 1898 (938)
Mesosirodes Börner, 1901 (136)
27. Mucro dentate Sirodes Schaeffer, 1900 (937)
Mucro falciform with basal spine Sinelloides Bonet, 1942 (123)
=Propesinella Salmon, 1945 (918)
Parasinella Carpenter, 1935 (241)
Pseudosinella Schaeffer, 1897 (934) [in part]
28. Scales chitinized, coloured, striations clearly visible; Ant. IV with apical exsertile knob 29
Scales hyaline; striations, if present scarcely visible; Ant. IV without apical exsertile knob 32
29. Mucro dentate 30
Mucro falciform * Seira Lubbock, 1870 (708)
=Sira Tullberg, 1872 (1074)
Pseudosira Schött, 1893 (954)
Calistocyrtus Ritter, 1911 (903)page 25
30. Scales very long and pointed, with short striations Lepidobrya Womersley, 1937 (1176)
Scales shorter 31
31. Claw with a pair of external, lateral basal teeth, generally elongate, in addition to normal external teeth; mucro-dens joint usually with bow-like lamella Urewera Salmon, 1941 (910)
Claw without external lateral basal teeth, but with normal external teeth; mucro without bow-like lamella: Lepidosira Schött, 1925 (965)
32. Clavate tenent hairs present; ocelli, eight to each side 33
Clavate tenent hairs absent; ocelli reduced 34
33. Mucro bidentate Lepidocyrtus Bourlet, 1839 (159)
=Paidium Koch, 1840 (662)
Mucro falciform Drepanocyrtus Handschin, 1925 (533)
34. Mucro bidentate, with one basal spine; ocelli, two to each side Lepidiaphanus Salmon, 1949 (925)
Mucro bidentate, with two basal spines; ocelli, six to each side * Setogaster nov. nom.
=Trichogaster Handschin, 1932 (560)
Tribe Orchesellini Börner, 1906

* As the name Trichogaster is preoccupied, having already been used in the Diptera, Protozoa and Pisces before Handschin used it, I propose the new name Setogaster in its place.

Key to the Genera of the Orchesellini
1. Scales present 2
Scales absent 10
2. Antennae with four segments, of which none is secondarily divided 3
Antennae with I or both I and II secondarily divided, giving the appearance of 5–6 segments 4
3. Ant IV longer than body and annulated; Abd. IV only slightly longer than Abd. III Typhlopodura Absolon, 1900 (5)
Ant III and Ant IV both annulated and much longer than body Mastigoceras Handschin, 1924 (531)
4. Apex of abdomen with a long finger-like process Heteromuricus Imms, 1912 (603)
Apex of abdomen without process 3
5. Antennae with five segments, Ant I being secondarily divided; Ants. IV and V or only V generally annulated 6
Antennae with six segments, Ants. I and II being secondarily divided, the fifth and sixth annulated; dens with spines Dicranocentrus Schött, 1893 (952)
6. Dens with spines; Ants. IV and V annulated Alloscopus Börner, 1906 (147)
Dens without spines 7
7. Abd. IV 8–10 times as long as Abd. III; mesonotum overlapping head; Ant. IV not annulated Strongylonotus MacGillivray. 1894 (725)
Abd. IV not more than five times as long as Abd. III 8
8. Antennae annulated; ocelli reduced to two or absent; Abd. IV three times as long as Abd. III 9
Antennae not annulated; ocelli, two to each side Heteromurodes Absolon, 1901 (8)page 26
9. Ants. IV and V both annulated; ocelli absent Verhoeffiella Absolon, 1900 (5)
Ant. V only annulated; ocelli, two to each side Ptenura Templeton, 1842 (1056)
=Heteromurus Wankel, 1860 (1122)
Templetonia Lubbock, 1862 (706)
Propemesira Salmon, 1942 (913) (918)
10. Antennae with six segments; Abd. IV twice as long as Abd III Orchesella Templeton, 1835 (1055)
=Heteretoma Bourlet, 1839 (159)
Aetheocerus Bourlet; 1842 (161)
Antennae with five segments: Abd. IV 3–4 times as long as Abd. III Orchesellides Bonet, 1930 (116)
=Orchezelandia Salmon, 1937
(908) (123)
Sub-Family Paronellinae Börner, 1906
Key to the Genera of the Paronellinae
1. Scales present 2
Scales absent 11
2. With thorax strongly humped dorsally 3
Thorax not humped; body normal 4
3. With the hump strongest on the mesothorax Idiomerus Imms, 1912 (603)
With the hump strongest on the metathorax Campylothorax Schött, 1893 (952)
4. Antennae half as long as body, with segments I and II densely clothed with long black setae; mucro with five teeth Dicranocentroides Imms, 1912 (603)
Antennae without long black setae; normal 5
5. Dens spined; mucro small, with 2–4 teeth 6
Dens without spines; mucro with 5–7 teeth 10
6. Dens with simple spines 7
Dens with serrated spines; mucro not distinctly separated from dens and with three teeth Bromacanthus Schött, 1925 (965)
7. Mucro sometimes reduced to a stump, but if dentate then with two teeth 9
Mucro well developed, with 3–4 teeth 8
8. Dens with apical scale-like lobe Paronella Schött, 1893 (952)
=Tricorypha Schött, 1893 (952)
Dens without apical scale-like lobe Callyntrura Börner, 1906 (147)
9. Dens at apex with two scale-like lobes Paronana Womersley, 1939 (1181)
Dens without scale-like lobes at apex Pseudoparonella Handschin, 1925 (533)
10. Dens at apex with two small scale-like appendages Handschinphysa Paclt 1947 (828)
=Phorophysa Salmon, 1945 (918)
Microphysa Handschin, 1925 (533)
Dens without scale-like appendages at apex Aphysa Handschin, 1925 (533)
11. Antennae at least twice as long as body 12
Antennae at most only slightly longer than body, sometimes shorter than body 15
12. Dentes with spines 13
Dentes without spines 14
13. Antennae more than twice as long as body, and on lower surface with long stiff setae, which are almost as long as the segment on which they are situated; Ant. IV annulated; dens at apex with two pubescent spine-like Parachaetoceras Salmon, 1941 (910)
Antennae without long setae; Ant. IV not annulated; dens at apex with scale-like plates ventrally and pubescent spine-like appendages dorsally Parasalina Salmon, 1944 (917)
=Paronana Womersley, 1939 (1181) [in part]page 27
14. Dens, near base of mucro, with a scale-like lobe; mucro with two teeth; antennae twice as long as body, without long setae Salina MacGillivray, 1894 (725)
=Cremastocephalus Schött, 1896 (957)
Dens without scale-like lobe; antennae more than twice as long as body and, on the lower surface, with long stiff setae—as long, or nearly as long, as the segment of the antennae on which they are situated * Plumachaetas nov. nom.
=Chaetoceras Handschin, 1926 (539)
15. Dentes with serrated spines; mucro with three teeth; antennae longer man body Glacialoca Salmon, 1941 (910)
Dentes without spines; mucro with 2–3 teeth 16
16. Antennae shorter than body; mucro with two teeth 17
Antennae longer than body 18
17. Small species, with a row of large, curved, ciliated, scale-like setae on each dens; dentes not annulated and without apical scale-like plates Micronellides Salmon, 1944 (917)
Large species, without scale-like setae on dentes, but with each dens annulated and provided with an apical scale-like plate Akabosia Kinoshita, 1919 (631)
18. Mucro with two teeth Paronellides Schött, 1925 (965)
=Pterikrypta Ritter, 1911 (903)
Pericrypta Schött, 1925 (965)
Mucro with three teeth Pseudoparonellides Salmon, 1941 (910)
Sub-Family Cyphoderinae Börner, 1906
Tribe Troglopedetini Börner, 1906

This sub-family contains two genera only; separated as follows:—

With a single ocellus to each side of the head Troglopedetina Delamare-Deboutteville, 1945 (315)
Ocelli absent Troglopedetes Absolon, 1907 (19)
=Cyphoderopsis Carpenter, 1917 (233)
Trogolaphysa Mills, 1938 (767)
Tribe Cyphoderini Börner, 1906

* The name Chaetoceras is preoccupied in the Lepidoptera, where it was used by Warren in 1896, and I propose the name Plumachaetas in its place.

Key to the Genera of the Cyphoderini
1. Mandibles normal, with molar plate; mouth terminal; dens with two rows of scales 2
Mandibles projecting, styliform, without molar plate or sometimes mouth shifted to sub-terminal ventral portion of head 7
2. Claws normal 3
Claws lobate or globular with basal spine; unguiculus sometimes reduced Cyphoderodes Silvestri, 1911 (989)
3. Dens 8–17 times longer than the mucro; mucro reduced, sometimes absent Cyphoda Delamare-Deboutteville, 1948 (332)
Dens 2–5 times longer than the mucro; mucro well developed, with teeth 4
4. Scales of dens on internal row progressively larger from base to apex and never more than three Serroderus Delamare-Deboutteville. 1948 (332)
Both rows of scales on dens more or less equal and not differing greatly from base to apex 5
5. Male with protuberance on Ant II Paracyphoderus Delamare-Deboutteville, 1948 (332)
Ant. II without protuberance 6page 28
6. Lateral and internal teeth of claw normal, not elongated Cyphoderus Nicolet, 1847 (801)
=Cyphodeirus Nicolet, 1842 (798)
Cyphodurus Nicolet, 1841 (797)
Beckia Lubbock, 1870 (708)
Lateral and internal teeth of claw greatly elongated, almost reaching to claw-tip Megacyphoderus Delamare-Deboutteville, 1948 (332)
7. Mouth parts styliform; mucro claw-like Calobatinus Silvestri, 1917 (991)
=* Calobatella Börner, 1913 (254)
Calobatana Strand, 1928 (1034)
Mouth parts normal, but sub-terminal and ventral 8
8. Mucro normal, toothed Cephalophilus Delamare-Deboutteville, 1948 (332)
Mucro reduced or absent 9
9. Mandible normal; mucro reduced, short, without teeth Pseudocyphoderus Imms, 1912 (603)
Mandibles reduced or absent; mucro absent Cyphoderinus Denis, 1942 (394)

* Calobatella was preoccupied when used by Börner and must, therefore, be replaced by Calobatinus Silvestri.