Lepidonella flava ( Carpenter, 1916 )

Nguyen, Minh & Soto-Adames, Felipe N., 2018, Annotated checklist of Afrotropical Trogolaphysa Mills, 1938 (Hexapoda: Collembola: Paronellidae) and description of a new species from Madagascar, Zoosystema 40 (10), pp. 179-196: 192-194

publication ID

http://doi.org/ 10.5252/zoosystema2018v40a10

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:F2681FDC-D9BE-48F8-918C-63CF67FF6F52

DOI

http://doi.org/10.5281/zenodo.3811395

persistent identifier

http://treatment.plazi.org/id/720BFC4C-FFEF-FF9E-FC35-FA9D1C2CACC6

treatment provided by

Felipe

scientific name

Lepidonella flava ( Carpenter, 1916 )
status

 

Lepidonella flava ( Carpenter, 1916)  

Microparonella   flava Carpenter, 1916: 43-44   , figs 59-62; key ( Seychelles). — Mitra 2002a: 67, 70 (generic status).

Paronella flava   – Handschin 1928: 23. — Yoshii 1961: 195 (suggestion it may belong in Callyntrura Börner, 1906).

Callyntrura (Microparonella) flava   – Jacquemart 1980: 8-9, fig. 3 (descriptive notes).

Lepidonella flava Deharveng & Bedos 1995: 22   , 23 (compared to Lepidonella lecongkieti Deharveng & Bedos, 1995   ). — Soto- Adames & Bellini 2015: 332 (compared to Lepidonella zepellinii Soto-Adames & Bellini, 2015   ).

TYPE LOCALITY. — Mahé, Fôret noire, Seychelles.

DISTRIBUTION. — Seychelles.

REMARKS

The generic assignment of this species is unclear. Carpenter (1916) originally placed the species in his newly described Microparonella   . Handschin (1928) transferred M. flava   to Paronella   without providing a justification. Yoshii (1961), suggested the species could belong in Callyntrura, but did not propose a formal change (Yoshii could have confused M. flava  

Carpenter, 1916 with Paronella flava Carpenter, 1917   ). In the Index to Collembola, Salmon (1964)  transferred M. flava   back to Paronella   , under the assumption that Microparonella   was a junior synonym of Paronella   . Salmon (1964) noticed the homonymy with P. flava Carpenter, 1917   and renamed P. flava ( Carpenter, 1916)   as P. seychelliensis   . Jacquemart (1980) concurred with Yoshii (1961) and formally proposed the combination Callyntrura (Microparonella) flava   , even though the drawings he provides show a mucro similar to that in Paronellini   or Bromacanthini rather than Callyntrurini.

Deharveng & Bedos (1995) made it clear that M. caerulea Carpenter, 1916, the Type species of Microparonella   , is a typical Troglopedetes   , but at the same time pointed out that most species assigned to Microparonella   do not belong in Troglopedetes   . Deharveng & Bedos (1995) transferred most Microparonella   to Lepidonella   , including M. flava   . Mitra (2002a) redescribed M. caerulea based on one syntype, concluded that Microparonella   was a valid genus and retained the original combination M. flava   . Unfortunately, the syntype studied by Mitra was missing antennal segments 2-4 and he was unaware of the presence of a subdivision on the 4 th antennal segment, as pointed out by Deharveng & Bedos (1995). In any case, the redefinition of Microparonella   proposed by Mitra (2002a) is so general that it differs from the diagnosis of Trogolaphysa   (sensu Thibaud & Najt 1988 or Soto-Adames 2015) only in that Microparonella   has smooth instead of striated or denticulate scales. Soto-Adames & Bellini (2015) accepted Deharveng & Bedos’ (1995) opinion on the status of M. flava   . Although L. flava   was cited in the diagnosis of L. zeppelinii Soto-Adames & Bellini, 2015   , the species was inadvertently excluded from the key to Lepidonella   of the World.

The original drawings of Carpenter (1916: plate 17, fig. 62), as well as the drawing by Jacquemart (1980) suggest this is either a Lepidonella   or a Trogolaphysa   with a 4-5 toothed, rectangular mucro. The few characters of the chaetotaxy described for the species are mostly ambiguous with respect to generic placement. Jacquemart’s (1980) illustration of the dorsal head chaetotaxy is limited to macrochaetae, whereas the distinguishing characters between Lepidonella   and Trogolaphysa   are found in the distribution of microchaetae (Soto-Adames et al. 2014; Soto-Adames & Bellini 2015). The absence of mesothoracic macrochaetae would suggest affinities to Lepidonella   (some Lepidonella   , such as L. zeppelini   and L. marimuti Soto-Adames & Bellini, 2015   , carry mesothoracic macrochaetae, but whereas in Paronellini   they are clustered near the pseudopore, in Lepidonella   they are clearly close to the posterior margin of the segment). However, mesothoracic macrochaetae in Trogolaphysa   are sometimes small and easily overlooked, especially if the specimens are old and opaque. The unusual distribution of bothriotricha (one on Abd. 2, three lateral and no inner on Abd. 3, and one on Abd. 4) illustrated by Jacquemart (1980), suggests the he might have missed the small sockets of mesothoracic macrochaetae. Most (all?) Paronellini   have 4 th abdominal segment element B6 (in the sense of Soto-Adames 2015) modified into a meso-, or small macrochaeta inserted near element B5, whereas in Lepidonella   , elements B5 and B6 are well separated, as in Lepidocyrtinae. Jacquemart’s (1980) illustration of the 4 th abdominal segment shows that B5 and B6 are well separated and the organization of the inner macrochaetae is similar to L. zeppellini   rather than to Paronellini   . Based on this last character we retain this species in Lepidonella   .

The diagnosis of this species is not well established, in part due to the morphological variation reported in the literature. The illustrations of the claw and mucro provided by Jacquemart (1980) differ from the original figures in Carpenter (1916): Carpenter shows a claw with basal teeth apparently subequal, and shorter than the unpaired tooth ( Fig. 5E View FIG ), whereas in Jacquemart one basal tooth is longer than the other and the longest of the pair is clearly longer than the unpaired tooth; in Carpenter’s figure the mucro has 5 teeth and in Jacquemart it has four. Otherwise, it is probably easier to identify this species as the single unmarked (or weakly marked) yellow Lepidonella   collected in the Seychelles.

Kingdom

Animalia

Phylum

Arthropoda

Class

Entognatha

Order

Collembola

Family

Paronellidae

Genus

Lepidonella

Loc

Lepidonella flava ( Carpenter, 1916 )

Nguyen, Minh & Soto-Adames, Felipe N. 2018
2018
Loc

Lepidonella flava

ADAMES F. N. & BELLINI B. C. 2015: 332
DEHARVENG L. & BEDOS A. 1995: 22
1995
Loc

(Microparonella) flava

JACQUEMART S. 1980: 8
1980
Loc

Paronella flava

YOSHII R. 1961: 195
HANDSCHIN E. 1928: 23
1928
Loc

Microparonella

MITRA S. K. 2002: 67
CARPENTER G. H. 1916: 44
1916