Neotypification of Drawida hattamimizu Hatai, 1930 (Annelida, Oligochaeta, Megadrili, Moniligastridae) as a model linking mtDNA (COI) sequences to an earthworm type, with a response to the ' Can of Worms' theory of cryptic species
Author
Blakemore, Robert
Hanyang Uni Seoul, Seoul, Korea, South
Author
Kupriyanova, Elena
,, Japan
Author
Grygier, Mark
Lake Biwa Museum, Kusatsu ,, Japan
text
ZooKeys
2010
2010-03-26
41
4
1
29
journal article
10.3897/zookeys.41.374
00f6e7e3-859e-422d-b9a5-51c458a7575a
1313–2970
576648
Type-species
:
Moniligaster barwelli
Beddard, 1886
from
Manila
, by original designation.
Genus
diagnosis
(amended slightly from
Michaelsen, 1900: 114
;
Stephenson, 1923
,
1930
;
Gates, 1962
,
1972
;
Blakemore, 2002
,
2008a
): Small to giant [̴
1,000 mm
e.g.
Drawida hattamimizu
,
D. grandis
(Bourne, 1887)
] terrestrial earthworms. Setae lumbricine [said to have a “
smooth body without setae
” in
D. zhangetalia
Blakemore, 2006
nom. nov.
pro
D. cheni
Zhang et al., 2006
(non
D. cheni
Gates, 1935
)]. Dorsal pores absent or intermittently present (e.g. in some
D. barwelli
, and cf.
D. japonica
RJB pers. obs.). Spermathecal pores at 7/8 (spermathecae without Y-shaped “
dichotomously branched glands
” of
Moniligaster
Perrier, 1872
). Clitellum includes segments 10–13 but its exact extent often obscure. Male pores usually in or near 10/11 and female pores in or near 11/12. A pair of testes and male funnels typically in intraseptal sacs of 9/10. Short or sessile pseudo-prostates associated with male atria. Ovaries and oviducts typically in 11 with a pair of ovisacs extending posteriorly from septum 11/12. Last hearts in 9. Several, i.e., two to eight (or exceptionally nine in
D. hattamimizu
) moniliform intestinal gizzards within segments 11–27 [or
27–34 in
D. nilamburensis
(Bourne, 1894)
]. Holoic (and sometimes vesiculate) with blood capillaries on the nephridia. Oesophageal gizzards, calciferous glands, and intestinal caeca absent.
Taxonomic
Note:
Gender of the name
Drawida
– after the ‘Dravidians’ of Southern
India
/
Sri Lanka
– was not initially stated, but
Easton (1984: 111)
, citing ICZN articles (now
ICZN, 1999
: Art. 30.1.4), proposed to continue its treatment as a Latinized feminine noun.
Distribution
:
Indo-Oriental region, very widespread: “
Drawida
has a self-acquired range which may only be exceeded by that of the
Lumbricidae
, and is larger than that of the
Pheretima
s. lat.
domain, consequently it is expected to yield proportionately more species... Possibly,
Drawida
alone may prove to have the greater number of species
” (
Gates 1972: 238–239
). However, currently only about 200 nominal taxa are known (cf. 670 holarctic
Lumbricidae
versus 940 or so valid species of oriental pheretimoids in the family
Megascolecidae
-
Blakemore 2007a
,
2008a
). Described by
Stephenson (1923: 118
, 124, Chart 1) as “
one of the large Indian genera
”, its centres of diversity appears to lie in
Sri Lanka
, southern
India
, the eastern Himalayas, and
Myanmar
. At least one supposed native,
Drawida ghilarovi
Gates, 1969
from
Russia
in south-east Siberia, is listed in the Red Data Book for that region (Anon. 1997). The
type
,
Drawida barwelli
, was first recorded as an exotic from
Australia
by
Blakemore (1994
,
1999
), from
China
(
Hainan
) by
Blakemore (2007a
,
2008a
), and is a new Japanese record as “
D.
cf.
barwelli
” in the present study (from Kurotsu and Inazu, Shiga-ken - Biwako samples 4 and 5, collected from rice paddies,
17.VI.2009
by RJB & MJG). Relatively few species, apart from the cosmopolitan
D. barwelli
, are peregrine:
D. japonica
(Michaelsen, 1892)
has been reported from the western Indian Himalayas,
Yunnan
and Szechuan in
China
,
Japan
, and
Korea
, and is also found on
Taiwan
(also cf.
D. ramnadana
Michaelsen, 1907
from south
India
), but
Gates (1972)
was of the opinion that some records of
D. japonica
outside
Japan
/
Korea
were misidentifications. This latter possibility is briefly investigated herein as part of further studies (Blakemore in prep.) on its relationship with
D. barwelli
proper.